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Subject: Re: [dnsext] FQDN maximum length
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References: <1028365c0912131848p29de845fte3d53835e851b470@mail.gmail.com> <DE241C40-A1DD-4F68-97DD-1FFF34B31FF9@apple.com> <1028365c0912310814m4a0f72f8v9b8deeefbf8dd952@mail.gmail.com>
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On 31 Dec 2009, at 8:14, Donald Eastlake wrote:

> Possibly the 255 byte wire encoding limit was chosen so the byte  
> string could be represented inside a computer for processing in 256  
> bytes by adding a length byte as Pascal might do.

Or possibly the 255 byte limit was chosen to leave one byte space for  
the zero terminator on the end?

In any case we made a decision for Multicast DNS that a domain name  
object in memory can be up to 256 bytes -- a convenient power of two  
-- which is 255 bytes for label octets and label length octets, plus  
one byte for the zero terminator on the end. And we wrote a document  
that said so very clearly, to avoid any confusion.

Stuart Cheshire <cheshire@apple.com>
* Wizard Without Portfolio, Apple Inc.
* Internet Architecture Board
* www.stuartcheshire.org



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From owner-namedroppers@ops.ietf.org  Fri Jan  1 15:35:20 2010
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References: <1028365c0912131848p29de845fte3d53835e851b470@mail.gmail.com> <DE241C40-A1DD-4F68-97DD-1FFF34B31FF9@apple.com> <1028365c0912310814m4a0f72f8v9b8deeefbf8dd952@mail.gmail.com> <960F85A6-9BAD-447D-956D-D1AEB2B5FD58@apple.com>
Date: Fri, 1 Jan 2010 18:21:21 -0500
Message-ID: <1028365c1001011521s76f4547bmec198eb290f84fdf@mail.gmail.com>
Subject: Re: [dnsext] FQDN maximum length
From: Donald Eastlake <d3e3e3@gmail.com>
To: Stuart Cheshire <cheshire@apple.com>
Cc: IETF DNSEXT WG <namedroppers@ops.ietf.org>
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--0016e6d778ed2ad40d047c22a118
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Hi Stuart,

On Fri, Jan 1, 2010 at 12:39 PM, Stuart Cheshire <cheshire@apple.com> wrote:

> On 31 Dec 2009, at 8:14, Donald Eastlake wrote:
>
>  Possibly the 255 byte wire encoding limit was chosen so the byte string
>> could be represented inside a computer for processing in 256 bytes by adding
>> a length byte as Pascal might do.
>>
>
> Or possibly the 255 byte limit was chosen to leave one byte space for the
> zero terminator on the end?
>

Sure, lots of things could have been in the mind of the RFC author.


> In any case we made a decision for Multicast DNS that a domain name object
> in memory can be up to 256 bytes -- a convenient power of two -- which is
> 255 bytes for label octets and label length octets, plus one byte for the
> zero terminator on the end. And we wrote a document that said so very
> clearly, to avoid any confusion.
>

Well, since its Informational, you can set that number at whatever you want.

I don't particularly see the point of the stuff in the draft about how
ambiguous some parts of some DNS RFCs are. In the IETF, when the
specification of a protocol is ambiguous on a point and there are
interoperable implementations, the ambiguity is resolved by seeing what
those implementations do. Although it was before my time, I believe this was
established when early IPv4 interop testing was done. People were
interoperating fine with checksum checking turned off but when it was turned
on, most failed to interoperate due to differing interpretations of the
spec. The spec was then changed to what the largest number of interoperating
implementations were doing.

But the multicast DNS draft also speaks about compatibility with existing
unicast DNS implementations and how you can frequently just tweak the
address used. Seems like that won't be true for the corner case of domain
names whose wire encoding is 256 bytes. So, it seems to me that that should
be noted in the draft.


> Stuart Cheshire <cheshire@apple.com>
> * Wizard Without Portfolio, Apple Inc.
> * Internet Architecture Board
> * www.stuartcheshire.org
>

Thanks,
Donald
=============================
Donald E. Eastlake 3rd   +1-508-634-2066 (home)
155 Beaver Street
Milford, MA 01757 USA
d3e3e3@gmail.com

--0016e6d778ed2ad40d047c22a118
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Hi Stuart,<div><br><div class=3D"gmail_quote">On Fri, Jan 1, 2010 at 12:39 =
PM, Stuart Cheshire <span dir=3D"ltr">&lt;<a href=3D"mailto:cheshire@apple.=
com">cheshire@apple.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex;">
<div class=3D"im">On 31 Dec 2009, at 8:14, Donald Eastlake wrote:<br>
<br>
</div><div class=3D"im"><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Possibly the 255 byte wire encoding limit was chosen so the byte string cou=
ld be represented inside a computer for processing in 256 bytes by adding a=
 length byte as Pascal might do.<br>
</blockquote>
<br></div>
Or possibly the 255 byte limit was chosen to leave one byte space for the z=
ero terminator on the end?<br></blockquote><div><br></div><div>Sure, lots o=
f things could have been in the mind of the RFC author.</div><div>=A0</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">
In any case we made a decision for Multicast DNS that a domain name object =
in memory can be up to 256 bytes -- a convenient power of two -- which is 2=
55 bytes for label octets and label length octets, plus one byte for the ze=
ro terminator on the end. And we wrote a document that said so very clearly=
, to avoid any confusion.<div>
<div></div><div class=3D"h5"></div></div></blockquote><div><br></div><div>W=
ell, since its Informational, you can set that number at whatever you want.=
</div><div><br></div><div>I don&#39;t particularly see the point of the stu=
ff in the draft about how ambiguous some parts of some DNS RFCs are. In the=
 IETF, when the specification of a protocol is ambiguous on a point and the=
re are interoperable implementations, the ambiguity is resolved by seeing w=
hat those implementations do. Although it was before my time, I believe thi=
s was established when early IPv4 interop testing was done. People were int=
eroperating fine with checksum checking turned off but when it was turned o=
n, most failed to interoperate due to differing interpretations of the spec=
. The spec was then changed to what the largest number of interoperating im=
plementations were doing.</div>
<div><br></div><div>But the multicast DNS draft also speaks about compatibi=
lity with existing unicast DNS implementations and how you can frequently j=
ust tweak the address used. Seems like that won&#39;t be true for the corne=
r case of domain names whose wire encoding is 256 bytes. So, it seems to me=
 that that should be noted in the draft.</div>
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex;"><div><div class=3D"h5">Stuart=
 Cheshire &lt;<a href=3D"mailto:cheshire@apple.com" target=3D"_blank">chesh=
ire@apple.com</a>&gt;<br>

* Wizard Without Portfolio, Apple Inc.<br>
* Internet Architecture Board<br>
* <a href=3D"http://www.stuartcheshire.org" target=3D"_blank">www.stuartche=
shire.org</a></div></div></blockquote><div><br></div><div>Thanks,</div>Dona=
ld<br clear=3D"all">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>Donald E. Eastlake 3rd =A0 +1-508-634-=
2066 (home)<br>
155 Beaver Street<br>Milford, MA 01757 USA<br><a href=3D"mailto:d3e3e3@gmai=
l.com">d3e3e3@gmail.com</a><br>=A0</div></div>

--0016e6d778ed2ad40d047c22a118--


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Hi Stuart,

While I respond in detail below, I think your basic problem is that you
didn't go about trying to clarify this ambiguity in the IETF way. You don't
resolve such things in the IETF by puzzling endlessly over every piece of
ambiguous RFC text you can find, as though it were some sort of holy writ.
Interoperability trumps the results of such puzzling and musing. "We believe
in rough consensus and *running cod**e*."

You should have asked any of the many well known DNS implementers or looked
at DNS open source or posted to the namedroppers mailing list with your
question. In any case, the conclusion you came to was incorrect.

On Wed, Dec 30, 2009 at 8:02 PM, Stuart Cheshire <cheshire@apple.com> wrote:

> On 13 Dec 2009, at 18:48, Donald Eastlake wrote:
>
>  OK, here is what I think is a stupid question to which I think I know the
>> answer... but I wish to consult the wisdom of namedroppers.
>>
>
(The reason I said this was a stupid question was I was already quite sure
what the wire format limits were and just wanted to confirm this before
telling you.)


> I am doing a review of draft-cheshire-dnsext-multicastdns-08.txt. For some
>> reason, the authors believe that the words of RFC 1034 as follows
>>
>>     the total number of octets that represent a domain name (i.e.,
>>     the sum of all label octets and label lengths) is limited to 255
>>
>> are not clear. I thought they were clear.
>
>  As is often the case, things that may superficially appear clear at a
> casual glance are not so clear when you think about them more carefully.
>

The text quoted above seems perfectly clear to me no matter how much I think
about it. There is other more ambiguous text. But "the sum of all label
octets and label lengths" is absolutely clear. And, because it is talking
about lengths rather than periods/delimiters, it can't be talking about
anything but the wire encoding.

In any case, what the interoperable implementations do rules, not anyone's
thoughts, careful or not.


> RFC 1035 ("DNS Implementation and Specification") says:
>
>  2.3.4. Size limits
>>
>> Various objects and parameters in the DNS have size limits.  They are
>> listed below.  Some could be easily changed, others are more fundamental.
>>
>> labels          63 octets or less
>> names           255 octets or less
>
>  It would be nice if this said either:
>
>  labels          63 octets or less (including initial length byte)
>> names           255 octets or less (including final terminating zero)
>>
> or
>
>  labels          63 octets or less (excluding initial length byte)
>> names           255 octets or less (excluding final terminating zero)
>>
> Other context leads us to conclude that the label length limit does NOT
> include the initial length byte. Consistency would suggest that an
> equivalent interpretation might apply to the definition of name length
> limit.
>

You're right on labels, since the length is a 6 bit quantity with values
zero through 63 and if the length byte were included then the length value
field could not exceed 62 and there would need to be some text about what to
do if it has the value 63 and there is no such text.

But "consistency" and "equivalent interpretation" are in the eye of the
beholder. "Name" here seems to be short for fully qualified domain name
which includes the wire encoding of the terminating root label.


> Faced with this ambiguity, we consulted "Clarifications to the DNS
> Specification", RFC 2181.
>
> Given that the entire point of RFC 2181 was to recognize and remedy
> ambiguities in the original DNS specifications, one might hope that it was
> given thorough scrutiny by the IETF and DNSEXT to ensure that it did so, and
> consequently any information in it replaces and supersedes any unclear or
> ambiguous information in the earlier RFCs. RFC 2181 says:
>

But the problem is, as usual, that there are some things so fundamental that
all the knowledgeable people working on and reviewing such a document just
assume you know and think it's already clear since they just know what the
right thing is. It's commonly such simple, fundamental things that trip
people up. After all, if something is complex/rare/obscure, people will go
to pains explaining it thoroughly. But something as simple, common, and
plain as the wire encoding of domain names, which appear in every DNS
request and response and has been interoperably implemented many times over
many years, is easily glossed over.


>    The DNS itself places only one restriction on the particular labels
>>   that can be used to identify resource records.  That one restriction
>>   relates to the length of the label and the full name.  The length of
>>   any one label is limited to between 1 and 63 octets.  A full domain
>>   name is limited to 255 octets (including the separators).  The zero
>>
>>   length full name is defined as representing the root of the DNS tree,
>>   and is typically written and displayed as ".".
>>
> So, what do we make of that? Is this talking about the wire format of a
> domain name, or the conventional textual representation? The "including the
> separators" text implies this is talking about the textual representation,
> but it fails to say whether the trailing dot is included, and it also fails
> to say whether the trailing null byte typically at the end of a C string is
> included. As "clarifications" go, I've seen better. What's the length of "
> ietf.org"? Let's consider the four possibilities:
>
> (A) "ietf.org"    length =  8
> (B) "ietf.org."   length =  9
> (C) "ietf.org\0"  length =  9
> (D) "ietf.org.\0" length = 10
>

The wire encoding of this as an FQDN is always 10 bytes. The text encoding
is 9 as an FQDN and 8 as a relative domain name.

If you have this many possibilities and you find things this ambiguous about
something that has been interoperably implemented for so many years, why not
just ask?

It is true that one of the 103x DNS RFCs should had more hex examples,
including a specific example of a wire encoded maximum length domain name.


> Let's consider that for the case of the root name:
>
> (A) ""            length =  0
> (B) "."           length =  1
> (C) "\0"          length =  1
> (D) ".\0"         length =  2
>
> Is the length of "ietf.org" 8, 9 or 10? Is the length of the root name 0,
> 1, or 2? If only the document gave us some hint. Oh, wait, it does:
>
>    The zero length full name is defined as representing the root
>>   of the DNS tree, and is typically written and displayed as ".".
>>
> So RFC 2181 does tell us the answer. The length of "." is considered to be
> zero. So neither the trailing dot nor the trailing C-string null byte are
> included. That means interpretation (A) is the correct one, and the nominal
> "length" of "ietf.org" is 8.
>

I'm not claiming RFC 2181 is clear in this regard. The 2181 text is
confusing between text and wire representation.

The trailing null byte that ends all FQDNs has nothing to do with C-string
termination. It is the length of the label of the root node. There can be
embedded null bytes earlier in the FQDN inside other labels.


> This is consistent with other similar things in computing. A pascal string
> can be 0-255 bytes long, but it takes 1-256 bytes of storage, because of the
> length byte. Many software objects are a multiple of a power of two in size,
> because computers are more efficient at handling memory objects that are
> bus-aligned (typically 4 bytes), or cache-line aligned (e.g. 128-bytes), or
> VM-page aligned (e.g. 4KB).
>
> Limiting a domain name to 255 bytes of storage instead of 256 is just
> wasting a byte. In a C structure in memory, a 255-byte object is usually
> followed by an unused padding byte so that the next object is word-aligned.
>

But wire encoded fully qualified domain names are not C strings because a
zero byte is entirely valid inside a label. Possibly the 255 byte wire
encoding limit was chosen so the byte string could be represented inside a
computer for processing in 256 bytes by adding a length byte as Pascal might
do. But there is no overall FQDN length byte in the wire encoding.
Termination is indicated when you run into a zero value label length byte
since the zero length label is the label of root.

In such a world, where a pascal string can be 0-255 bytes long, and takes up
> to 256 bytes of storage, because of the length byte, it is consistent that:
>
> (a) a domain label can be up to 63 bytes long (and takes up to 64 bytes of
> storage, because of the length byte) and
> (b) a domain name can be up to 255 bytes long (and takes up to 256 bytes of
> storage, because of the terminating zero).


That's nice and, from some point of view, consistent, but it does not agree
with DNS implementations.

Stuart Cheshire <cheshire@apple.com>
> * Wizard Without Portfolio, Apple Inc.
> * Internet Architecture Board
> * www.stuartcheshire.org


Thanks,
Donald

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Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Hi=A0Stuart,<div><br></div><div>While I respond in detail below, I think yo=
ur basic problem is that you didn&#39;t go about trying to clarify this amb=
iguity in the IETF way. You don&#39;t resolve such things in the IETF by pu=
zzling endlessly over every piece of ambiguous RFC text you can find, as th=
ough it were some sort of holy writ. Interoperability trumps the results of=
 such puzzling and musing. &quot;We believe in rough consensus and <b>runni=
ng cod</b><b>e</b>.&quot;</div>

<div><br></div><div>You should have asked any of the many well known DNS im=
plementers or looked at DNS open source or posted to the namedroppers maili=
ng list with your question. In any case, the conclusion you came to was inc=
orrect.</div>

<div><br><div class=3D"gmail_quote">On Wed, Dec 30, 2009 at 8:02 PM, Stuart=
 Cheshire <span dir=3D"ltr">&lt;<a href=3D"mailto:cheshire@apple.com" targe=
t=3D"_blank">cheshire@apple.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">

<div>On 13 Dec 2009, at 18:48, Donald Eastlake wrote:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
OK, here is what I think is a stupid question to which I think I know the a=
nswer... but I wish to consult the wisdom of namedroppers.<br></blockquote>=
</div></blockquote><div><br></div><div>(The reason I said this was a stupid=
 question was I was already quite sure what the wire format limits were and=
 just wanted to confirm this before telling you.)</div>

<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">


I am doing a review of draft-cheshire-dnsext-multicastdns-08.txt. For some =
reason, the authors believe that the words of RFC 1034 as follows<br>
<br>
 =A0 =A0 the total number of octets that represent a domain name (i.e.,<br>
 =A0 =A0 the sum of all label octets and label lengths) is limited to 255<b=
r>
<br>
are not clear. I thought they were clear.=A0</blockquote></div></blockquote=
><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex"><div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


</blockquote></div>
As is often the case, things that may superficially appear clear at a casua=
l glance are not so clear when you think about them more carefully.<br></bl=
ockquote><div><br></div><div>The text quoted above seems perfectly clear to=
 me no matter how much I think about it. There is other more ambiguous text=
. But &quot;the sum of all label octets and label lengths&quot; is absolute=
ly clear. And, because it is talking about lengths rather than periods/deli=
miters, it can&#39;t be talking about anything but the wire encoding.</div>

<div><br></div><div>In any case, what the interoperable implementations do =
rules, not anyone&#39;s thoughts, careful or not.</div><div>=A0</div><block=
quote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc=
 solid;padding-left:1ex">


RFC 1035 (&quot;DNS Implementation and Specification&quot;) says:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
2.3.4. Size limits<br>
<br>
Various objects and parameters in the DNS have size limits. =A0They are<br>
listed below. =A0Some could be easily changed, others are more fundamental.=
<br>
<br>
labels =A0 =A0 =A0 =A0 =A063 octets or less<br>
names =A0 =A0 =A0 =A0 =A0 255 octets or less=A0</blockquote></blockquote><b=
lockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px =
#ccc solid;padding-left:1ex"><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


</blockquote>
It would be nice if this said either:<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
labels =A0 =A0 =A0 =A0 =A063 octets or less (including initial length byte)=
<br>
names =A0 =A0 =A0 =A0 =A0 255 octets or less (including final terminating z=
ero)<br>
</blockquote>
or<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
labels =A0 =A0 =A0 =A0 =A063 octets or less (excluding initial length byte)=
<br>
names =A0 =A0 =A0 =A0 =A0 255 octets or less (excluding final terminating z=
ero)<br>
</blockquote>
Other context leads us to conclude that the label length limit does NOT inc=
lude the initial length byte. Consistency would suggest that an equivalent =
interpretation might apply to the definition of name length limit.<br>

</blockquote><div><br></div><div>You&#39;re right on labels, since the leng=
th is a 6 bit quantity with values zero through 63 and if the length byte w=
ere included then the length value field could not exceed 62 and there woul=
d need to be some text about what to do if it has the value 63 and there is=
 no such text.</div>

<div><br></div><div>But &quot;consistency&quot; and &quot;equivalent interp=
retation&quot; are in the eye of the beholder. &quot;Name&quot; here seems =
to be short for fully qualified domain name which includes the wire encodin=
g of the terminating root label.</div>
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">

Faced with this ambiguity, we consulted &quot;Clarifications to the DNS Spe=
cification&quot;, RFC 2181.<br>
<br>
Given that the entire point of RFC 2181 was to recognize and remedy ambigui=
ties in the original DNS specifications, one might hope that it was given t=
horough scrutiny by the IETF and DNSEXT to ensure that it did so, and conse=
quently any information in it replaces and supersedes any unclear or ambigu=
ous information in the earlier RFCs. RFC 2181 says:<br>

</blockquote><div><br></div><div>But the problem is, as usual, that there a=
re some things so fundamental that all the knowledgeable people working on =
and reviewing such a document just assume you know and think it&#39;s alrea=
dy clear since they just know what the right thing is. It&#39;s commonly su=
ch simple, fundamental things that trip people up. After all, if something =
is complex/rare/obscure, people will go to pains explaining it thoroughly. =
But something as simple, common, and plain as the wire encoding of domain n=
ames, which appear in every DNS request and response and has been interoper=
ably implemented many times over many years, is easily glossed over.</div>

<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
 =A0 The DNS itself places only one restriction on the particular labels<br=
>
 =A0 that can be used to identify resource records. =A0That one restriction=
<br>
 =A0 relates to the length of the label and the full name. =A0The length of=
<br>
 =A0 any one label is limited to between 1 and 63 octets. =A0A full domain<=
br>
 =A0 name is limited to 255 octets (including the separators). =A0The zero<=
div><br>
 =A0 length full name is defined as representing the root of the DNS tree,<=
br>
 =A0 and is typically written and displayed as &quot;.&quot;.<br>
</div></blockquote>
So, what do we make of that? Is this talking about the wire format of a dom=
ain name, or the conventional textual representation? The &quot;including t=
he separators&quot; text implies this is talking about the textual represen=
tation, but it fails to say whether the trailing dot is included, and it al=
so fails to say whether the trailing null byte typically at the end of a C =
string is included. As &quot;clarifications&quot; go, I&#39;ve seen better.=
 What&#39;s the length of &quot;<a href=3D"http://ietf.org" target=3D"_blan=
k">ietf.org</a>&quot;? Let&#39;s consider the four possibilities:<br>


<br>
(A) &quot;<a href=3D"http://ietf.org" target=3D"_blank">ietf.org</a>&quot; =
=A0 =A0length =3D =A08<br>
(B) &quot;<a href=3D"http://ietf.org" target=3D"_blank">ietf.org</a>.&quot;=
 =A0 length =3D =A09<br>
(C) &quot;<a href=3D"http://ietf.org" target=3D"_blank">ietf.org</a>\0&quot=
; =A0length =3D =A09<br>
(D) &quot;<a href=3D"http://ietf.org" target=3D"_blank">ietf.org</a>.\0&quo=
t; length =3D 10<br></blockquote><div><br></div><div>The wire encoding of t=
his as an FQDN is always 10 bytes. The text encoding is 9 as an FQDN and 8 =
as a relative domain name.</div>

<div><br></div><div>If you have this many possibilities and you find things=
 this ambiguous about something that has been interoperably implemented for=
 so many years, why not just ask?</div><div><br></div><div>It is true that =
one of the 103x DNS RFCs should had more hex examples, including a specific=
 example of a wire encoded maximum length domain name.</div>
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">

Let&#39;s consider that for the case of the root name:<br>
<br>
(A) &quot;&quot; =A0 =A0 =A0 =A0 =A0 =A0length =3D =A00<br>
(B) &quot;.&quot; =A0 =A0 =A0 =A0 =A0 length =3D =A01<br>
(C) &quot;\0&quot; =A0 =A0 =A0 =A0 =A0length =3D =A01<br>
(D) &quot;.\0&quot; =A0 =A0 =A0 =A0 length =3D =A02<br>
<br>
Is the length of &quot;<a href=3D"http://ietf.org" target=3D"_blank">ietf.o=
rg</a>&quot; 8, 9 or 10? Is the length of the root name 0, 1, or 2? If only=
 the document gave us some hint. Oh, wait, it does:<div>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
 =A0 The zero length full name is defined as representing the root<br>
 =A0 of the DNS tree, and is typically written and displayed as &quot;.&quo=
t;.<br>
</blockquote></div>
So RFC 2181 does tell us the answer. The length of &quot;.&quot; is conside=
red to be zero. So neither the trailing dot nor the trailing C-string null =
byte are included. That means interpretation (A) is the correct one, and th=
e nominal &quot;length&quot; of &quot;<a href=3D"http://ietf.org" target=3D=
"_blank">ietf.org</a>&quot; is 8.<br>

</blockquote><div><br></div><div>I&#39;m not claiming RFC 2181 is clear in =
this regard. The 2181 text is confusing between text and wire representatio=
n.</div><div><br></div><div>The trailing null byte that ends all FQDNs has =
nothing to do with C-string termination. It is the length of the label of t=
he root node. There can be embedded null bytes earlier in the FQDN inside o=
ther labels.</div>

<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">
This is consistent with other similar things in computing. A pascal string =
can be 0-255 bytes long, but it takes 1-256 bytes of storage, because of th=
e length byte. Many software objects are a multiple of a power of two in si=
ze, because computers are more efficient at handling memory objects that ar=
e bus-aligned (typically 4 bytes), or cache-line aligned (e.g. 128-bytes), =
or VM-page aligned (e.g. 4KB).<br>


<br>
Limiting a domain name to 255 bytes of storage instead of 256 is just wasti=
ng a byte. In a C structure in memory, a 255-byte object is usually followe=
d by an unused padding byte so that the next object is word-aligned.<br>

</blockquote><div><br></div><div>But wire encoded fully qualified domain na=
mes are not C strings because a zero byte is entirely valid inside a label.=
 Possibly the 255 byte wire encoding limit was chosen so the byte string co=
uld be represented inside a computer for processing in 256 bytes by adding =
a length byte as Pascal might do. But there is no overall FQDN length byte =
in the wire encoding. Termination is indicated when you run into a zero val=
ue label length byte since the zero length label is the label of root.</div=
>

<div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex">
In such a world, where a pascal string can be 0-255 bytes long, and takes u=
p to 256 bytes of storage, because of the length byte, it is consistent tha=
t:<br>
<br>
(a) a domain label can be up to 63 bytes long (and takes up to 64 bytes of =
storage, because of the length byte) and<br>
(b) a domain name can be up to 255 bytes long (and takes up to 256 bytes of=
 storage, because of the terminating zero).</blockquote><div><br></div><div=
>That&#39;s nice and, from some point of view, consistent, but it does not =
agree with DNS implementations.=A0</div>

<div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex"><font color=3D"#888888">
Stuart Cheshire &lt;<a href=3D"mailto:cheshire@apple.com" target=3D"_blank"=
>cheshire@apple.com</a>&gt;<br>
* Wizard Without Portfolio, Apple Inc.<br>
* Internet Architecture Board<br>
* <a href=3D"http://www.stuartcheshire.org" target=3D"_blank">www.stuartche=
shire.org</a></font></blockquote><div><br></div><div>Thanks,</div><div>Dona=
ld</div><div>=A0</div></div></div>

--0016e6d784553f4cae047c088d26--


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From owner-namedroppers@ops.ietf.org  Mon Jan  4 06:34:37 2010
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From: The IESG <iesg-secretary@ietf.org> (by way of Paul Hoffman)
Subject: [dnsext] Last Call: draft-jabley-reverse-servers (Nameservers for IPv4 and IPv6 Reverse Zones) to Proposed Standard
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The IESG has received a request from an individual submitter to consider 
the following document:

- 'Nameservers for IPv4 and IPv6 Reverse Zones '
   <draft-jabley-reverse-servers-01.txt> as a Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action.  Please send substantive comments to the
ietf@ietf.org mailing lists by 2010-02-01. Exceptionally, 
comments may be sent to iesg@ietf.org instead. In either case, please 
retain the beginning of the Subject line to allow automated sorting.

The file can be obtained via
http://www.ietf.org/internet-drafts/draft-jabley-reverse-servers-01.txt


IESG discussion can be tracked via
https://datatracker.ietf.org/public/pidtracker.cgi?command=view_id&dTag=19391&rfc_flag=0


From owner-namedroppers@ops.ietf.org  Mon Jan  4 07:07:14 2010
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Subject: Re: [dnsext] Last Call: draft-jabley-reverse-servers (Nameservers for IPv4 and IPv6 Reverse Zones) to Proposed Standard
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From: David Conrad <drc@virtualized.org>
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To: The IESG (by way of Paul Hoffman) <iesg-secretary@ietf.org>
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In general, I strongly support this document.

My only question would be whether it would make sense to use =
"IP4-SERVERS.ARPA" instead of "IN-ADDR-SERVERS.ARPA" (a foolish =
consistency being the hobgoblin of little minds like my own).

Regards,
-drc

On Jan 4, 2010, at 9:19 AM, The IESG (by way of Paul Hoffman) wrote:

> The IESG has received a request from an individual submitter to =
consider=20
> the following document:
>=20
> - 'Nameservers for IPv4 and IPv6 Reverse Zones '
>   <draft-jabley-reverse-servers-01.txt> as a Proposed Standard
>=20
> The IESG plans to make a decision in the next few weeks, and solicits
> final comments on this action.  Please send substantive comments to =
the
> ietf@ietf.org mailing lists by 2010-02-01. Exceptionally,=20
> comments may be sent to iesg@ietf.org instead. In either case, please=20=

> retain the beginning of the Subject line to allow automated sorting.
>=20
> The file can be obtained via
> =
http://www.ietf.org/internet-drafts/draft-jabley-reverse-servers-01.txt
>=20
>=20
> IESG discussion can be tracked via
> =
https://datatracker.ietf.org/public/pidtracker.cgi?command=3Dview_id&dTag=3D=
19391&rfc_flag=3D0
>=20
>=20



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David Conrad wrote:
> In general, I strongly support this document.
> 
> My only question would be whether it would make sense to use "IP4-SERVERS.ARPA" instead of "IN-ADDR-SERVERS.ARPA" (a foolish consistency being the hobgoblin of little minds like my own).
> 
I agree with David.

I also question that this would be a "Proposed Standard".  I'm wondering
how they are going to demonstrate interoperability between multiple
implementations -- some sort of Internet in a parallel universe?

I suggest this should be an update to BCP52 (RFC 3172):
           Management Guidelines & Operational Requirements for
          the Address and Routing Parameter Area Domain ("arpa")



From owner-namedroppers@ops.ietf.org  Mon Jan  4 10:00:18 2010
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Subject: Re: [dnsext] Last Call: draft-jabley-reverse-servers (Nameservers for IPv4 and IPv6 Reverse Zones) to Proposed Standard
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On 2010-01-04, at 11:53, William Allen Simpson wrote:

> David Conrad wrote:
>> In general, I strongly support this document.
>> My only question would be whether it would make sense to use =
"IP4-SERVERS.ARPA" instead of "IN-ADDR-SERVERS.ARPA" (a foolish =
consistency being the hobgoblin of little minds like my own).
> I agree with David.
>=20
> I also question that this would be a "Proposed Standard".  I'm =
wondering
> how they are going to demonstrate interoperability between multiple
> implementations -- some sort of Internet in a parallel universe?
>=20
> I suggest this should be an update to BCP52 (RFC 3172):
>          Management Guidelines & Operational Requirements for
>         the Address and Routing Parameter Area Domain ("arpa")

Following section 3 of RFC 3172 was the only motivation to put this =
document forward for the standards track. Since there is no need for the =
document to ever progress from proposed standard to draft standard, =
there will be no need to demonstrate interop, etc.

It certainly seems possible that updating 3172 could have been another =
mechanism. However, modifying 3172 (as opposed to following its rules) =
seems likely to be a far more involved, political process; we were =
attempting to solve for operational pragmatism rather than philosophical =
perfection.


Joe


3. Delegation of "arpa" Sub-Domains

   While the decision as to which protocol elements are loaded into the
   "arpa" domain, and the hierarchical structure of such protocol
   elements, remains within the role of the IAB, the role of managing
   the sub-domain may be delegated by the IAB to an appropriate protocol
   management entity.

   The IAB shall only recommend the creation of "arpa" sub-domains
   corresponding to protocol entities where:

   -  the delegation, and the hierarchical name structure, is described
      by an IETF Standards Track document [4], and

   -  the use of the "arpa" domain is explicitly recommended in the
      "IANA Considerations" section of that document.

   The "IANA Considerations" section should include the name of the
   subdomain, the rules for how the subdomain is to be administered, and
   the criteria for entries within the subdomain.



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From owner-namedroppers@ops.ietf.org  Mon Jan  4 12:24:50 2010
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Subject: Re: [dnsext] we've been assuming that only one label matters
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On 1/4/10 1:24 AM, George Barwood wrote:
> On 12/27/09 11:43 AM Michael Graff wrote:
>
>> I personally think it's a tool issue, and no protocol changes need
>> to happen.  I don't see why the IETF needs to solve a problem
>> using protocol when it's fairly clear to me that any real solution
>> involving protocol changes is more or less a non-starter.
>
> I agree ( now that Michael has been brave enough to put his head
> above the parapet ).
>
> DNS has always recognised that Latin upper and lower case letters are
> equivalent, and this has historically been implemented on the server
> side.
>
> There is apparently a need to define a normalisation rule for more
> complex equivalences.
>
> I suggest this is best applied client side, either by humans knowing
> the rules, or in software.
>
> Increasing the complexity of the resolution process strikes me as a
> bad idea.

Agreed.

This could be done using a non-hostname label such as "_here" to handle
the DNAME node issue that would be placed within the referenced zone.  A
new resource record type could produce the same effect, without
modifying existing DNS protocol behavior, although it could provide some
optimizations.

Imagine the mess if zone cloning were used to handle case folding,
especially when considering TLDs.  Offering a visible feedback to those
entering a "non-preferred" form of a name seems like a good way to keep
them informed of the "official" site.

Allowing a TLD to create "equivalent" domains would then mean all domain
owners for that zone would need to acquire multiple certificates, and
zones.  This is not a nice thing to do.  Zone cloning would reduce cache
hit rates and reduce performance.  This would also mean more systems
would be necessary to support existing users, and would offset a few
Moore's Law generations of benefits thereby demanding more resources for
reduced performance.  An attitude perhaps emblematic of monopolies. :^(

-Doug



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From owner-namedroppers@ops.ietf.org  Mon Jan  4 14:11:54 2010
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Date: Mon, 4 Jan 2010 17:02:36 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] we've been assuming that only one label matters
Message-ID: <20100104220236.GD8857@shinkuro.com>
References: <a06240800c75531374766@[0.0.0.0]> <4B350F07.5050705@gis.net> <31698.1261770900@nsa.vix.com> <F0BD7ADF4F8585837DF1AF48@nimrod.local> <86075.1261848395@nsa.vix.com> <4B374878.7040002@isc.org> <1030A6E2AEBD4E0BA09498EE7EB9599C@localhost> <4B424C03.6070308@mail-abuse.org>
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No hat.

On Mon, Jan 04, 2010 at 12:13:55PM -0800, Douglas Otis wrote:

> Allowing a TLD to create "equivalent" domains would then mean all domain
> owners for that zone would need to acquire multiple certificates, and
> zones.  This is not a nice thing to do.  Zone cloning would reduce cache
> hit rates and reduce performance.  This would also mean more systems
> would be necessary to support existing users, and would offset a few
> Moore's Law generations of benefits thereby demanding more resources for
> reduced performance.  An attitude perhaps emblematic of monopolies. :^(

The latter remark walks precariously close to dismissing the entire
problem with an _ad hominem_ attack on the problem-claimers by
claiming they're just interested in profit.  I'm sure you didn't mean
it that way, though.

As several people have pointed out in the case at least of domain name
variants due to IDNA considerations, the plain fact is that all of the
negatives listed above are already problems _today_, except that there
is no automatic mechanism to make any of this work and that, in at
least some cases, the answer is simply that the user just can't get to
the domain that the user can type in.  So, as bad as the apparent
latent _ad hominem_, the objections aren't even realistic, since
they're already true.

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Mon Jan  4 14:26:15 2010
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Date: Mon, 4 Jan 2010 17:17:45 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] WG meeting or interim meeting about "name equivalence"
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Dear colleagues,

As you may recall, Olafur and I announced some time ago that we were
planning not to convene a WG meeting in Anaheim unless something
significant came up or we had signficant interest expressed.

We have determined that the recent discussion of the general topic of
making two names completely equivalent in the DNS requires some
real-time conversation.  We have two options before us.

The first is to schedule a session at the Anaheim meeting.

The second is to schedule an interim WG virtual meeting.  There have
been a number of recent such virtual meetings in other WGs, and we
think this might be an appropriate thing for us to do.  If we were to
do this, we would aim for mid-February.  It would probably happen at
about 10:00 EST, because that seems to provide _fairly_ global
availability even though it inconveniences just about everyone (we are
painfully aware that Olafur and I get off easy under this suggestion,
but if we move it earlier it's too early for the US West Coast and if
we move it any later it's way too late for anyone in the broad
Asia-Pacific region, whose residents have a significant stake in one
aspect of this issue).  Note that if we hold the interim, we'll
request an Anaheim WG meeting slot anyway in case a follow-up meeting
is warranted.  We'll decide after the interim whether we need another
meeting and, if so, when it should be; but we really anticipate making
decisions in this meeting.  Scheduling the Anaheim session would
really be a hedge.

In favour of having a session at Anaheim is that it gives us more lead
time to prepare, conforms with IETF conventions, allows us to put
faces and names together, and encourages hallway side conversations
that can easily result in a better answer than anything that has come
up in the meeting rooms.

In favour of holding a virtual interim is that it does not require
everyone to travel to Califiornia, it can be held sooner, and it might
attract some participants who do not plan to be in Anaheim, but who
are interested in this area (remember that IDNABIS is not likely to
meet, so a significant community of input to this discussion may well
not be in Anaheim).

We would like participants' feedback on which of these options they
prefer, and which of these would be acceptable to them (i.e. would you
participate in that option)?  We are especially interested in feedback
from those who have already committed to write something (or who have
already so written) on this topic.  From those people, we would _also_
like to know whether you could have a draft prepared in time for a
mid-Feb. meeting -- we think drafts would need to be available no
later than the end of January, giving participants roughly two weeks
for review and thought.

Please let us know by the end of this week.  We'll announce a decision
next Monday.

Best regards,

Andrew and Olafur

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Mon Jan  4 14:31:56 2010
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Date: Mon, 4 Jan 2010 17:23:22 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] Reminder: WGLC in process
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Dear colleagues,

This is a reminder that we have two WGLC in process.  Both close on Friday.

We have had a too-small number of reviews for the axfr-clarify
document.  Please review it.

The silence on the procedural documents to fix the registry and change
the rules for algorithm number assignment has been deafening.  More
than one person suggested, during LC on the GOST assignment, that we
could wait for the procedural changes to come into place.  It would be
nice if at least those who thought those procedural changes would be
helpful would now review those documents. 

Thanks and best for 2010,

Andrew

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Mon Jan  4 15:17:01 2010
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Date: Mon, 4 Jan 2010 15:07:18 -0800
Message-ID: <6e04e83a1001041507u684cab89od353c2cd894a8967@mail.gmail.com>
Subject: Re: [dnsext] WG meeting or interim meeting about "name equivalence"
From: Ted Hardie <ted.ietf@gmail.com>
To: Andrew Sullivan <ajs@shinkuro.com>
Cc: namedroppers@ops.ietf.org
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> In favour of holding a virtual interim is that it does not require
> everyone to travel to Califiornia, it can be held sooner, and it might
> attract some participants who do not plan to be in Anaheim, but who
> are interested in this area (remember that IDNABIS is not likely to
> meet, so a significant community of input to this discussion may well
> not be in Anaheim).
>

That sort-of assumes that the folks involved in IDNABIS would have no
other reason to be in Anaheim, which does not match my personal
sense of IDNABIS.

Perhaps more importantly, I think a conversation on "name equivalence"
held in the context of an IETF is more likely to get you discussion of what
kinds of equivalence different applications and deployments desire.  I
don't think you'll get that in a virtual meeting.

My personal suggestion would be to run this as a pseudo-BoF.  Do the
same kinds of outreach (to APPs, to RAI, etc.) that you would do for
a BoF in this space, and expect some of the same kinds of cross-area
tourist activity.  In this particular case, I personally think that would be
a good thing.

Two cents from someone who hasn't promised anything,

Ted


From owner-namedroppers@ops.ietf.org  Mon Jan  4 15:37:14 2010
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Subject: Re: [dnsext] WG meeting or interim meeting about "name equivalence"
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On 4 Jan 2010, at 22:17, Andrew Sullivan wrote:

> The second is to schedule an interim WG virtual meeting.  There have
> been a number of recent such virtual meetings in other WGs, and we
> think this might be an appropriate thing for us to do.  If we were to
> do this, we would aim for mid-February.  It would probably happen at
> about 10:00 EST

I think this would be a good idea.




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Subject: Re: [dnsext] we've been assuming that only one label matters
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On 1/4/10 2:02 PM, Andrew Sullivan wrote:
> No hat.
>
> On Mon, Jan 04, 2010 at 12:13:55PM -0800, Douglas Otis wrote:
>
>> Allowing a TLD to create "equivalent" domains would then mean all domain
>> owners for that zone would need to acquire multiple certificates, and
>> zones.  This is not a nice thing to do.  Zone cloning would reduce cache
>> hit rates and reduce performance.  This would also mean more systems
>> would be necessary to support existing users, and would offset a few
>> Moore's Law generations of benefits thereby demanding more resources for
>> reduced performance.  An attitude perhaps emblematic of monopolies. :^(
>
> The latter remark walks precariously close to dismissing the entire
> problem with an _ad hominem_ attack on the problem-claimers by
> claiming they're just interested in profit.  I'm sure you didn't mean
> it that way, though.
>
> As several people have pointed out in the case at least of domain name
> variants due to IDNA considerations, the plain fact is that all of the
> negatives listed above are already problems _today_, except that there
> is no automatic mechanism to make any of this work and that, in at
> least some cases, the answer is simply that the user just can't get to
> the domain that the user can type in.  So, as bad as the apparent
> latent _ad hominem_, the objections aren't even realistic, since
> they're already true.

Andrew,

While we agree there is a problem, asking for a specific solution 
"as-if" it were the _only_ solution motivated the comment based largely 
upon uncontested issues, IMHO.  Wasting resources has been emblematic 
behavior of those not challenged by competition.  Even assuming there 
was some practical manner in which to introduce zone cloning, affected 
users may not be happy with its resource costs.  My comments were not 
intended to play on emotions nor to denigrate those posing a question 
presupposing a zone cloning solution.

Not starting with a reasonable problem statement may have prematurely 
narrowed discussions with respect to zone cloning being seen as the only 
viable solution for syntactic or synonymic uncertainty confronting the 
use of IDNA.  Narrowing focus in this manner does preclude consideration 
of what might be less problematic and wasteful alternatives.

ACE label accommodation of Unicode in DNS was a disruptive change for 
many clients.  Timidity in not wanting to go back to those that just 
implemented these changes and ask for more is understandable.  However, 
reliance upon a zone cloning solution in DNS will further increase 
future difficulties when consolidating name resolution services.

-Doug







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Andrew,

My preference is for the longer lead time and the face to face.

Not all of the use case scenarios arise out of an IDNAbis necessity 
for a vehicle for handling variants.

Few, if any, of the policy based requests for mechanism will consider 
anything other than names, or side effects. At ICANN Seoul a large 
fraction of the policy based requestors assumed that DNAME did it all, 
which is not the case.

Eric





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On 5 jan 2010, at 00.07, Ted Hardie wrote:

> That sort-of assumes that the folks involved in IDNABIS would have no
> other reason to be in Anaheim, which does not match my personal
> sense of IDNABIS.

I think a number of IDNABIS people will be in Anaheim. I am for example =
planning to be there.

   Patrik



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From owner-namedroppers@ops.ietf.org  Tue Jan  5 07:00:25 2010
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Date: Tue, 5 Jan 2010 06:51:07 -0800
To: Patrik Fältström <paf@cisco.com>, Ted Hardie <ted.ietf@gmail.com>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [dnsext] WG meeting or interim meeting about "name equivalence"
Cc: Andrew Sullivan <ajs@shinkuro.com>, namedroppers@ops.ietf.org
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At 7:39 AM +0100 1/5/10, Patrik Fältström wrote:
>On 5 jan 2010, at 00.07, Ted Hardie wrote:
>
>> That sort-of assumes that the folks involved in IDNABIS would have no
>> other reason to be in Anaheim, which does not match my personal
>> sense of IDNABIS.
>
>I think a number of IDNABIS people will be in Anaheim. I am for example planning to be there.

The registries for whom IDNAbis has caused new problems that require "name equivalence" are probably not going to be in Anaheim, given that they have not been active at almost any other IETF meeting since Dublin. The registries for whom IDNA2003 and IDNAbis has always caused problems that require "name equivalence" already have people on namedroppers.

--Paul Hoffman, Director
--VPN Consortium


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Date: Tue, 5 Jan 2010 10:00:13 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] we've been assuming that only one label matters
Message-ID: <20100105150011.GK8857@shinkuro.com>
References: <a06240800c75531374766@[0.0.0.0]> <4B350F07.5050705@gis.net> <31698.1261770900@nsa.vix.com> <F0BD7ADF4F8585837DF1AF48@nimrod.local> <86075.1261848395@nsa.vix.com> <4B374878.7040002@isc.org> <1030A6E2AEBD4E0BA09498EE7EB9599C@localhost> <4B424C03.6070308@mail-abuse.org> <20100104220236.GD8857@shinkuro.com> <4B4280BE.3030909@mail-abuse.org>
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On Mon, Jan 04, 2010 at 03:58:54PM -0800, Douglas Otis wrote:
> While we agree there is a problem, asking for a specific solution  
> "as-if" it were the _only_ solution motivated the comment based largely  
> upon uncontested issues, IMHO.  

I don't understand: what specific solution do you think is being asked
for?  I have asked people to _think about_ and _discuss_ one possible
general area where we might make an extension to the DNS.  One result
of that thinking and discussion could surely be, "We think this is a
bad idea and we shouldn't do anything (more) here."  It's perfectly
legitimate to take the position that nothing should be done.  In my
view (and I say this not just as an individual, but also in my
capacity as a chair), it is quite another matter to suggest that the
very question is wrong, that we shouldn't even talk about it, and that
the only reason anyone might be interested in this is out of some
monopoly interest.  On a personal, no-hat note, the charge of
monopolism particularly bothers me in this case, because it's a
complete red herring.  _Someone_ is going to have to publish a given
zone, and though you can whittle away at how many things that body
does, zone publication is still a natural monopoly.  Sprinkling
magical competition dust over such monpopolies, as anyone with a
passing acquaintance with economic history knows, mostly just
increases costs, diminshes benefits, and usually results in broken
service.

> Not starting with a reasonable problem statement may have prematurely  
> narrowed discussions with respect to zone cloning being seen as the only  
> viable solution for syntactic or synonymic uncertainty confronting the  
> use of IDNA.  

Two things about this remark:

    1.  We are groping our way _toward_ a problem statement.  That's
    why we're having a discussion.  I take seriously the objection
    that the problem is underdefined right now.  Yes, we need to fix
    that, but we're not going to do it by refusing to talk about what
    the problem and solution spaces might look like.

    2.  This WG discusses changes to the DNS protocols.  It is not a
    forum for general discussion of ways to accomplish fun things with
    namespaces.  One of the conclusions we might draw is, "Yes, there
    is an interesting problem here, and it needs to be fixed, and we
    thing $SOMEONE should do it," where $SOMEONE is not-us and maybe a
    new WG or maybe an existing WG or maybe implementers of tools or
    maybe some class of people I haven't thought of.

> ACE label accommodation of Unicode in DNS was a disruptive change for  
> many clients.  Timidity in not wanting to go back to those that just  
> implemented these changes and ask for more is understandable.

Maybe you're unaware that an entire WG is in the throes of finishing
up, which WG was chartered precisely to ask those that just
implemented to go back and do something else, more complicated; and
that the publication of the resulting documents is held up exactly
because of the angry reaction from implementers about
backward-incompatible changes.  There are practical issues on all
sides.  All we can do is work on the issues for which we are
responsible, and come back with our best efforts.  Surely we can do
better than, "Not a problem!  Evil monopolist!  Go away!"

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


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From owner-namedroppers@ops.ietf.org  Tue Jan  5 08:42:04 2010
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On 1/5/10 10:00 AM, Andrew Sullivan wrote:
> On Mon, Jan 04, 2010 at 03:58:54PM -0800, Douglas Otis wrote:
... _Someone_ is going to have to publish a given
> zone, and though you can whittle away at how many things that body
> does, zone publication is still a natural monopoly.


Well, not to quibble completely unnecessarily, the original SRS 
proposal (Crispen, Crocker, Gaetano) did envision competition in the 
"registry function", rather than in the "registrar function", which is 
the model the US DoC selected for attempting to transform a 
competitive, single-source contract (the successor to the SRI-NIC 
contract) into a competitive market. So, as is, the registries are all 
monopolies.

Assuming that, hypothetically, VGRS operated the [a-m] spindles for 
some zone, and CORE operated the [n-z] spindles for the same zone, the 
construction of a single complete zone file from the union of two 
disjoint partial zone file fragments has multiple solutions.

So, not a "natural monopoly", but pretty natural assuming the SRS 
never ment shared _registry_ service, and always ment shared [access 
to unshared] registry service. There's probably only the four or so of 
us who remember.


   Sprinkling
> magical competition dust over such monpopolies, as anyone with a
> passing acquaintance with economic history knows, mostly just
> increases costs, diminshes benefits, and usually results in broken
> service.


Note, it isn't unreasonable to revisit the early Clinton 
administration deregulation decision and return to a monopoly registry 
service. The only unreasonable part is leaving that monopoly in the 
hands of an unregulated for-profit private actor.



>> Not starting with a reasonable problem statement may have prematurely
>> narrowed discussions with respect to zone cloning being seen as the only
>> viable solution for syntactic or synonymic uncertainty confronting the
>> use of IDNA.
>
> Two things about this remark:
>
>      1.  We are groping our way _toward_ a problem statement.  That's
>      why we're having a discussion.  I take seriously the objection
>      that the problem is underdefined right now.  Yes, we need to fix
>      that, but we're not going to do it by refusing to talk about what
>      the problem and solution spaces might look like.


Actually I think it is overspecified if the problem scope is 
restricted to "variants", I think the area of application is larger, 
and as an example, when proposing .nyc (it went to the City on 12/23), 
I proposed that the projections of two other zones (.museum and .coop) 
in either the flat, or hierarchical namespace(s) of .nyc be present by 
policy, and ease of implementation suggests that each registrant have 
the choice of managing only one set of resources for which two or more 
names map to.

For those keeping score, this is an application of the reciprocal 
cross registration that CNNIC, TWNIC, HKNIC and MANIC proposed to 
ensure that "unbundled" registrations resolved correctly across the 
four CDNC participant registries in mid-2001. Registry scoped bundling 
(of SC/TC mappings) is an alternative mechanism, and the one deployed 
today.


>
>      2.  This WG discusses changes to the DNS protocols.  It is not a
>      forum for general discussion of ways to accomplish fun things with
>      namespaces.  One of the conclusions we might draw is, "Yes, there
>      is an interesting problem here, and it needs to be fixed, and we
>      thing $SOMEONE should do it," where $SOMEONE is not-us and maybe a
>      new WG or maybe an existing WG or maybe implementers of tools or
>      maybe some class of people I haven't thought of.


+1.


>> ACE label accommodation of Unicode in DNS was a disruptive change for
>> many clients.  Timidity in not wanting to go back to those that just
>> implemented these changes and ask for more is understandable.
>
> Maybe you're unaware that an entire WG is in the throes of finishing
> up, which WG was chartered precisely to ask those that just
> implemented to go back and do something else, more complicated; and
> that the publication of the resulting documents is held up exactly
> because of the angry reaction from implementers about
> backward-incompatible changes.  There are practical issues on all
> sides.  All we can do is work on the issues for which we are
> responsible, and come back with our best efforts.  Surely we can do
> better than, "Not a problem!  Evil monopolist!  Go away!"
>
> A

+1.

Eric



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On 1/5/10 7:00 AM, Andrew Sullivan wrote:
> On Mon, Jan 04, 2010 at 03:58:54PM -0800, Douglas Otis wrote:
>> While we agree there is a problem, asking for a specific solution
>> "as-if" it were the _only_ solution motivated the comment based
>> largely upon uncontested issues, IMHO.
>
> I don't understand: what specific solution do you think is being
> asked for?

Paul Hoffman's statement on 12/14/09:
After denouncing a suggestion that application layer redirection
might offer a solution he said:

"For those who are on namedroppers but not IDNAbis: think of the two
FQDNs with a single owner who wants the two names to be synonyms.
ibm.com and ibm.net is a reasonable example. It does not matter how the
two names came into existence; in fact, that is a rathole that is not
relevant to the question."

This concept has since been called "zone cloning" or "cloning zones".
Zone cloning might place burdens upon users when applied at the TLD,
which, was the motivation for seeking a better solution, as explained in
Hiroshima.

> I have asked people to _think about_ and _discuss_ one possible
> general area where we might make an extension to the DNS.  One result
> of that thinking and discussion could surely be, "We think this is a
> bad idea and we shouldn't do anything (more) here."

Of course, more can be done. Solutions other than zone cloning have been
offered as well.  Can they be discussed as well?  Whether a solution is
found on the client or the server appears to be the crux of the matter.

This _does_ require an understanding as to why two names came into
existence, where implementing a redirection rather than a zone cloning
mechanism would conserve resources.  In addition, any client side
solution would provide better scaling characteristics as well.

There also appears to be misconceptions with respect to the resource
impact zone cloning at the TLD or SLD could entail.

> It's perfectly legitimate to take the position that nothing should
> be done. In my view (and I say this not just as an individual, but
> also in my capacity as a chair), it is quite another matter to
> suggest that the very question is wrong, that we shouldn't even talk
> about it, and that the only reason anyone might be interested in this
> is out of some monopoly interest.

You have misunderstood.  There are consumer related issues where
monopolies have been emblematically insensitive.  As such, these areas
of likely insensitivity should not be overlooked, especially in respect
to requisite resources.

> On a personal, no-hat note, the charge of monopolism particularly
> bothers me in this case, because it's a complete red herring.
> _Someone_ is going to have to publish a given zone, and though you
> can whittle away at how many things that body does, zone publication
>  is still a natural monopoly.  Sprinkling magical competition dust
> over such monpopolies, as anyone with a passing acquaintance with
> economic history knows, mostly just increases costs, diminshes
> benefits, and usually results in broken service.

The comment was intended to make proponents of a zone cloning solution
sensitive to resource impacts this could have on those then needing
to publish multiple domain names under a list of TLD and SLD cloned
names.  A zone cloning solution will subsequently require a significant
increase in the number of servers required to support DNS and the
reliant services.  This group should remain sensitive to the impact upon
requisite resources.

>> Not starting with a reasonable problem statement may have
>> prematurely narrowed discussions with respect to zone cloning
>> being seen as the only viable solution for syntactic or synonymic
>> uncertainty confronting the use of IDNA.
>
> Two things about this remark:
>
> 1.  We are groping our way _toward_ a problem statement.  That's why
> we're having a discussion.  I take seriously the objection that the
> problem is underdefined right now.  Yes, we need to fix that, but
> we're not going to do it by refusing to talk about what the problem
> and solution spaces might look like.

Such as why multiple names exist?

> 2.  This WG discusses changes to the DNS protocols.  It is not a
> forum for general discussion of ways to accomplish fun things with
> namespaces.  One of the conclusions we might draw is, "Yes, there is
> an interesting problem here, and it needs to be fixed, and we thing
> $SOMEONE should do it," where $SOMEONE is not-us and maybe a new WG
> or maybe an existing WG or maybe implementers of tools or maybe some
> class of people I haven't thought of.
>
>> ACE label accommodation of Unicode in DNS was a disruptive change
>> for many clients.  Timidity in not wanting to go back to those
>> that just implemented these changes and ask for more is
>> understandable.
>
> Maybe you're unaware that an entire WG is in the throes of finishing
> up, which WG was chartered precisely to ask those that just
> implemented to go back and do something else, more complicated; and
> that the publication of the resulting documents is held up exactly
> because of the angry reaction from implementers about
> backward-incompatible changes.  There are practical issues on all
> sides.  All we can do is work on the issues for which we are
> responsible, and come back with our best efforts.  Surely we can do
> better than, "Not a problem!  Evil monopolist!  Go away!"

Agreed.  There is no desire to make anyone's task more difficult, but 
that alone should not determine the ultimate architecture.

-Doug



From owner-namedroppers@ops.ietf.org  Tue Jan  5 13:36:28 2010
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I generally approve of the document going forward, except for comments =
on section 3.4.

The text:

  Name compression in an AXFR message MUST preserve the case of the
  original domain name.

is unclear, and seems to make incorrect assumptions about general name
server behavior.  With respect to AXFR, the relevant point is that name
compression preserve the case of the domain name as known by the name
server, which may or may not be the original domain name as configured
by the zone operator.

RFC 1034, section 3.1 (as referenced), says:

 When you receive a domain name or label, you should preserve its case.

This says "should", so is not mandatory, and doesn't specifically refer
to AXFR, so any changes to this shouldn't be in an AXFR clarify
document.

While most name server implementations attempt to preserve case whenever
possible, making full case preservation mandatory would be a major
undertaking.

Authoritative name servers generally do not store fully qualified owner
names; they store names relative to the zone origin.  To use BIND as an
example, when configuring the zone "example.com.", it doesn't matter if
a record with the name "A.EXAMPLE.COM." is specified in the zone file;
the name will be stored relative to the zone name, and the original case
cannot be recovered for the purposes of AXFR.

Additionally, authoritative name servers generally do not store a
separate copy of the owner name for each record associated with it.  So,
if records are present for "abc.example.com.", "ABC.example.com.", and
"aBc.example.com.", there is no way to transmit each record with its
original case.

If there is a "MUST" requirement for servers to fully preserve case of
all records, that should be in a new general clarification document
(which I would think was a bad idea), not a clarification of AXFR.

Brian=


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From owner-namedroppers@ops.ietf.org  Wed Jan  6 12:13:57 2010
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Date: Wed, 6 Jan 2010 14:59:18 -0500
To: Brian Wellington <brian.wellington@nominum.com>
From: Edward Lewis <Ed.Lewis@neustar.biz>
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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(First, Niall - thanks for the nits.  I'm just back from being in a 
cave for 2 weeks.)

As to what Brian raises:

We know this document has been around a while, making dredging up old 
threads on it hard.  There was something in the past that made case 
preservation a hot issue - why it was featured here with a MUST.

Looking through my archives, in March 2008 there was a message by 
Robert Elz that referred to a comment by Mark Andrews about case 
preservation being something of interest in AXFR and no where else. 
I'll lay this out in case someone has a better memory of this.

But, consider this too - "original" was probably the wrong term to 
use, as I was thinking "original wrt AXFR server" and not original 
wrt zone admin (aka DNSSEC's "original").

What I had envisioned was if the AXFR server sees 
AbC.server.example., aaa.server.example., back.SERVER.example. and 
cab.SERVER.example., then there would be two "compression chains:

position in message     label
20                      example.
100                     aaa.server."20"
200                     aBc."104" (100+"aaa" = position 104)
300                     back.SERVER."20"
400                     cab."305" (300+"back" = position 305)

Maybe that's unrealistic too.  But that's what I had meant.  Brian - 
is this also unrealistic?  Should this discussion just be dropped? 
Can we do anything to promote case preservation in AXFRs at all or is 
it a lost cause?

At 13:28 -0800 1/5/10, Brian Wellington wrote:
>I generally approve of the document going forward, except for 
>comments on section 3.4.
>
>The text:
>
>   Name compression in an AXFR message MUST preserve the case of the
>   original domain name.
>
>is unclear, and seems to make incorrect assumptions about general name
>server behavior.  With respect to AXFR, the relevant point is that name
>compression preserve the case of the domain name as known by the name
>server, which may or may not be the original domain name as configured
>by the zone operator.
>
>RFC 1034, section 3.1 (as referenced), says:
>
>  When you receive a domain name or label, you should preserve its case.
>
>This says "should", so is not mandatory, and doesn't specifically refer
>to AXFR, so any changes to this shouldn't be in an AXFR clarify
>document.
>
>While most name server implementations attempt to preserve case whenever
>possible, making full case preservation mandatory would be a major
>undertaking.
>
>Authoritative name servers generally do not store fully qualified owner
>names; they store names relative to the zone origin.  To use BIND as an
>example, when configuring the zone "example.com.", it doesn't matter if
>a record with the name "A.EXAMPLE.COM." is specified in the zone file;
>the name will be stored relative to the zone name, and the original case
>cannot be recovered for the purposes of AXFR.
>
>Additionally, authoritative name servers generally do not store a
>separate copy of the owner name for each record associated with it.  So,
>if records are present for "abc.example.com.", "ABC.example.com.", and
>"aBc.example.com.", there is no way to transmit each record with its
>original case.
>
>If there is a "MUST" requirement for servers to fully preserve case of
>all records, that should be in a new general clarification document
>(which I would think was a bad idea), not a clarification of AXFR.
>
>Brian

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Edward Lewis
NeuStar                    You can leave a voice message at +1-571-434-5468

As with IPv6, the problem with the deployment of frictionless surfaces is
that they're not getting traction.


From owner-namedroppers@ops.ietf.org  Wed Jan  6 12:35:03 2010
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On Jan 6, 2010, at 11:59 AM, Edward Lewis wrote:

> (First, Niall - thanks for the nits.  I'm just back from being in a =
cave for 2 weeks.)
>=20
> As to what Brian raises:
>=20
> We know this document has been around a while, making dredging up old =
threads on it hard.  There was something in the past that made case =
preservation a hot issue - why it was featured here with a MUST.
>=20
> Looking through my archives, in March 2008 there was a message by =
Robert Elz that referred to a comment by Mark Andrews about case =
preservation being something of interest in AXFR and no where else. I'll =
lay this out in case someone has a better memory of this.

The only messages I'm seeing from then are related to 0x20, which =
shouldn't have any effect on AXFR, but I'm also not seeing a reference =
to a comment from Mark Andrews.  Was this on namedroppers or some other =
list?

> But, consider this too - "original" was probably the wrong term to =
use, as I was thinking "original wrt AXFR server" and not original wrt =
zone admin (aka DNSSEC's "original").

OK.  If the wording was clearer, it would be better.

> What I had envisioned was if the AXFR server sees AbC.server.example., =
aaa.server.example., back.SERVER.example. and cab.SERVER.example., then =
there would be two "compression chains:
>=20
> position in message     label
> 20                      example.
> 100                     aaa.server."20"
> 200                     aBc."104" (100+"aaa" =3D position 104)
> 300                     back.SERVER."20"
> 400                     cab."305" (300+"back" =3D position 305)
>=20
> Maybe that's unrealistic too.  But that's what I had meant.  Brian - =
is this also unrealistic?  Should this discussion just be dropped? Can =
we do anything to promote case preservation in AXFRs at all or is it a =
lost cause?

I believe this is realistic, but am having trouble figuring out why this =
is important, given that even if the case is preserved across AXFR, it's =
not going to be preserved in query responses.  In order for this to be =
meaningful, we'd also need to change IXFR, DDNS, and who knows what =
else.

This also (to me, at least) falls outside of the scope of a =
clarification, as I don't know of any servers that do this currently.  =
Maybe the right solution is to remove this from axfr-clarify, and create =
a document clarifying name compression in general (if there is a =
compelling reason to make this change at all).

Brian

> At 13:28 -0800 1/5/10, Brian Wellington wrote:
>> I generally approve of the document going forward, except for =
comments on section 3.4.
>>=20
>> The text:
>>=20
>>  Name compression in an AXFR message MUST preserve the case of the
>>  original domain name.
>>=20
>> is unclear, and seems to make incorrect assumptions about general =
name
>> server behavior.  With respect to AXFR, the relevant point is that =
name
>> compression preserve the case of the domain name as known by the name
>> server, which may or may not be the original domain name as =
configured
>> by the zone operator.
>>=20
>> RFC 1034, section 3.1 (as referenced), says:
>>=20
>> When you receive a domain name or label, you should preserve its =
case.
>>=20
>> This says "should", so is not mandatory, and doesn't specifically =
refer
>> to AXFR, so any changes to this shouldn't be in an AXFR clarify
>> document.
>>=20
>> While most name server implementations attempt to preserve case =
whenever
>> possible, making full case preservation mandatory would be a major
>> undertaking.
>>=20
>> Authoritative name servers generally do not store fully qualified =
owner
>> names; they store names relative to the zone origin.  To use BIND as =
an
>> example, when configuring the zone "example.com.", it doesn't matter =
if
>> a record with the name "A.EXAMPLE.COM." is specified in the zone =
file;
>> the name will be stored relative to the zone name, and the original =
case
>> cannot be recovered for the purposes of AXFR.
>>=20
>> Additionally, authoritative name servers generally do not store a
>> separate copy of the owner name for each record associated with it.  =
So,
>> if records are present for "abc.example.com.", "ABC.example.com.", =
and
>> "aBc.example.com.", there is no way to transmit each record with its
>> original case.
>>=20
>> If there is a "MUST" requirement for servers to fully preserve case =
of
>> all records, that should be in a new general clarification document
>> (which I would think was a bad idea), not a clarification of AXFR.
>>=20
>> Brian
>=20
> --=20
> =
-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D=
-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-
> Edward Lewis
> NeuStar                    You can leave a voice message at =
+1-571-434-5468
>=20
> As with IPv6, the problem with the deployment of frictionless surfaces =
is
> that they're not getting traction.



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Date: Wed, 6 Jan 2010 15:49:08 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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On Wed, Jan 06, 2010 at 12:24:23PM -0800, Brian Wellington wrote:
> 
> On Jan 6, 2010, at 11:59 AM, Edward Lewis wrote:
> 
> > But, consider this too - "original" was probably the wrong term to use, as I was thinking "original wrt AXFR server" and not original wrt zone admin (aka DNSSEC's "original").
> 
> OK.  If the wording was clearer, it would be better.
> 

It seems to me the intention is that the server providing the AXFR
answer should provide the entire zone in exactly the case it holds the
data.  It should not transmit the zone such that case distinctions
that are in the server's copy of the zone are lost.  Is that right?
And if so, is just saying it that way enough of a clarification?

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Wed Jan  6 13:11:15 2010
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Date: Wed, 6 Jan 2010 15:52:40 -0500
To: Brian Wellington <brian.wellington@nominum.com>
From: Edward Lewis <Ed.Lewis@neustar.biz>
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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At 12:24 -0800 1/6/10, Brian Wellington wrote:

1.

>...but am having trouble figuring out why this is important...

2.

>I don't know of any servers that do this currently.

Good reasons for:

>remove this from axfr-clarify

and if there's a desire then:

>create a document clarifying name compression in general (if there 
>is a compelling reason to make this change at all).

;)

Thanks.
-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Edward Lewis
NeuStar                    You can leave a voice message at +1-571-434-5468

As with IPv6, the problem with the deployment of frictionless surfaces is
that they're not getting traction.


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From: Paul Vixie <vixie@isc.org>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
In-Reply-To: Your message of "Wed, 06 Jan 2010 15:49:08 EST." <20100106204907.GB8857@shinkuro.com> 
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> Date: Wed, 6 Jan 2010 15:49:08 -0500
> From: Andrew Sullivan <ajs@shinkuro.com>
> 
> It seems to me the intention is that the server providing the AXFR answer
> should provide the entire zone in exactly the case it holds the data.  It
> should not transmit the zone such that case distinctions that are in the
> server's copy of the zone are lost.  Is that right?  And if so, is just
> saying it that way enough of a clarification?

if that's the intent, then the language should explicitly require that dns
compression be done casefully, that is, if one is looking for a backpointer
to replace label "FooBar" then one should not accept the address of label
"foobar" or "FOOBAR" or any other except literally "FooBar".  this is in my
opinion a reasonable practice for AXFR but i would not like to see similar
requirements for normal queries.  (speaking now for 0x20.)


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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
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On Jan 6, 2010, at 1:12 PM, Paul Vixie wrote:

>> Date: Wed, 6 Jan 2010 15:49:08 -0500
>> From: Andrew Sullivan <ajs@shinkuro.com>
>>=20
>> It seems to me the intention is that the server providing the AXFR =
answer
>> should provide the entire zone in exactly the case it holds the data. =
 It
>> should not transmit the zone such that case distinctions that are in =
the
>> server's copy of the zone are lost.  Is that right?  And if so, is =
just
>> saying it that way enough of a clarification?
>=20
> if that's the intent, then the language should explicitly require that =
dns
> compression be done casefully, that is, if one is looking for a =
backpointer
> to replace label "FooBar" then one should not accept the address of =
label
> "foobar" or "FOOBAR" or any other except literally "FooBar".  this is =
in my
> opinion a reasonable practice for AXFR but i would not like to see =
similar
> requirements for normal queries.  (speaking now for 0x20.)

Unless I'm missing something, this is unrelated to 0x20.  0x20 requires =
that the case of the name in the question section of the response =
matches the case of the name in the question section of the query, and =
this name will never be compressed (as it's the first name in the =
packet).

Brian=


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Also starting to catch up after a few 'unwired' days ...

Firstly, thanks for all comments received so far
(and yet expecting more support for the document!).

Andrew:
    Apparently so many folks needed a longer nap from IETF,
    and the mid-week holiday today has obviously encouraged
    many people to not return to business until Monday (Jan 11).
    Running WGLCs over this period of time obviously turned out as
    not being the proper incentive to keep folks from vacation.  :-)
    Therefore, I suggest considering to extend the current WGLCs
    by a few days.

After quickly skimming over the messages, I agree with
most editorial suggestions supplied so far, but in a few
cases I'll try to find an even better alternative.

As the current active editor of the draft, I will sum up
on Friday the changes already done on my working copy and
present my current thoughts on a few remaining details
to be addressed after closure of the WGLC.

Regarding the case preservation discussion,
at Wed, 6 Jan 2010 15:49:08 -0500, Andrew Sullivan wrote:

> ...
>
> It seems to me the intention is that the server providing the AXFR
> answer should provide the entire zone in exactly the case it holds the
> data.  It should not transmit the zone such that case distinctions
> that are in the server's copy of the zone are lost.  Is that right?
> And if so, is just saying it that way enough of a clarification?
>
> A
>
> -- 
> Andrew Sullivan
> ajs@shinkuro.com
> Shinkuro, Inc.
>

Yes, that's the way I read the text.

The objective is to perferably not change the case of names in the
zone content served by the primary name server during transfer to
secondary authorities -- this essentially has nothing to do with
any case manipulation performed during loading of a primary zone
file (or similar, in other implementations), since the latter is
not visibly on-the-wire.

This goal obviously follows the principle of least surprise,
making sure that all authoritative servers synchronized via AXFR
will serve tha same zone content; this goal is independent of the
technical ways it is achieved, but it indeed has the consequences
for the application of name compression *for AXRF responses*
described in Section 3.4.

The case preservation from normal queries is related to the QNAME,
not to the name components served from the zone and not overlapping
the QNAME, which are always served "as is" from the zone content.

I'll craft short text to state the objective and include some of
the verbiage Paul Vixie has provided in response to Andrew's post.
Or does the previous consensus for that "MUST" not hold any more?

Kind regards,
  Alfred.



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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the DNS Extensions Working Group of the IETF.

	Title		: DNS Transport over TCP
	Author(s)	: R. Bellis
	Filename	: draft-ietf-dnsext-dns-tcp-requirements-02.txt
	Pages		: 8
	Date		: 2010-1-7
	
This document updates the requirements for the support of TCP as a
   transport protocol for DNS implementations.

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> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the DNS Extensions Working Group of the 
IETF.
> 
>    Title      : DNS Transport over TCP
>    Author(s)   : R. Bellis
>    Filename   : draft-ietf-dnsext-dns-tcp-requirements-02.txt
>    Pages      : 8
>    Date      : 2010-1-7
> 
> This document updates the requirements for the support of TCP as a
>    transport protocol for DNS implementations.

Changes in this version address feedback from the meeting in Hiroshima, 
concentrating on implementation rather than operations, and also comments 
received on-list.

Ray

--=_alternative 006899DB802576A4_=
Content-Type: text/html; charset="US-ASCII"

<tt><font size=2><br>
&gt; A New Internet-Draft is available from the on-line Internet-Drafts
<br>
&gt; directories.<br>
&gt; This draft is a work item of the DNS Extensions Working Group of the
IETF.<br>
&gt; <br>
&gt; &nbsp; &nbsp;Title &nbsp; &nbsp; &nbsp;: DNS Transport over TCP<br>
&gt; &nbsp; &nbsp;Author(s) &nbsp; : R. Bellis<br>
&gt; &nbsp; &nbsp;Filename &nbsp; : draft-ietf-dnsext-dns-tcp-requirements-02.txt<br>
&gt; &nbsp; &nbsp;Pages &nbsp; &nbsp; &nbsp;: 8<br>
&gt; &nbsp; &nbsp;Date &nbsp; &nbsp; &nbsp;: 2010-1-7<br>
&gt; &nbsp; &nbsp;<br>
&gt; This document updates the requirements for the support of TCP as a<br>
&gt; &nbsp; &nbsp;transport protocol for DNS implementations.<br>
</font></tt>
<br><tt><font size=2>Changes in this version address feedback from the
meeting in Hiroshima, concentrating on implementation rather than operations,
and also comments received on-list.</font></tt>
<br>
<br><tt><font size=2>Ray</font></tt>
<br>
--=_alternative 006899DB802576A4_=--


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From: Bob Halley <Bob.Halley@nominum.com>
To: IETF DNSEXT WG <namedroppers@ops.ietf.org>
Date: Thu, 7 Jan 2010 13:50:40 -0800
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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While I generally support draft-ietf-dnsext-axfr-clarify-12, I'd like to se=
e the comments made by Andreas Gustafsson and Brian Wellington addressed in=
 the draft before it progresses.

/Bob



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To: IETF DNSEXT WG <namedroppers@ops.ietf.org>
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I have reviewed draft-ietf-dnsext-dnssec-alg-allocation-00.txt  and draft-i=
etf-dnsext-dnssec-registry-fixes-01.txt and have no objections to them prog=
ressing.

/Bob



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Section 5.2 of this draft includes:

   A server MUST reject a dynamic update message that attempts to add a
   DNAME RR at a name that already has a CNAME RR or another DNAME RR
   associated with that name.

Is there a rationale for this text?  It's a pretty drastic departure =
from existing DDNS behavior.

RFC 2136, section 3.4.2.2 says:

   In the case of a CNAME Update RR and a non-CNAME Zone RRset or vice
   versa, ignore the CNAME Update RR, otherwise replace the CNAME Zone =
RR
   with the CNAME Update RR.

I don't see any reason why a CNAME would be replaced by an update with a =
non-DNAME record, but an update with a DNAME record would cause the =
update to fail.

RFC 2136, section 3.4.2.2 also says:

   In case of duplicate RDATAs (which for SOA RRs is always
   the case, and for WKS RRs is the case if the ADDRESS and PROTOCOL
   fields both match), the Zone RR is replaced by Update RR.

Section 2.4 (of this draft) defines DNAME as a singleton type, and while =
RFC 2136 doesn't use the word singleton, this text appears to be =
describing the same scenario.  As above, it's not clear why DNAME would =
be handled differently from other singleton types.

Additionally, if there is a reason for this change, the document should =
be more clear than "MUST reject"; that is, what the correct response =
code should be.

Brian=


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From owner-namedroppers@ops.ietf.org  Fri Jan  8 07:38:33 2010
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Date: Fri, 8 Jan 2010 10:30:44 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] Extending WGLCs by one week: closing 2010-01-15
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Dear colleagues,

We have two WGLCs open on three documents.  The original announcements
are at the following URLs:

http://ops.ietf.org/lists/namedroppers/namedroppers.2009/msg03149.html

http://ops.ietf.org/lists/namedroppers/namedroppers.2009/msg03148.html

Someone has pointed out to me that the LCs coincided with a longer
holiday period than I knew, and that some people may therefore have
missed the opportunity to offer their comments.

As a consequence, I hereby extend the WGLCs by one week, closing next
Friday 2010-01-15.  If you intend to review one or all of these
documents, and the additional week is not sufficient time for your
review, I implore you to contact me with a date by which you think you
could perform your review.

The LCs were originally scheduled to close today.  None of the
documents has so far received adequate review.  Each document that
fails to meet the threshold of five reviews supporting advancement
before its LC closes will be considered to be dead, and we will drop
them from our list of work items.  (As usual, five reviews is a
necessary but not sufficient condition.  If we had five supportive
reviews and 20 reviews arguing against, we would have to take that
into consideration.  Of course, it seems the chances of getting 25
reviews on any WG document are smaller than my chances of becoming a
Hollywood celebrity due to my sparkling wit and irresistable good
looks.)

It would be most unfortunate if these items did not receive adequate
review.

The AXFR clarifications document has been around for a long time, and
has had a substantial amount of work on it by its editors.  I think we
owe it to those people, our colleagues, to complete our work on the
document.  That means we need to complete the review.

The dnssec-registry-fixes document is a housekeeping document,
urgently needed.  It's really short -- only 6 pages, including all the
mandatory boilerplate -- and an ideal candidate for someone who is not
comfortable with a big protocol document like axfr-clarify.  If you
are one of the many people who comes to DNSEXT meetings but who seems
not to post reviews, I encourage you to dive into this one: it
shouldn't be hard to review, and if you find it too hard to understand
_that's very valuable feedback_.

The dnssec-alg-allocation document is even shorter, at only 5 pages
including all the boilerplate.  It changes the rules about algorithm
assignment, and proposes a mechanism for avoiding exhaustion of the
number space.  Several people said during the GOST discussions that
they would as soon have waited for this procedure to be in place; that
suggested to me, but did not confirm, that they had read the proposal
and supported it.  If that's true, all those people need do is speak
up.  Again, this is an excellent document for people who are often
quiet on this mailing list to tackle, because you don't really need to
understand the detailed history of the DNS protocol and various
implementations in order to understand this document and its
implications.

If you think any of the drafts should _not_ be advanced, that is also
useful feedback during WGLC.  It is important that we get some
response, because in the absence of such response we have to conclude
that the WG isn't interested in actually working on its work items.
If we are forced to that conclusion, we will have to ask ourselves
whether it is reasonable to continue our existence.

Best regards,

Andrew (sheperd for the documents in question)

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Fri Jan  8 07:39:56 2010
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Date: Fri, 8 Jan 2010 10:36:21 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
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Subject: [dnsext] WG operation survey
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Dear colleagues,

Olafur and I put together a little survey of WG participants to
understand how we are doing.  If you have an opinion on this matter,
it is welcome.  We are aware of the shortcomings of a self-selected
sample such as this, but we'll take the responses seriously.

The survey is at <http://www.surveymonkey.com/s/KR2MP3J>.  It's five
questions long.

There are questions on the WG operation, questions about each of the
co-Chairs performance, and a question about the WG's future.

We would appreciate your responses.  We'll leave the survey open until
2010-02-12.

Thanks,

Andrew and Olafur.

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Fri Jan  8 09:03:17 2010
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From: "Rose, Scott W." <scott.rose@nist.gov>
To: "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
Date: Fri, 8 Jan 2010 11:54:42 -0500
Subject: Re: [dnsext] Reminder: WGLC in process
Thread-Topic: [dnsext] Reminder: WGLC in process
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I have read over draft-ietf-dnsext-dnssec-alg-allocation-00.txt  and do not=
 have any objections to it progressing.  I am in favor of it.

Scott


On 1/4/10 5:23 PM, "Andrew Sullivan" <ajs@shinkuro.com> wrote:

Dear colleagues,

This is a reminder that we have two WGLC in process.  Both close on Friday.

We have had a too-small number of reviews for the axfr-clarify
document.  Please review it.

The silence on the procedural documents to fix the registry and change
the rules for algorithm number assignment has been deafening.  More
than one person suggested, during LC on the GOST assignment, that we
could wait for the procedural changes to come into place.  It would be
nice if at least those who thought those procedural changes would be
helpful would now review those documents.

Thanks and best for 2010,

Andrew

--
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.



=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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<FONT FACE=3D"Calibri, Verdana, Helvetica, Arial"><SPAN STYLE=3D'font-size:=
11pt'>I have read over draft-ietf-dnsext-dnssec-alg-allocation-00.txt &nbsp=
;and do not have any objections to it progressing. &nbsp;I am in favor of i=
t.<BR>
<BR>
Scott<BR>
<BR>
<BR>
On 1/4/10 5:23 PM, &quot;Andrew Sullivan&quot; &lt;<a href=3D"ajs@shinkuro.=
com">ajs@shinkuro.com</a>&gt; wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE=3D"Calibri, Verdana, Helvetica, Arial"=
><SPAN STYLE=3D'font-size:11pt'>Dear colleagues,<BR>
<BR>
This is a reminder that we have two WGLC in process. &nbsp;Both close on Fr=
iday.<BR>
<BR>
We have had a too-small number of reviews for the axfr-clarify<BR>
document. &nbsp;Please review it.<BR>
<BR>
The silence on the procedural documents to fix the registry and change<BR>
the rules for algorithm number assignment has been deafening. &nbsp;More<BR=
>
than one person suggested, during LC on the GOST assignment, that we<BR>
could wait for the procedural changes to come into place. &nbsp;It would be=
<BR>
nice if at least those who thought those procedural changes would be<BR>
helpful would now review those documents.<BR>
<BR>
Thanks and best for 2010,<BR>
<BR>
Andrew<BR>
<BR>
--<BR>
Andrew Sullivan<BR>
<a href=3D"ajs@shinkuro.com">ajs@shinkuro.com</a><BR>
Shinkuro, Inc.<BR>
<BR>
<BR>
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<BR>
Scott Rose<BR>
NIST<BR>
<a href=3D"scottr@nist.gov">scottr@nist.gov</a><BR>
ph: +1 301-975-8439<BR>
Google Voice: +1-571-249-3671<BR>
<BR>
<a href=3D"http://www.dnsops.gov/">http://www.dnsops.gov/</a><BR>
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References: <20091218184216.GF49362@shinkuro.com> <20091219172214.GF52726@shinkuro.com> <19259.31457.580958.759743@guava.gson.org>
Date: Fri, 8 Jan 2010 13:10:14 -0500
To: Andreas Gustafsson <gson@araneus.fi>
From: Edward Lewis <Ed.Lewis@neustar.biz>
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
Cc: namedroppers@ops.ietf.org
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I had completely missed these comments until Bob mentioned you had 
made them.  (Lost in the 
end-of-the-year-while-I-was-on-vacation-pile-and-it-wasn't-in-my-in-box-too.)

At 18:08 +0200 12/30/09, Andreas Gustafsson wrote:

>I don't think it makes sense to talk about a "0 message response" as a
>type of response distinct from that of immediately closing the TCP
>connection (as discussed in section 2.3).

Other than that, the comments are pretty much no-brainers to adopt. 
This one I had to think about a bit though, even if ultimately I 
agree.

I suppose that if the server isn't going to respond yet keeps the 
connection open for other traffic, then it's the client that just 
hangs around.  Perhaps there's never a case where a server would 
continue to accept other traffic from a client yet let an AXFR query 
go un-answered (even if refused).

Ultimately, a client ought to have a time-out, where it gives up on 
hearing the transfer, I suppose.  And I think this is a parameter in 
at least one implementation.  So I guess it seems reasonable to drop 
this - but from the perspective of an implementer, shouldn't they 
know that this could happen?  Or is that covered elsewhere?

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Edward Lewis
NeuStar                    You can leave a voice message at +1-571-434-5468

As with IPv6, the problem with the deployment of frictionless surfaces is
that they're not getting traction.


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From: Paul Wouters <paul@xelerance.com>
To: Andrew Sullivan <ajs@shinkuro.com>
cc: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Extending WGLCs by one week: closing 2010-01-15
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On Fri, 8 Jan 2010, Andrew Sullivan wrote:

> We have two WGLCs open on three documents.  The original announcements
> are at the following URLs:
>
> http://ops.ietf.org/lists/namedroppers/namedroppers.2009/msg03149.html

I have read draft-ietf-dnsext-dnssec-alg-allocation-00.txt and
draft-ietf-dnsext-dnssec-registry-fixes-01.txt and support both documents
going forward.

> http://ops.ietf.org/lists/namedroppers/namedroppers.2009/msg03148.html

I am not familiar enough with the protocol details of AXFR to give this
document a proper review.

Paul


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From owner-namedroppers@ops.ietf.org  Fri Jan  8 12:34:01 2010
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From: bmanning@vacation.karoshi.com
To: Edward Lewis <Ed.Lewis@neustar.biz>
Cc: Andreas Gustafsson <gson@araneus.fi>, namedroppers@ops.ietf.org
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
Message-ID: <20100108202507.GB12425@vacation.karoshi.com.>
References: <20091218184216.GF49362@shinkuro.com> <20091219172214.GF52726@shinkuro.com> <19259.31457.580958.759743@guava.gson.org> <a06240801c76d240d759c@[0.0.0.0]>
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On Fri, Jan 08, 2010 at 01:10:14PM -0500, Edward Lewis wrote:
> I had completely missed these comments until Bob mentioned you had 
> made them.  (Lost in the 
> end-of-the-year-while-I-was-on-vacation-pile-and-it-wasn't-in-my-in-box-too.)
> 
> At 18:08 +0200 12/30/09, Andreas Gustafsson wrote:
> 
> >I don't think it makes sense to talk about a "0 message response" as a
> >type of response distinct from that of immediately closing the TCP
> >connection (as discussed in section 2.3).
> 
> Other than that, the comments are pretty much no-brainers to adopt. 
> This one I had to think about a bit though, even if ultimately I 
> agree.
> 
> I suppose that if the server isn't going to respond yet keeps the 
> connection open for other traffic, then it's the client that just 
> hangs around.  Perhaps there's never a case where a server would 
> continue to accept other traffic from a client yet let an AXFR query 
> go un-answered (even if refused).

	actually, the server consumes resource to keep the connection
	open, even if at a higher layer it is not going to respond; e.g.
	the server just "hangs around" too.  and it certainly can open
	new connection requests from that (or other) client(s) while
	waiting.

> Ultimately, a client ought to have a time-out, where it gives up on 
> hearing the transfer, I suppose.  And I think this is a parameter in 
> at least one implementation.  So I guess it seems reasonable to drop 
> this - but from the perspective of an implementer, shouldn't they 
> know that this could happen?  Or is that covered elsewhere?

	TCP does have a timeout option and the original DNS spec
	sez to close after a 120second window.

> Edward Lewis
> NeuStar                    You can leave a voice message at +1-571-434-5468
> 
				for whom?

--bill


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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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At Thu, 7 Jan 2010 00:51:25 +0100 (MEZ), <ah@TR-Sys.de> wrote:

> As the current active editor of the draft, I will sum up
> on Friday the changes already done on my working copy and
> present my current thoughts on a few remaining details
> to be addressed after closure of the WGLC.


Given the extended time frame for the WGLC per Andrew's message ...
  http://ops.IETF.ORG/lists/namedroppers/namedroppers.2009/msg03249.html

... the additional comments now coming in (thanks!), ...
and other (unrelated) urgent obligations,
I defer this sum-up report to Monday.

This will allow me to catch up with more comments and resulting
changes to the draft (already done and still to be done).

  Alfred.



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On Jan 8, 2010, at 7:30 AM, Andrew Sullivan wrote:

> The dnssec-registry-fixes document is a housekeeping document,
> urgently needed.=20

I approve of this draft, with one minor comment.  The text contains:

  This column will contain the current implementation status of the =
given algorithm.

I don't think "implementation" is the correct word to use, since it's =
not talking about implementations, it's talking about recommendations =
and/or requirements.

> The dnssec-alg-allocation document is even shorter, at only 5 pages
> including all the boilerplate.  It changes the rules about algorithm
> assignment, and proposes a mechanism for avoiding exhaustion of the
> number space. =20

I approve of this draft.

Brian=


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From owner-namedroppers@ops.ietf.org  Sat Jan  9 13:46:37 2010
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Tackling these two docs separately.  First registry-fixes:

I think registry-fixes needs changes.

Adding the "requirement status" column to the registry is a fine idea 
(note the change in terminology suggested by Brian Wellington, which I 
support).

I'm concerned about the metric for making changes to the requirement
status: taken together, these two docs would allow an independent
submission (=RFC Editor stream document) to create a "MANDATORY"
algorithm.  I think that's bad.

It also looks like there's also a possibility that an informational 
RFC or independent submission could change the requirement status of 
new algorithms, even if those were defined on the standards track.  I 
propose the following:

"The requirement status for all new algorithms will be OPTIONAL unless 
a Standards Track document changes that (possibly including the 
Standards Track document defining the algorithm).  Only a Standards 
Track document may make an algorithm ENCOURAGED or MANDATORY or remove 
the MANDATORY or ENCOURAGED designation."

This suggests giving IANA a more complicated assignment metric for 
this registry: "assignments" are RFC Required, but changes in the 
requirement status field are still "Standards Action".

I'm also wondering where the proposed requirement status entries came 
from.  For instance, RSA/SHA-256 is shown as OPTIONAL, but RFC5702 
uses SHOULD, which suggests the term (per 
ogud-iana-protocol-maintenance) should be ENCOURAGED. 
(dnssec-bis-updates-09 also says this, in Section 2.)  Similarly, I'm 
not recalling that we've issued any document declaring RSA/MD5 
OBSOLETE.  Making that change here is fine, but it should be called 
out as a change.  And if these two are off, then are there errors 
elsewhere?

-- Sam


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From: "Greg Daley" <gdaley@netstarnetworks.com>
To: <namedroppers@ops.ietf.org>
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A new draft has been submitted which attempts to provide the=20
priority and load balancing control of SRV (and MX) records to
host lookups, without explicit service specification.

This is an early phase experimental mechanism based on SRV RR,
with modified client semantics. Details are listed below:

Authors:

  Greg Daley=20
  Raymond Ng

Title:  =20
   Use of DNS SRV records for host selection

URL:
   http://tools.ietf.org/html/draft-daley-dnsext-host-srv-00

Abstract:

   Where multiple application servers are able to receive inbound
   connections from clients, it is desirable provide some policy control
   over client behaviour.  This specification allows application service
   providers to provide addresses of multiple servers in response to DNS
   queries, while specifying failover and load balancing behaviours.

   Multiple servers are specified using existing protocol mechanisms for
   DNS Service records (SRV).  An experimental record definition is
   described, which can be implemented on existing systems.

Greg Daley
NetStar Australia Pty Ltd

E-mail: gdaley _at_ netstarnetworks.com
Mobile: +61 401 772 770
Direct: +61 3 8532 4042


From owner-namedroppers@ops.ietf.org  Sun Jan 10 19:09:53 2010
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Subject: Re: [dnsext] WG meeting or interim meeting about "name equivalence"
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Andrew Sullivan wrote:
> If we were to
> do this, we would aim for mid-February.  It would probably happen at
> about 10:00 EST, because that seems to provide _fairly_ global
> availability even though it inconveniences just about everyone (we are
> painfully aware that Olafur and I get off easy under this suggestion,
> but if we move it earlier it's too early for the US West Coast and if
> we move it any later it's way too late for anyone in the broad
> Asia-Pacific region, whose residents have a significant stake in one
> aspect of this issue).

Please use GMT to for proposing time. It's hard for people to relate to
your local time. 10:00 EST translates to 15:00 GMT.

My counter to this especially if it is important for Asia-Pacific region
is to move it to 22:00 GMT which would be much better for them.

Danny

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From owner-namedroppers@ops.ietf.org  Sun Jan 10 19:39:38 2010
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As I mentioned earlier Danny, there are one or more use cases for "idn 
equivalence(s)", however, non-latin IDNs extend to UTC+2 (Athens), and 
this does not exhaust the set of use cases.

Agree on the GMT vs local-to-foo point.

Eric


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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 01/09/2010 07:21 PM, Samuel Weiler wrote:
>
> It also looks like there's also a possibility that an informational RFC
> or independent submission could change the requirement status of new
> algorithms, even if those were defined on the standards track.  I
> propose the following:
> 
> "The requirement status for all new algorithms will be OPTIONAL unless a
> Standards Track document changes that (possibly including the Standards
> Track document defining the algorithm).  Only a Standards Track document
> may make an algorithm ENCOURAGED or MANDATORY or remove the MANDATORY or
> ENCOURAGED designation."
> 

+1

> I'm also wondering where the proposed requirement status entries came
> from.  For instance, RSA/SHA-256 is shown as OPTIONAL, but RFC5702 uses
> SHOULD, which suggests the term (per ogud-iana-protocol-maintenance)
> should be ENCOURAGED. (dnssec-bis-updates-09 also says this, in Section
> 2.)  Similarly, I'm not recalling that we've issued any document
> declaring RSA/MD5 OBSOLETE.  Making that change here is fine, but it
> should be called out as a change.  And if these two are off, then are
> there errors elsewhere?
> 

+1 on both suggestions, assuming that for 2) you mean it should be
DISCOURAGED, or the text in section 4 should be removed since this would
make a new statement on algorithm strengths.

That prompted me to take a quick look at the normative-referenced but
still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
DISCOURAGED is MUST-implement-this but discouraged-to-use, while
ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
that i haven't followed discussion on that one at all, or seen it actually).

Should we even publish this draft (reg-fixes) before maintenance-words
is out? Not that I advocate more slowness in general, but it seems wrong
to make a standards track document that adds a column with values that
aren't defined yet...

And about alg-allocations, i withdraw my earlier opposition about the
reserved-for-testing allocations, and support this document going forward.

Jelte


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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001111129.MAA07811@TR-Sys.de>
Subject: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs. draft-ogud-iana-protocol-maintenance-words
To: jelte@isc.org, namedroppers@ops.ietf.org
Date: Mon, 11 Jan 2010 12:29:38 +0100 (MEZ)
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In the message archived at
<http://ops.IETF.ORG/lists/namedroppers/namedroppers.2010/msg00007.html>,
Jelte Jansen wrote:

> That prompted me to take a quick look at the normative-referenced but
> still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
> DISCOURAGED is MUST-implement-this but discouraged-to-use, while
> ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
> that i haven't followed discussion on that one at all, or seen it
> actually).
>
> Should we even publish this draft (reg-fixes) before maintenance-words
> is out? Not that I advocate more slowness in general, but it seems wrong
> to make a standards track document that adds a column with values that
> aren't defined yet...

Note that draft-ogud-iana-protocol-maintenance-words already is
in state PUBLICATION REQUESTED.  There have been a few discussions
early in December, and AFAICS, the responsible AD is waiting for a
revised draft version before issuing IETF LC, and Scott is working
on it.  (One particular procedural question raised was the intended
status, BCP vs. PS.)

So chances are good that draft-ogud-iana-protocol-maintenance-words
will be out for publication before any draft depending on it and
still in this WG can catch up towards publication.

The "MUST-implement" for DISCOURAGED has been discussed.  The
rationale so far was that an algorithm in this state will usually
previously have been ENCOURAGED or MANDATORY, and hence it is
expected that deployed implementations depend on it; to ensure
a smooth phasing out of such implementations without disruption,
it is wise to still require implementation of such algorithms.

Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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On 01/11/2010 12:29 PM, Alfred ï¿½ wrote:
> There have been a few discussions early in December,
> 

My google skills seem to be aware of it being monday today, and i
have a hard time finding that discussion, so let me apologize if
i am repeating arguments that have been made already.

> The "MUST-implement" for DISCOURAGED has been discussed.  The
> rationale so far was that an algorithm in this state will usually
> previously have been ENCOURAGED or MANDATORY, and hence it is
> expected that deployed implementations depend on it; to ensure
> a smooth phasing out of such implementations without disruption,
> it is wise to still require implementation of such algorithms.
> 

That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE, this
makes complete sense. However, if you take
ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a SHOULD
implement becomes a MUST implement, because we're trying to get rid of
the feature...

(and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually be
stronger than the current status. But OBSOLETE is also stronger in
another way. Either choice actually changes the current value, so the
document does make a 'new' statement about it)

Jelte
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From owner-namedroppers@ops.ietf.org  Mon Jan 11 04:28:34 2010
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I've reviewed the above draft and support it going forward. Some of  
the language though is clunky and could be improved:

In Section 2:

"For example, an algorithm might be sponsored by a government and use  
cryptography that has not been evaluated thoroughly enough to be able  
to be put on Standards Track.  Another example is that the algorithm  
might have an unclear intellectual property rights situation, and that  
prevents the algorithm from being put on Standards Track."

could be replaced by:

"For instance an algorithm may have IPR or other complications  
preventing it receiving the thorough evaluation needes for a Standards  
Track RFC.

"relatively rarely" (relative to what?) should be changed to  
"infrequently"

The sentence "Because.... half full." is very awkward. I suggest the  
replacement text below:

"To address concerns about the registry eventually filling up, the  
IETF SHOULD re-evaluate the requirements for entry into this registry  
no later than whenever 50% of the registry entries have been assigned."



From owner-namedroppers@ops.ietf.org  Mon Jan 11 04:30:40 2010
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From: "Rose, Scott W." <scott.rose@nist.gov>
To: Samuel Weiler <weiler@watson.org>, Andrew Sullivan <ajs@shinkuro.com>
CC: "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
Date: Mon, 11 Jan 2010 07:25:42 -0500
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
Thread-Topic: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
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On 1/9/10 1:21 PM, "Samuel Weiler" <weiler@watson.org> wrote:

> Tackling these two docs separately.  First registry-fixes:
>=20
> I think registry-fixes needs changes.
>=20
> Adding the "requirement status" column to the registry is a fine idea
> (note the change in terminology suggested by Brian Wellington, which I
> support).
>=20
> I'm concerned about the metric for making changes to the requirement
> status: taken together, these two docs would allow an independent
> submission (=3DRFC Editor stream document) to create a "MANDATORY"
> algorithm.  I think that's bad.
>=20
> It also looks like there's also a possibility that an informational
> RFC or independent submission could change the requirement status of
> new algorithms, even if those were defined on the standards track.  I
> propose the following:
>=20
> "The requirement status for all new algorithms will be OPTIONAL unless
> a Standards Track document changes that (possibly including the
> Standards Track document defining the algorithm).  Only a Standards
> Track document may make an algorithm ENCOURAGED or MANDATORY or remove
> the MANDATORY or ENCOURAGED designation."
>=20

Yeah, I thought about that while I was writing it, but never got around to
asking the WG for ideas/consensus.  I'll work that text in.

Part of the hold on the ogud-maintenance-words draft right now is the dual
use of OPTIONAL (RFC 2119 and the draft).  Suggestions were:  DESCRESIONARY=
,
ELECTIVE, or something else.  This isn't strictly a DNS issue.

> This suggests giving IANA a more complicated assignment metric for
> this registry: "assignments" are RFC Required, but changes in the
> requirement status field are still "Standards Action".
>=20
> I'm also wondering where the proposed requirement status entries came
> from.  For instance, RSA/SHA-256 is shown as OPTIONAL, but RFC5702
> uses SHOULD, which suggests the term (per
> ogud-iana-protocol-maintenance) should be ENCOURAGED.
> (dnssec-bis-updates-09 also says this, in Section 2.)  Similarly, I'm
> not recalling that we've issued any document declaring RSA/MD5
> OBSOLETE.  Making that change here is fine, but it should be called
> out as a change.  And if these two are off, then are there errors
> elsewhere?
>=20

The table is unchanged from the -00 draft which is
pre-ogud-iana-protocol-maintenance.  So those words didn't "exist" :)  Some
of the ones listed as "OPTIONAL" should be "ENCOURAGED".

Scott

> -- Sam
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




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From: "Rose, Scott W." <scott.rose@nist.gov>
To: Jelte Jansen <jelte@isc.org>, Samuel Weiler <weiler@watson.org>
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On 1/11/10 5:19 AM, "Jelte Jansen" <jelte@isc.org> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1

>=20
> +1 on both suggestions, assuming that for 2) you mean it should be
> DISCOURAGED, or the text in section 4 should be removed since this would
> make a new statement on algorithm strengths.
>=20
> That prompted me to take a quick look at the normative-referenced but
> still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
> DISCOURAGED is MUST-implement-this but discouraged-to-use, while
> ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
> that i haven't followed discussion on that one at all, or seen it actuall=
y).
>=20

We are using "DISCOURAGED" to mean it is in use, but the community is tryin=
g
to phase it out, so for backwards compatibility new implementations would
need to understand it, but shouldn't use it going forward (if possible).
While ENCOURAGED means it isn't widely used now, but the community thinks i=
t
is a good option/algorithm/whatever so this is the trial stage.  If no
problems are seen, expect it to become a new MANDATORY thing soon (for some
definition of 'soon').

> Should we even publish this draft (reg-fixes) before maintenance-words
> is out? Not that I advocate more slowness in general, but it seems wrong
> to make a standards track document that adds a column with values that
> aren't defined yet...
>=20

Since we would be using the new words here, I hate to publish this before
the ogud-iana-protocol-maintenance-words draft.  Maybe at the same time.
Hopefully the maintenance words draft will go quickly and this can follow.


Scott



> And about alg-allocations, i withdraw my earlier opposition about the
> reserved-for-testing allocations, and support this document going forward=
.
>=20
> Jelte
>=20
>=20
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
>=20
> iEYEARECAAYFAktK+04ACgkQ4nZCKsdOncXPZgCgrqAacH+0bcaLJbmiWX0ylE6O
> 22MAoJ/6UMwD/u1UhFj8DLlFtfY3TXCz
> =3Dx2xZ
> -----END PGP SIGNATURE-----
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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From owner-namedroppers@ops.ietf.org  Mon Jan 11 04:48:32 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001111243.NAA07982@TR-Sys.de>
Subject: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs. draft-ogud-iana-protocol-maintenance-words
To: jelte@isc.org
Date: Mon, 11 Jan 2010 13:43:04 +0100 (MEZ)
Cc: namedroppers@ops.ietf.org
In-Reply-To: <4B4B117C.50808@isc.org> from Jelte Jansen at Jan "11," 2010 "12:54:36" pm
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Jelte Jansen wrote:
> On 01/11/2010 12:29 PM, Alfred HÎnes wrote:
>> There have been a few discussions early in December,
> 
> My google skills seem to be aware of it being monday today, and i
> have a hard time finding that discussion, so let me apologize if
> i am repeating arguments that have been made already.

In the lack of a proper 'home' mailing list, at least my part of the
discussion of the maintenance-words draft has been off-list with the
authors (since the -00 draft), and the outcome is visible in the
diffs between the draft versions.
(See also my trailing remark below.)

> 
>> The "MUST-implement" for DISCOURAGED has been discussed.  The
>> rationale so far was that an algorithm in this state will usually
>> previously have been ENCOURAGED or MANDATORY, and hence it is
>> expected that deployed implementations depend on it; to ensure
>> a smooth phasing out of such implementations without disruption,
>> it is wise to still require implementation of such algorithms.
> 
> That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
> this makes complete sense. However, if you take
> ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
> SHOULD implement becomes a MUST implement, because we're trying
> to get rid of the feature...
> 
> (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
> RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually be
> stronger than the current status. But OBSOLETE is also stronger in
> another way. Either choice actually changes the current value, so the
> document does make a 'new' statement about it)

Well, I had purposely reported "the rationale so far".
Personally, I would equally well favor demoting the implementation
requirement for DISCOURAGED from "MUST" to "SHOULD".

I thought the expected IETF LC discussion on the IETF main list
would be the proper place for such discussion, since the scope
of that draft far exceeds the scope of DNSEXT. ...

> 
> Jelte

Kind regards,
  Alfred.



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<no-hat>

At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:
>Jelte Jansen wrote:
> > On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:
> >> There have been a few discussions early in December,
> >
> > My google skills seem to be aware of it being monday today, and i
> > have a hard time finding that discussion, so let me apologize if
> > i am repeating arguments that have been made already.
>
>In the lack of a proper 'home' mailing list, at least my part of the
>discussion of the maintenance-words draft has been off-list with the
>authors (since the -00 draft), and the outcome is visible in the
>diffs between the draft versions.
>(See also my trailing remark below.)
>
> >
> >> The "MUST-implement" for DISCOURAGED has been discussed.  The
> >> rationale so far was that an algorithm in this state will usually
> >> previously have been ENCOURAGED or MANDATORY, and hence it is
> >> expected that deployed implementations depend on it; to ensure
> >> a smooth phasing out of such implementations without disruption,
> >> it is wise to still require implementation of such algorithms.
> >
> > That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
> > this makes complete sense. However, if you take
> > ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
> > SHOULD implement becomes a MUST implement, because we're trying
> > to get rid of the feature...
> >
> > (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
> > RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually be
> > stronger than the current status. But OBSOLETE is also stronger in
> > another way. Either choice actually changes the current value, so the
> > document does make a 'new' statement about it)
>
>Well, I had purposely reported "the rationale so far".
>Personally, I would equally well favor demoting the implementation
>requirement for DISCOURAGED from "MUST" to "SHOULD".
>
>I thought the expected IETF LC discussion on the IETF main list
>would be the proper place for such discussion, since the scope
>of that draft far exceeds the scope of DNSEXT. ...
>
> >
> > Jelte
>
>Kind regards,
>   Alfred.

It is fine to have this discussion here for now,
is:

         ENCOURAGED --> OBSOLETE is better than going through DISCOURAGED.
         Olafur



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From: Samuel Weiler <weiler@watson.org>
To: Andrew Sullivan <ajs@shinkuro.com>
cc: namedroppers@ops.ietf.org
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
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[ Moderators note: Post was moderated, either because it was posted by
   a non-subscriber, or because it was over 20K.  
   With the massive amount of spam, it is easy to miss and therefore 
   delete relevant posts by non-subscribers. 
   Please fix your subscription addresses. ]

On Sat, 19 Dec 2009, Andrew Sullivan wrote:

> Please note that draft-ietf-dnsext-dnssec-alg-allocation-00.txt alters
> the way algorithm identifiers are assigned, and has a fail-safe
> provision in it to protect the number space as it starts to be
> depleted.  It is particularly important that the WG decide whether
> that provision is a good one and, if so, if it is set at the right
> level.

I'm concerned that the best way we've found, to date, of versioning 
the DNSSEC protocol is using algorithm numbers, and that we may find 
ourselves consuming more algorithm numbers for that purpose in the 
future That said, I'm content to let this change go through with some 
minor changes.

Consistent with my recommendation re: registry-fixed and requirements 
status, I'd like to see this document repeat my proposed changes: 
"Unless specified in a Standards Track RFC, new algorithms will have a 
requirements status of OPTIONAL.  Only a Standards Track RFC may set 
or change a requirements status of ENCOURAGED or MANDATORY."

And, in keeping with the proposed fail-safe, I'd like to see half of 
the registry marked as "reserved".  That at least reminds people to 
come back at read this doc at the appropriate point.

-- Sam


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Date: Mon, 11 Jan 2010 09:37:12 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] Planning for meetings
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Dear colleagues,

The response we received to our question about planning for meetings
seemed to lean mostly in the direction of scheduling a virtual
interim; several people also suggested that it will almost certainly
require a follow-up meeting in Anaheim.

Some of you may have noticed that Olafur already requested the Anaheim
session.  He is also attempting to set up a virtual meeting.  We're
aiming for the 16th or 17th of February, and have taken into account
the various suggestions about possible times other than 15:00 UTC.
For what it's worth, my experience with virtual meetings in BEHAVE
suggests to me that one hour is about the limit for how long they are
really effective.  We do not have any confirmation of dates or times
yet (nor even that the IESG will allow us to have the virtual
meeting), so this is just a warning of what we're attempting and not
an announcement of any meeting.

While we sort that out, we strongly encourage those who have proposals
in this area, however sketchy, to put together an Internet Draft,
submit it, and draw the WG's attention to it.

Thanks and best regards,

Andrew


-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


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From owner-namedroppers@ops.ietf.org  Mon Jan 11 07:17:21 2010
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From: Samuel Weiler <weiler@watson.org>
To: Jelte Jansen <jelte@isc.org>
cc: namedroppers@ops.ietf.org
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
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>> "The requirement status for all new algorithms will be OPTIONAL unless a
>> Standards Track document changes that (possibly including the Standards
>> Track document defining the algorithm).  Only a Standards Track document
>> may make an algorithm ENCOURAGED or MANDATORY or remove the MANDATORY or
>> ENCOURAGED designation."
>
> +1

Thank you.

I had misunderstood how ogud-iana-... defined "DISCOURAGED".  That 
definition is bizarre.  It we're going to use it, it seems that 
DISCOURAGED needs to go in the above list, too.  But I'd rather see us 
not use that bizarre definition, even if it means defining the terms 
ourselves in this document.

>> I'm also wondering where the proposed requirement status entries came
>> from.  ...  are
>> there errors elsewhere?
>
> +1 on both suggestions, assuming that ...

Independent of the particular suggestions, I was (and am) hoping that 
someone (Scott?) will make sure each of these line items is correct 
and document that (in this doc?).

> That prompted me to take a quick look at the normative-referenced but
> still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
> DISCOURAGED is MUST-implement-this but discouraged-to-use, while
> ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
> that i haven't followed discussion on that one at all, or seen it actually).

As above, this sounds bizarre to me.  So bizarre that I'm dubious 
about using these definitions.  Can we get by with defining our own 
terms in this doc, where necessary?

-- Sam


From owner-namedroppers@ops.ietf.org  Mon Jan 11 08:04:09 2010
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From: Olafur Gudmundsson <ogud@ogud.com>
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At 10:09 11/01/2010, Samuel Weiler wrote:
>>>"The requirement status for all new algorithms will be OPTIONAL unless a
>>>Standards Track document changes that (possibly including the Standards
>>>Track document defining the algorithm).  Only a Standards Track document
>>>may make an algorithm ENCOURAGED or MANDATORY or remove the MANDATORY or
>>>ENCOURAGED designation."
>>
>>+1
>
>Thank you.
>
>I had misunderstood how ogud-iana-... defined "DISCOURAGED".  That 
>definition is bizarre.  It we're going to use it, it seems that 
>DISCOURAGED needs to go in the above list, too.  But I'd rather see 
>us not use that bizarre definition, even if it means defining the 
>terms ourselves in this document.

send text.

>>>I'm also wondering where the proposed requirement status entries came
>>>from.  ...  are
>>>there errors elsewhere?
>>
>>+1 on both suggestions, assuming that ...
>
>Independent of the particular suggestions, I was (and am) hoping 
>that someone (Scott?) will make sure each of these line items is 
>correct and document that (in this doc?).
>
>>That prompted me to take a quick look at the normative-referenced but
>>still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
>>DISCOURAGED is MUST-implement-this but discouraged-to-use, while
>>ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
>>that i haven't followed discussion on that one at all, or seen it actually).
>
>As above, this sounds bizarre to me.  So bizarre that I'm dubious 
>about using these definitions.  Can we get by with defining our own 
>terms in this doc, where necessary?

If the definitions are useless and can not be used in this context
then it is dubious that the definitions can be used in a similar
context. The point of having the two drafts is for one to
have the practice and the other one demonstrating in practice that
a vocabulary is useful.

Lets fix the definitions,

         Olafur



>-- Sam
>



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From: "Rose, Scott W." <scott.rose@nist.gov>
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On 1/11/10 10:09 AM, "Samuel Weiler" <weiler@watson.org> wrote:
>>=20
>> +1 on both suggestions, assuming that ...
>=20
> Independent of the particular suggestions, I was (and am) hoping that
> someone (Scott?) will make sure each of these line items is correct
> and document that (in this doc?).
>=20

I will add that.  The most recently spec'ed algorithms (RSA/SHA-256 &
SHA-512) did not give any status, so I was going with the default OPTIONAL
unless there is some stronger group consensus to make it mandatory to
implement.

The basis was RFC 4034 for the basic algorithms.  RSA/SHA-256/512 were adde=
d
later so OPTIONAL.  I haven't heard a yay/nay for the others.

Scott


>> That prompted me to take a quick look at the normative-referenced but
>> still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
>> DISCOURAGED is MUST-implement-this but discouraged-to-use, while
>> ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
>> that i haven't followed discussion on that one at all, or seen it actual=
ly).
>=20
> As above, this sounds bizarre to me.  So bizarre that I'm dubious
> about using these definitions.  Can we get by with defining our own
> terms in this doc, where necessary?
>=20
> -- Sam
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




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Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and  draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
From: Donald Eastlake <d3e3e3@gmail.com>
To: Jelte Jansen <jelte@isc.org>
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On Mon, Jan 11, 2010 at 5:19 AM, Jelte Jansen <jelte@isc.org> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On 01/09/2010 07:21 PM, Samuel Weiler wrote:
> >
> > ...
>

> That prompted me to take a quick look at the normative-referenced but
> still very draft-y draft-ogud-iana-protocol-maintenance-words-02.
> DISCOURAGED is MUST-implement-this but discouraged-to-use, while
> ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note
> that i haven't followed discussion on that one at all, or seen it
> actually).
>

I suggest changing to the notation used in at least some security RFCs: If
the idea is to give the the current estimate of the direction of change in
the implementation requirement, when that estimate is certain enough, then
just do that explicitly. A suffix "+" indicates that the implementation
requirement is likely to get stronger. A minus, the opposite. No suffix is
required and none would be specified unless there was judged to be
reasonable expectation that it would change reasonably soon.

So, instead of "DISCOURAGED", you can have MUST- if it was mandatory and is
expected to change to SHOULD or worse, or SHOULD- if it was SHOULD and
expected to change to MAY or worse. So something expected to become
mandatory would normally be SHOULD+ and if some problem is encountered
before it is changed to mandatory, there is no problem putting thought a
change to strip the "+" or to just change it to MAY or MUST NOT or
whatever...

I suppose I should go post this directly to the
ogud-iana-protocol-maintenance-words draft...

Thanks,
Donald


> Should we even publish this draft (reg-fixes) before maintenance-words
> is out? Not that I advocate more slowness in general, but it seems wrong
> to make a standards track document that adds a column with values that
> aren't defined yet...
>
> And about alg-allocations, i withdraw my earlier opposition about the
> reserved-for-testing allocations, and support this document going forward.
>
> Jelte
>
>

--0016e6d566adbfbfa7047ce8a34f
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<div class=3D"gmail_quote">On Mon, Jan 11, 2010 at 5:19 AM, Jelte Jansen <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:jelte@isc.org">jelte@isc.org</a>&gt;<=
/span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex;">
-----BEGIN PGP SIGNED MESSAGE-----<br>
Hash: SHA1<br>
<div class=3D"im"><br>
On 01/09/2010 07:21 PM, Samuel Weiler wrote:<br>
&gt;<br>
&gt; ...</div></blockquote><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br>
That prompted me to take a quick look at the normative-referenced but<br>
still very draft-y draft-ogud-iana-protocol-maintenance-words-02.<br>
DISCOURAGED is MUST-implement-this but discouraged-to-use, while<br>
ENCOURAGED is SHOULD-implement-this. That first one sounds wrong (note<br>
that i haven&#39;t followed discussion on that one at all, or seen it actua=
lly).<br></blockquote><div><br></div><div>I suggest changing to the notatio=
n used in at least some security RFCs: If the idea is to give the the curre=
nt estimate of the direction of change in the implementation requirement, w=
hen that estimate is certain enough, then just do that explicitly. A suffix=
 &quot;+&quot; indicates that the implementation requirement is likely to g=
et stronger. A minus, the opposite. No suffix is required and none would be=
 specified unless there was judged to be reasonable expectation that it wou=
ld change reasonably soon.</div>
<div><br></div><div>So, instead of &quot;DISCOURAGED&quot;, you can have MU=
ST- if it was mandatory and is expected to change to SHOULD or worse, or SH=
OULD- if it was SHOULD and expected to change to MAY or worse. So something=
 expected to become mandatory would normally be SHOULD+ and if some problem=
 is encountered before it is changed to mandatory, there is no problem putt=
ing thought a change to strip the &quot;+&quot; or to just change it to MAY=
 or MUST NOT or whatever...</div>
<div><br></div><div>I suppose I should go post this directly to the ogud-ia=
na-protocol-maintenance-words draft...</div><div><br></div><div>Thanks,</di=
v><div>Donald</div><div>=A0</div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Should we even publish this draft (reg-fixes) before maintenance-words<br>
is out? Not that I advocate more slowness in general, but it seems wrong<br=
>
to make a standards track document that adds a column with values that<br>
aren&#39;t defined yet...<br>
<br>
And about alg-allocations, i withdraw my earlier opposition about the<br>
reserved-for-testing allocations, and support this document going forward.<=
br>
<br>
Jelte<br>
<br></blockquote></div>

--0016e6d566adbfbfa7047ce8a34f--


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Subject: Re: [dnsext] Use of DNS SRV records for host selection
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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Replying off list was not intentional, bringing this back on-list :-)

2010/1/11 Greg Daley <gdaley@netstarnetworks.com>:
> Hi Colm,
>
> You didn't respond on the list. =A0Was this intentional?
>
> If not, could you please make any responses to the list,
> so that there's a record of why changes were made.
>
> Answers inline below:
>
>> -----Original Message-----
>> From: Colm MacC=E1rthaigh [mailto:colm@allcosts.net]
>> Sent: Tuesday, 12 January 2010 2:49 AM
>> To: Greg Daley
>> Subject: Re: [dnsext] Use of DNS SRV records for host selection
>>
>> On Mon, Jan 11, 2010 at 1:01 AM, Greg Daley
>> <gdaley@netstarnetworks.com> wrote:
>> > URL:
>> > =A0 http://tools.ietf.org/html/draft-daley-dnsext-host-srv-00
>>
>> The underscore effectively subtracts one byte from the maximum
>> hostname length. Is there really a need for an underscore? In section
>> 4, what's a negative response? Is a CNAME/DNAME ok (and then the usual
>> following ) ? Negative response should probably be defined as a zero
>> number of answers, or similar.
>
> I will note that the underscore effectively reduces the length of the
> hostname due to the label length constraint.
>
> I do not know if there is a strict need for an underscore, but for
> this version of the draft wanted to be able to operate without
> modification to the SRV RFC 2782. =A0The obsoleted RFC 2052 had no
> underscores required, and that behaviour was explicitly changed in the
> revision.
>
> For hosts (rather than services), one could possibly implement SRV
> records to have the same name component as the A or AAAA record, but
> some implementations have an explicit (Service,Proto) tuple when
> creating SRV records (for example Windows Server 2008).
>
> I'm trying to determine the utility of the system first and foremost
> (rather than requiring server modifications).
>
> The SRV record contains only a Target field, which is required to
> have a host lookup (such as A or AAAA), not allowed to be an alias
> (CNAME or DNAME).

I merely meant if this pattern was valid;

question;      _foo._host.example.com IN SRV
answer:        _foo._host.example.com IN CNAME _bar._host.example.com

...

_bar._host.example.com IN SRV

I think it should be, with regular CNAME/DNAME behaviour applying ...
but it's why I wondered if "negative response" should imply "zero
answers". It was just illustrative.

> You are right with regard to the Negative response, I will clarify
> this as 0 Answer RRs.
>
>
>> Labels can contain dots (see RFC1035 5.1). It feels like the hostname
>> should be the first label, and as simple as that. Dot-splitting is
>> more complicated.
>
> Thanks, as you point out, the description for \X states that "\." can
> be placed in a label.
>
> I was using the preferred syntax from S2.3.1 which indicates
> alphanumeric and hyphens compose labels:
>
> <domain> ::=3D <subdomain> | " "
> <subdomain> ::=3D <label> | <subdomain> "." <label>
> <label> ::=3D <letter> [ [ <ldh-str> ] <let-dig> ]
> <ldh-str> ::=3D <let-dig-hyp> | <let-dig-hyp> <ldh-str>
> <let-dig-hyp> ::=3D <let-dig> | "-"
>
> I will try to stick to hostname/domainname in descriptions.
>
> There would seem to be a divergence then from having short unstructured
> Service labels, as are currently defined for SRV, and the hostname (label=
)
> element which could contain embedded "."
>
> This only matters where the host SRV record is required to take a
> particular structure with underscores for the _Protocol element.

I just think it will be easier for implementors if when passed;

   "foo\.bar.example.com"

that the the lookup is for;

  _foo\.bar._host.example.com

rather than

  _foo._host.bar.example.com

it's one boundary case with the existing language. DNS resolvers and
clients can typically avoid text processing, but as-defined, the
language of the I-D would require string manipulation.

>> Lastly, I'm not sure of the usefulness of the example records
>> section, the rest of the document is fairly explanatory.
>
> Thanks for that. =A0I'm currently showing the idea to int-area people to =
see
> if this meets some of their provider aggregatable addressing requirements
> for IPv4/IPv6 transition. =A0If the sections are seen as extraneous to th=
eir
> understanding, I will remove them.
>
> Thanks for your feedback,

Thanks for the reply!

--=20
Colm


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From owner-namedroppers@ops.ietf.org  Mon Jan 11 19:40:18 2010
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Subject: RE: [dnsext] Use of DNS SRV records for host selection
Date: Tue, 12 Jan 2010 14:28:38 +1100
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Thread-Topic: [dnsext] Use of DNS SRV records for host selection
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From: "Greg Daley" <gdaley@netstarnetworks.com>
To: =?iso-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>, <namedroppers@ops.ietf.org>
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Hi Colm,=20

>> The SRV record contains only a Target field, which is required to
>> have a host lookup (such as A or AAAA), not allowed to be an alias
>> (CNAME or DNAME).
>=20
> I merely meant if this pattern was valid;
>=20
> question;      _foo._host.example.com IN SRV
> answer:        _foo._host.example.com IN CNAME _bar._host.example.com
>=20
> ...
>=20
> _bar._host.example.com IN SRV
>=20
> I think it should be, with regular CNAME/DNAME behaviour applying ...
> but it's why I wondered if "negative response" should imply "zero
> answers". It was just illustrative.

I believe for the initial response it would be possible to use
CNAME/DNAME, but would there then be a (restarted) SRV lookup on
the canonical name?

S5.1 of DNAME-bis specification identifies that the DNAME substitution
occurs before specific (MX,SRV,PTR) records:

http://tools.ietf.org/html/draft-ietf-dnsext-rfc2672bis-dname-18

For CNAME RFC2181 S10.3 is more explicit about this, where it discusses
MX and NS  records.  CNAME is included in the response with no =
additional
section processing, with the query potentially being restarted (with the
same QTYPE, and the CNAME substituted).

I don't think that these issues have been widely examined because for =
service
(not host) SRV records your would not typically have a (non-SRV) CNAME =
response.

I would guess that this CNAME behaviour is valid as well, although in
absence of guidance (other than that for the Target field of RFC2782),
people have been assuming that no CNAME record can be used in response =
to SRV
queries:

https://issues.asterisk.org/view.php?id=3D6314


>> Thanks, as you point out, the description for \X states  that "\."=20
>> can be placed in a label.
>>
>> I was using the preferred syntax from S2.3.1 which indicates
>> alphanumeric and hyphens compose labels:
>>
>> <domain> ::=3D <subdomain> | " "
>> <subdomain> ::=3D <label> | <subdomain> "." <label>
>> <label> ::=3D <letter> [ [ <ldh-str> ] <let-dig> ]
>> <ldh-str> ::=3D <let-dig-hyp> | <let-dig-hyp> <ldh-str>
>> <let-dig-hyp> ::=3D <let-dig> | "-"
>>
>> I will try to stick to hostname/domainname in descriptions.
>>
>> There would seem to be a divergence then from having short=20
>> unstructured Service labels, as are currently defined for SRV, and =
the=20
>> hostname (label) element which could contain embedded "."
>>
>> This only matters where the host SRV record is required to take a
>> particular structure with underscores for the _Protocol element.
>=20
> I just think it will be easier for implementors if when passed;
>=20
>    "foo\.bar.example.com"
>=20
> that the the lookup is for;
>=20
>   _foo\.bar._host.example.com
>=20
> rather than
>=20
>   _foo._host.bar.example.com
>=20
> it's one boundary case with the existing language. DNS resolvers and
> clients can typically avoid text processing, but as-defined, the
> language of the I-D would require string manipulation.

I will make sure that the text is updated.

Greg


From owner-namedroppers@ops.ietf.org  Mon Jan 11 19:56:07 2010
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Eric Brunner-Williams wrote:
> As I mentioned earlier Danny, there are one or more use cases for "idn
> equivalence(s)", however, non-latin IDNs extend to UTC+2 (Athens), and
> this does not exhaust the set of use cases.
> 

Yes, just add Russian, Spanish, Swedish, Finnish, Greek, Turkish, Arabic
and Hebrew and you have most of Europe and the Middle East just to name
a few...

Danny

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From owner-namedroppers@ops.ietf.org  Tue Jan 12 05:38:16 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001121328.OAA10018@TR-Sys.de>
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
To: namedroppers@ops.ietf.org
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Folks,
following up the discussion, here's a summary from the change log
in my working copy of draft-ietf-dnsext-axfr-clarify, prepared on
behalf of the WGLC comments received so far:

   Changes since draft version -12 :

   o  renamed trailing section "13. Editors' Addresses"
      to (unnumbered) "Authors' Addresses" to make happy
      idnits, the draft submission tool, and the RFC Editor;
      AH marked "Editor"; updated page 1 boilerplate
   o  Note d) in 2.1.1 shortened, content partially merged into 2.1.5,
      additional elaborations there; similar changes to 2.2.1 Note h)
      and 2.2.5  (based on comments from Andreas Gustafsson)
   o  Changed 1st para of 2.2 and deleted old Section 2.2.1;
      renumbered 2.2.2 thru 2.2.6 accordingly (now aligned with 2.1.*);
      added note in 4.1.1 to conserve some semantics of old 2.2.1
      (based on comment from Andreas Gustafsson and Bill Manning)
   o  Discussion of old single-RR-per-response behavior moved from
      3.1 to 2.2 and amended to describe the issue
      (based on comments from Andreas Gustafsson)
   o  New eloborations on AD and CD bits in 2.2.1 Note e)
      (based on comments from Andreas Gustafsson)
   o  clarified objective (copy zone as served literally to secondary)
      and consequences for case-preserving name compression in 3. and
      3.4; requirement level for the latter demoted to SHOULD
      (comments from Brian Wellington and discussion with others
      including Andrew Sullivan and Paul Vixie)
   o  various editorial fixes and improvements (comments from
      Mark Andrews, Andreas Gustafsson, Niall O'Reilly)
   o  updated Acknowledgements


Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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References: <4B4B117C.50808@isc.org> <201001111243.NAA07982@TR-Sys.de> <201001111306.o0BD633Y047128@stora.ogud.com>
Date: Tue, 12 Jan 2010 09:23:24 -0500
Message-ID: <1028365c1001120623m51ffee1g7f232e46d0d5d8f0@mail.gmail.com>
Subject: Re: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs.  draft-ogud-iana-protocol-maintenance-words
From: Donald Eastlake <d3e3e3@gmail.com>
To: Olafur Gudmundsson <ogud@ogud.com>
Cc: =?ISO-8859-1?Q?Alfred_H=CEnes?= <ah@tr-sys.de>, jelte@isc.org,  namedroppers@ops.ietf.org
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I think draft-ogud-iana-protocol-maintenance-words, at least in its current
state, tries to encode way too many different dimensions into way too few
words.

I believe the existing clear and well understood implementation requirement=
s
(MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) should be preserved. If you want
to add an indication of predicted future implementation requirement state,
that should be done by an explicit additional indicator, such as a suffix
"+" or "-". Trying use just a few single words and also implicitly encoding
operational requirements as well as implementation really seems like it is
trying to force things into too few a number of cubbyholes.

Donald

PS: Defining RESERVED and AVAILABLE is fine.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
Donald E. Eastlake 3rd   +1-508-634-2066 (home)
155 Beaver Street
Milford, MA 01757 USA
d3e3e3@gmail.com


On Mon, Jan 11, 2010 at 8:02 AM, Olafur Gudmundsson <ogud@ogud.com> wrote:

> <no-hat>
>
>
> At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:
>
>> Jelte Jansen wrote:
>> > On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:
>> >> There have been a few discussions early in December,
>> >
>> > My google skills seem to be aware of it being monday today, and i
>> > have a hard time finding that discussion, so let me apologize if
>> > i am repeating arguments that have been made already.
>>
>> In the lack of a proper 'home' mailing list, at least my part of the
>> discussion of the maintenance-words draft has been off-list with the
>> authors (since the -00 draft), and the outcome is visible in the
>> diffs between the draft versions.
>> (See also my trailing remark below.)
>>
>> >
>> >> The "MUST-implement" for DISCOURAGED has been discussed.  The
>> >> rationale so far was that an algorithm in this state will usually
>> >> previously have been ENCOURAGED or MANDATORY, and hence it is
>> >> expected that deployed implementations depend on it; to ensure
>> >> a smooth phasing out of such implementations without disruption,
>> >> it is wise to still require implementation of such algorithms.
>> >
>> > That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
>> > this makes complete sense. However, if you take
>> > ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
>> > SHOULD implement becomes a MUST implement, because we're trying
>> > to get rid of the feature...
>> >
>> > (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
>> > RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually b=
e
>> > stronger than the current status. But OBSOLETE is also stronger in
>> > another way. Either choice actually changes the current value, so the
>> > document does make a 'new' statement about it)
>>
>> Well, I had purposely reported "the rationale so far".
>> Personally, I would equally well favor demoting the implementation
>> requirement for DISCOURAGED from "MUST" to "SHOULD".
>>
>> I thought the expected IETF LC discussion on the IETF main list
>> would be the proper place for such discussion, since the scope
>> of that draft far exceeds the scope of DNSEXT. ...
>>
>> >
>> > Jelte
>>
>> Kind regards,
>>  Alfred.
>>
>
> It is fine to have this discussion here for now,
> is:
>
>        ENCOURAGED --> OBSOLETE is better than going through DISCOURAGED.
>        Olafur
>
>
>

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I think draft-ogud-iana-protocol-maintenance-words, at least in its current=
 state, tries to encode way too many different dimensions into way too few =
words.<div><br></div><div>I believe the existing clear and well understood =
implementation requirements (MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) shoul=
d be preserved. If you want to add an indication of predicted future implem=
entation requirement state, that should be done by an explicit additional i=
ndicator, such as a suffix &quot;+&quot; or &quot;-&quot;. Trying use just =
a few single words and also implicitly encoding operational requirements as=
 well as implementation really seems like it is trying to force things into=
 too few a number of cubbyholes.<div>
<br></div><div>Donald</div><div><br></div><div>PS: Defining RESERVED and AV=
AILABLE is fine.<br><div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br> Donald E. Eastlake 3rd =A0 +1-5=
08-634-2066 (home)<br> 155 Beaver Street<br> Milford, MA 01757 USA<br>
 <a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@gmail.com</a><br>
<br><br><div class=3D"gmail_quote">On Mon, Jan 11, 2010 at 8:02 AM, Olafur =
Gudmundsson <span dir=3D"ltr">&lt;<a href=3D"mailto:ogud@ogud.com">ogud@ogu=
d.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
&lt;no-hat&gt;<div><div></div><div class=3D"h5"><br>
<br>
At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Jelte Jansen wrote:<br>
&gt; On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:<br>
&gt;&gt; There have been a few discussions early in December,<br>
&gt;<br>
&gt; My google skills seem to be aware of it being monday today, and i<br>
&gt; have a hard time finding that discussion, so let me apologize if<br>
&gt; i am repeating arguments that have been made already.<br>
<br>
In the lack of a proper &#39;home&#39; mailing list, at least my part of th=
e<br>
discussion of the maintenance-words draft has been off-list with the<br>
authors (since the -00 draft), and the outcome is visible in the<br>
diffs between the draft versions.<br>
(See also my trailing remark below.)<br>
<br>
&gt;<br>
&gt;&gt; The &quot;MUST-implement&quot; for DISCOURAGED has been discussed.=
 =A0The<br>
&gt;&gt; rationale so far was that an algorithm in this state will usually<=
br>
&gt;&gt; previously have been ENCOURAGED or MANDATORY, and hence it is<br>
&gt;&gt; expected that deployed implementations depend on it; to ensure<br>
&gt;&gt; a smooth phasing out of such implementations without disruption,<b=
r>
&gt;&gt; it is wise to still require implementation of such algorithms.<br>
&gt;<br>
&gt; That&#39;s the thing, for the path MANDATORY-&gt;DISCOURAGED-&gt;OBSOL=
ETE,<br>
&gt; this makes complete sense. However, if you take<br>
&gt; ENCOURAGED-&gt;DISCOURAGED-&gt;OBSOLETE it&#39;s a bit weird; suddenly=
 a<br>
&gt; SHOULD implement becomes a MUST implement, because we&#39;re trying<br=
>
&gt; to get rid of the feature...<br>
&gt;<br>
&gt; (and in the case of RSA/MD5, to stay a bit on topic, i guess &#39;NOT<=
br>
&gt; RECOMMENDED&#39; becomes &#39;OBSOLETE&#39; because &#39;DISCOURAGED&#=
39; would actually be<br>
&gt; stronger than the current status. But OBSOLETE is also stronger in<br>
&gt; another way. Either choice actually changes the current value, so the<=
br>
&gt; document does make a &#39;new&#39; statement about it)<br>
<br>
Well, I had purposely reported &quot;the rationale so far&quot;.<br>
Personally, I would equally well favor demoting the implementation<br>
requirement for DISCOURAGED from &quot;MUST&quot; to &quot;SHOULD&quot;.<br=
>
<br>
I thought the expected IETF LC discussion on the IETF main list<br>
would be the proper place for such discussion, since the scope<br>
of that draft far exceeds the scope of DNSEXT. ...<br>
<br>
&gt;<br>
&gt; Jelte<br>
<br>
Kind regards,<br>
 =A0Alfred.<br>
</blockquote>
<br></div></div>
It is fine to have this discussion here for now,<br>
is:<br>
<br>
 =A0 =A0 =A0 =A0ENCOURAGED --&gt; OBSOLETE is better than going through DIS=
COURAGED.<br><font color=3D"#888888">
 =A0 =A0 =A0 =A0Olafur<br>
<br>
<br>
</font></blockquote></div><br></div></div></div>

--0016e6d5093191124f047cf865e2--


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To: "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
Date: Tue, 12 Jan 2010 09:54:05 -0500
Subject: [dnsext] DNAME, dynamic update and DNAME-bis
Thread-Topic: DNAME, dynamic update and DNAME-bis
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This is a re-opening of the previous DNAME and dynamic update issue.  This
message:
http://ops.ietf.org/lists/namedroppers/namedroppers.2009/msg03248.html

However, it seems to conflict with the resolution from the 2008 discussion
started here:
http://ops.ietf.org/lists/namedroppers/namedroppers.2008/msg00329.html

So the question posed to the WG is should the text be changed to the new
suggestion, or keep the current text as discussed in the 2008 discussion?

Scott
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
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Google Voice: +1-571-249-3671

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From owner-namedroppers@ops.ietf.org  Tue Jan 12 08:21:34 2010
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From: "Rose, Scott W." <scott.rose@nist.gov>
To: Donald Eastlake <d3e3e3@gmail.com>, Olafur Gud <ogud@ogud.com>, "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
Date: Tue, 12 Jan 2010 11:13:14 -0500
Subject: Re: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs. draft-ogud-iana-protocol-maintenance-words
Thread-Topic: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs. draft-ogud-iana-protocol-maintenance-words
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This draft came from the registry-fixes draft.  While going through the
docs, discussions, etc. I noticed that the word "mandatory" was never
defined and the other RFC 2119 keywords were too static in that there was n=
o
way to convey intent and possible future action.

We looked at the +/- and noticed that it wasn't formally defined in a
document and the words were re-defined in every doc they were in (usually
the same text).  Most non-crypto/security folks were confused of the use, s=
o
we thought it might be more readable to have set of new words for a more
formal meaning. The would obviously be a mapping from the use of +/- to the
newly defined terms.

Scott


On 1/12/10 9:23 AM, "Donald Eastlake" <d3e3e3@gmail.com> wrote:

> I think draft-ogud-iana-protocol-maintenance-words, at least in its curre=
nt
> state, tries to encode way too many different dimensions into way too few
> words.
>=20
> I believe the existing clear and well understood implementation requireme=
nts
> (MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) should be preserved. If you wan=
t to
> add an indication of predicted future implementation requirement state, t=
hat
> should be done by an explicit additional indicator, such as a suffix "+" =
or
> "-". Trying use just a few single words and also implicitly encoding
> operational requirements as well as implementation really seems like it i=
s
> trying to force things into too few a number of cubbyholes.
>=20
> Donald
>=20
> PS: Defining RESERVED and AVAILABLE is fine.
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
>  Donald E. Eastlake 3rd =A0 +1-508-634-2066 (home)
>  155 Beaver Street
>  Milford, MA 01757 USA
>  d3e3e3@gmail.com
>=20
>=20
> On Mon, Jan 11, 2010 at 8:02 AM, Olafur Gudmundsson <ogud@ogud.com> wrote=
:
>> <no-hat>
>>=20
>>=20
>> At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:
>>> Jelte Jansen wrote:
>>>> On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:
>>>>> There have been a few discussions early in December,
>>>>=20
>>>> My google skills seem to be aware of it being monday today, and i
>>>> have a hard time finding that discussion, so let me apologize if
>>>> i am repeating arguments that have been made already.
>>>=20
>>> In the lack of a proper 'home' mailing list, at least my part of the
>>> discussion of the maintenance-words draft has been off-list with the
>>> authors (since the -00 draft), and the outcome is visible in the
>>> diffs between the draft versions.
>>> (See also my trailing remark below.)
>>>=20
>>>>=20
>>>>> The "MUST-implement" for DISCOURAGED has been discussed. =A0The
>>>>> rationale so far was that an algorithm in this state will usually
>>>>> previously have been ENCOURAGED or MANDATORY, and hence it is
>>>>> expected that deployed implementations depend on it; to ensure
>>>>> a smooth phasing out of such implementations without disruption,
>>>>> it is wise to still require implementation of such algorithms.
>>>>=20
>>>> That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
>>>> this makes complete sense. However, if you take
>>>> ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
>>>> SHOULD implement becomes a MUST implement, because we're trying
>>>> to get rid of the feature...
>>>>=20
>>>> (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
>>>> RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually b=
e
>>>> stronger than the current status. But OBSOLETE is also stronger in
>>>> another way. Either choice actually changes the current value, so the
>>>> document does make a 'new' statement about it)
>>>=20
>>> Well, I had purposely reported "the rationale so far".
>>> Personally, I would equally well favor demoting the implementation
>>> requirement for DISCOURAGED from "MUST" to "SHOULD".
>>>=20
>>> I thought the expected IETF LC discussion on the IETF main list
>>> would be the proper place for such discussion, since the scope
>>> of that draft far exceeds the scope of DNSEXT. ...
>>>=20
>>>>=20
>>>> Jelte
>>>=20
>>> Kind regards,
>>>  =A0Alfred.
>>=20
>> It is fine to have this discussion here for now,
>> is:
>>=20
>>  =A0 =A0 =A0 =A0ENCOURAGED --> OBSOLETE is better than going through DIS=
COURAGED.
>>  =A0 =A0 =A0 =A0Olafur
>>=20
>>=20
>=20
>=20

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




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On 2010-01-11, at 07:22, Jim Reid wrote:

> I've reviewed the above draft and support it going forward. Some of =
the language though is clunky and could be improved:
>=20
> In Section 2:
>=20
> "For example, an algorithm might be sponsored by a government and use =
cryptography that has not been evaluated thoroughly enough to be able to =
be put on Standards Track.  Another example is that the algorithm might =
have an unclear intellectual property rights situation, and that =
prevents the algorithm from being put on Standards Track."
>=20
> could be replaced by:
>=20
> "For instance an algorithm may have IPR or other complications =
preventing it receiving the thorough evaluation needes for a Standards =
Track RFC.

Perhaps s/needes for a Standards Track RFC/required by the Standards =
Track/ with an informational xref to 2026.

> "relatively rarely" (relative to what?) should be changed to =
"infrequently"
>=20
> The sentence "Because.... half full." is very awkward. I suggest the =
replacement text below:
>=20
> "To address concerns about the registry eventually filling up, the =
IETF SHOULD re-evaluate the requirements for entry into this registry no =
later than whenever 50% of the registry entries have been assigned."

s/no later than whenever/as soon as/ also seems like it might enhance =
clarity.


Joe=


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From owner-namedroppers@ops.ietf.org  Tue Jan 12 11:29:56 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001121920.UAA10503@TR-Sys.de>
Subject: Re: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs.  draft-ogud-iana-protocol-maintenance-words
To: d3e3e3@gmail.com, scott.rose@nist.gov
Date: Tue, 12 Jan 2010 20:20:20 +0100 (MEZ)
Cc: namedroppers@ops.ietf.org
In-Reply-To: <1028365c1001120623m51ffee1g7f232e46d0d5d8f0@mail.gmail.com> from Donald Eastlake at Jan "12," 2010 "09:23:24" am
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Donald Eastlake wrote:

>> ...
>> I believe the existing clear and well understood implementation
>> requirements (MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) should be
>> preserved. If you want to add an indication of predicted future
>> implementation requirement state, that should be done by an
>> explicit additional indicator, such as a suffix "+" or "-".
>> Trying use just a few single words and also implicitly encoding
>> operational requirements as well as implementation really seems
>> like it is trying to force things into too few a number of
>> cubbyholes.

... and in his response, Scott W. Rose wrote:

> We looked at the +/- and noticed that it wasn't formally defined in
> a document and the words were re-defined in every doc they were in
> (usually the same text).  Most non-crypto/security folks were confused
> of the use, so we thought it might be more readable to have set of new
> words for a more formal meaning.  The would obviously be a mapping
> from the use of +/- to the newly defined terms.

Please note (this has been pointed out already) that in 2008,
draft-hoffman-additional-key-words-00  tried to establish these
"+"/"-" keywords, motivated by similar requirements from IPSECME,
TLS, PKIX, and SMIME WGs.  However, this effort did not socialize
with the IETF at large and, reportedly, the IESG in particular.

The trouble with the RFC 2119 keywords, and requirements language
in the IETF in general, is that -- unlike some other SDOs -- the IETF
does not specify complete "solutions" but protocol building blocks,
and that therefore the RFC 2119 keywords are always "relative to
the document" in which they are used, i.e.:
  if an only if an implementation adheres to RFC zzzz,
    then the "MUST"s and "SHOULD"s therein are normative for it.

All IETFers see RFC 2119 keywords in this vein, and in particular
they are seen as (almost) temporally invariate: you need a new
RFC updating RFC zzzz to change the requirement levels therein.

What is needed for guidance to implementations regarding crypto
agility however are requirement keywords at a higher, 'meta' level,
not bound to the specifications of the algorithmic building blocks.
The requirements inside these specifications (and thereby 'relative'
to these specifications) remain unchanged.

It is expected that these requirements at the meta level may change
much more rapidly than the IETF is able and/or willing to revise
major protocol documents that could legitimately contain such
cookbook-like requirements for subordinate crypto algorithms.

One objective of the effort with such keywords is to encourage
implementation an (at least) small-scale use of new algorithms to
ensure properly tested and ready-to-use implementations are getting
available for newer (hopefully stronger) algorithms, without
immediately declaring existing implementations as nonconformant.
This way, in case progresses in cryptanalysis and/or computing power
make it advisable to quickly phase out use of an older algorithm,
the operational shift to a newer algorithm is much more easily
to perform.

Therefore, it is desirable to use keywords for this purpose that
can be distinguished easily from the RFC 2119 keywords, and it is
necessary to have requirements levels that can easily be recognized
as transitory in nature and/or expressing expected evolution.

Time already is tight for the first important use case:
NIST has announced phasing out SHA-1 support in digital signature
methods within its scope,  by the end of this year (2010), IIRC.



Colophon

Please note that recent anecdotal evidence shows that even much
less 'deep' details in security protocols can cause trouble if the
transition to new specifications fulfilling improved requirements
is not managed properly.  Giving the market a strong incentive for
the implementation of new algorithms and data formats without
declaring the deployed base non-conformant immediately is a strong
policy.  Failing to do so incurs the risk of unexpected trouble
with poorly implementend and/or poorly tested code.

The original CCITT X.208 ASN.1 specification only contained a single
'built-in' standard "UTCTime" ASN.1 type for calendar date plus time,
and that contained only two decimal digits for the year.  Although
the Y2K problem already arrived on the horizon, the entire X.500 suite
and then the IETF PKIX specs were initially built on this data type
and did not use the better ASN.1 GeneralizedTime data type (using
4-digit years) specified in a more recent edition of X.208.

Until recently, based on the intent to conserve long-term stability
and standards-conformance of existing deployments, GeneralizedTime
was not made mandatory-to-implement.  Even RFC 5280 requires for
PKIX certificates:

  "Both notBefore and notAfter may be encoded as UTCTime or
   GeneralizedTime.
   CAs conforming to this profile MUST always encode certificate
   validity dates through the year 2049 as UTCTime; certificate
   validity dates in 2050 or later MUST be encoded as GeneralizedTime."

... but it made significant progress in requiring, for the first time,

  "Conforming applications MUST be able to process validity dates that
   are encoded in either UTCTime or GeneralizedTime."

RFC-to-be 5751 (S/MIME 3.2) will restate this essentially unchanged,
but with slightly better guidance for receiving agents.

IMHO, that is too conservative, and dangerous.

The recent Y2k01 bug in over 30 Mio. European payment chipcards
issued during the last ~two years reportedly is related to improper
support of validy date formats in the chipcards relative to calendar
dates in 2010 (and later).
(For the issue and its economical effects, see e.g.
  <http://www.h-online.com/security/news/item/Problems-obtaining-cash-from-German-ATMs-Update-894801.html>
and
  <http://www.h-online.com/security/news/item/EC-card-disaster-French-manufacturer-Gemalto-takes-responsibility-897991.html> ).


Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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References: <1028365c1001120623m51ffee1g7f232e46d0d5d8f0@mail.gmail.com> <C77209CA.A08A%scott.rose@nist.gov>
Date: Tue, 12 Jan 2010 15:00:18 -0500
Message-ID: <1028365c1001121200m50f7f1d2v41bb69f478c57e4c@mail.gmail.com>
Subject: Re: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs.  draft-ogud-iana-protocol-maintenance-words
From: Donald Eastlake <d3e3e3@gmail.com>
To: "Rose, Scott W." <scott.rose@nist.gov>
Cc: Olafur Gud <ogud@ogud.com>, "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
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Everyone will be confused by the new system at first, whether you use new
words or new "accents" like suffix "+" and "-". In fact, the main differenc=
e
would be that if you use new words, people will be more inclined to guess a=
t
their meaning and may guess wrong.

Forgetting about +/-, which I happen to like, my initial and main complaint
was trying to encode too many dimension into too few different words. I
don't particularly feel that that complaint has been answered...

Thanks,
Donald
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
Donald E. Eastlake 3rd   +1-508-634-2066 (home)
155 Beaver Street
Milford, MA 01757 USA
d3e3e3@gmail.com


On Tue, Jan 12, 2010 at 11:13 AM, Rose, Scott W. <scott.rose@nist.gov>wrote=
:

> This draft came from the registry-fixes draft.  While going through the
> docs, discussions, etc. I noticed that the word "mandatory" was never
> defined and the other RFC 2119 keywords were too static in that there was
> no
> way to convey intent and possible future action.
>
> We looked at the +/- and noticed that it wasn't formally defined in a
> document and the words were re-defined in every doc they were in (usually
> the same text).  Most non-crypto/security folks were confused of the use,
> so
> we thought it might be more readable to have set of new words for a more
> formal meaning. The would obviously be a mapping from the use of +/- to t=
he
> newly defined terms.
>
> Scott
>
>
> On 1/12/10 9:23 AM, "Donald Eastlake" <d3e3e3@gmail.com> wrote:
>
> > I think draft-ogud-iana-protocol-maintenance-words, at least in its
> current
> > state, tries to encode way too many different dimensions into way too f=
ew
> > words.
> >
> > I believe the existing clear and well understood implementation
> requirements
> > (MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) should be preserved. If you
> want to
> > add an indication of predicted future implementation requirement state,
> that
> > should be done by an explicit additional indicator, such as a suffix "+=
"
> or
> > "-". Trying use just a few single words and also implicitly encoding
> > operational requirements as well as implementation really seems like it
> is
> > trying to force things into too few a number of cubbyholes.
> >
> > Donald
> >
> > PS: Defining RESERVED and AVAILABLE is fine.
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
> >  Donald E. Eastlake 3rd   +1-508-634-2066 (home)
> >  155 Beaver Street
> >  Milford, MA 01757 USA
> >  d3e3e3@gmail.com
> >
> >
> > On Mon, Jan 11, 2010 at 8:02 AM, Olafur Gudmundsson <ogud@ogud.com>
> wrote:
> >> <no-hat>
> >>
> >>
> >> At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:
> >>> Jelte Jansen wrote:
> >>>> On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:
> >>>>> There have been a few discussions early in December,
> >>>>
> >>>> My google skills seem to be aware of it being monday today, and i
> >>>> have a hard time finding that discussion, so let me apologize if
> >>>> i am repeating arguments that have been made already.
> >>>
> >>> In the lack of a proper 'home' mailing list, at least my part of the
> >>> discussion of the maintenance-words draft has been off-list with the
> >>> authors (since the -00 draft), and the outcome is visible in the
> >>> diffs between the draft versions.
> >>> (See also my trailing remark below.)
> >>>
> >>>>
> >>>>> The "MUST-implement" for DISCOURAGED has been discussed.  The
> >>>>> rationale so far was that an algorithm in this state will usually
> >>>>> previously have been ENCOURAGED or MANDATORY, and hence it is
> >>>>> expected that deployed implementations depend on it; to ensure
> >>>>> a smooth phasing out of such implementations without disruption,
> >>>>> it is wise to still require implementation of such algorithms.
> >>>>
> >>>> That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
> >>>> this makes complete sense. However, if you take
> >>>> ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
> >>>> SHOULD implement becomes a MUST implement, because we're trying
> >>>> to get rid of the feature...
> >>>>
> >>>> (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
> >>>> RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually
> be
> >>>> stronger than the current status. But OBSOLETE is also stronger in
> >>>> another way. Either choice actually changes the current value, so th=
e
> >>>> document does make a 'new' statement about it)
> >>>
> >>> Well, I had purposely reported "the rationale so far".
> >>> Personally, I would equally well favor demoting the implementation
> >>> requirement for DISCOURAGED from "MUST" to "SHOULD".
> >>>
> >>> I thought the expected IETF LC discussion on the IETF main list
> >>> would be the proper place for such discussion, since the scope
> >>> of that draft far exceeds the scope of DNSEXT. ...
> >>>
> >>>>
> >>>> Jelte
> >>>
> >>> Kind regards,
> >>>   Alfred.
> >>
> >> It is fine to have this discussion here for now,
> >> is:
> >>
> >>         ENCOURAGED --> OBSOLETE is better than going through
> DISCOURAGED.
> >>         Olafur
> >>
> >>
> >
> >
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> Scott Rose
> NIST
> scottr@nist.gov
> ph: +1 301-975-8439
> Google Voice: +1-571-249-3671
>
> http://www.dnsops.gov/
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
>
>

--0016e6d7855364f05f047cfd1a88
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Everyone will be confused by the new system at first, whether you use new w=
ords or new &quot;accents&quot; like suffix &quot;+&quot; and &quot;-&quot;=
. In fact, the main difference would be that if you use new words, people w=
ill be more inclined to guess at their meaning and may guess wrong.<div>
<br></div><div>Forgetting about +/-, which I happen to like, my initial and=
 main complaint was trying to encode too many dimension into too few differ=
ent words. I don&#39;t particularly feel that that complaint has been answe=
red...</div>
<div><br></div><div>Thanks,</div><div>Donald<br clear=3D"all">=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
<br> Donald E. Eastlake 3rd =A0 +1-508-634-2066 (home)<br> 155 Beaver Stree=
t<br> Milford, MA 01757 USA<br> <a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@=
gmail.com</a><br>

<br><br><div class=3D"gmail_quote">On Tue, Jan 12, 2010 at 11:13 AM, Rose, =
Scott W. <span dir=3D"ltr">&lt;<a href=3D"mailto:scott.rose@nist.gov">scott=
.rose@nist.gov</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
This draft came from the registry-fixes draft. =A0While going through the<b=
r>
docs, discussions, etc. I noticed that the word &quot;mandatory&quot; was n=
ever<br>
defined and the other RFC 2119 keywords were too static in that there was n=
o<br>
way to convey intent and possible future action.<br>
<br>
We looked at the +/- and noticed that it wasn&#39;t formally defined in a<b=
r>
document and the words were re-defined in every doc they were in (usually<b=
r>
the same text). =A0Most non-crypto/security folks were confused of the use,=
 so<br>
we thought it might be more readable to have set of new words for a more<br=
>
formal meaning. The would obviously be a mapping from the use of +/- to the=
<br>
newly defined terms.<br>
<br>
Scott<br>
<div><div></div><div class=3D"h5"><br>
<br>
On 1/12/10 9:23 AM, &quot;Donald Eastlake&quot; &lt;<a href=3D"mailto:d3e3e=
3@gmail.com">d3e3e3@gmail.com</a>&gt; wrote:<br>
<br>
&gt; I think draft-ogud-iana-protocol-maintenance-words, at least in its cu=
rrent<br>
&gt; state, tries to encode way too many different dimensions into way too =
few<br>
&gt; words.<br>
&gt;<br>
&gt; I believe the existing clear and well understood implementation requir=
ements<br>
&gt; (MUST, SHOULD, MAY, SHOULD NOT, MUST NOT) should be preserved. If you =
want to<br>
&gt; add an indication of predicted future implementation requirement state=
, that<br>
&gt; should be done by an explicit additional indicator, such as a suffix &=
quot;+&quot; or<br>
&gt; &quot;-&quot;. Trying use just a few single words and also implicitly =
encoding<br>
&gt; operational requirements as well as implementation really seems like i=
t is<br>
&gt; trying to force things into too few a number of cubbyholes.<br>
&gt;<br>
&gt; Donald<br>
&gt;<br>
&gt; PS: Defining RESERVED and AVAILABLE is fine.<br>
&gt; =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D<br>
&gt; =A0Donald E. Eastlake 3rd =A0 +1-508-634-2066 (home)<br>
&gt; =A0155 Beaver Street<br>
&gt; =A0Milford, MA 01757 USA<br>
&gt; =A0<a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@gmail.com</a><br>
&gt;<br>
&gt;<br>
&gt; On Mon, Jan 11, 2010 at 8:02 AM, Olafur Gudmundsson &lt;<a href=3D"mai=
lto:ogud@ogud.com">ogud@ogud.com</a>&gt; wrote:<br>
&gt;&gt; &lt;no-hat&gt;<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;&gt; At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:<=
br>
&gt;&gt;&gt; Jelte Jansen wrote:<br>
&gt;&gt;&gt;&gt; On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:<br>
&gt;&gt;&gt;&gt;&gt; There have been a few discussions early in December,<b=
r>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; My google skills seem to be aware of it being monday today=
, and i<br>
&gt;&gt;&gt;&gt; have a hard time finding that discussion, so let me apolog=
ize if<br>
&gt;&gt;&gt;&gt; i am repeating arguments that have been made already.<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; In the lack of a proper &#39;home&#39; mailing list, at least =
my part of the<br>
&gt;&gt;&gt; discussion of the maintenance-words draft has been off-list wi=
th the<br>
&gt;&gt;&gt; authors (since the -00 draft), and the outcome is visible in t=
he<br>
&gt;&gt;&gt; diffs between the draft versions.<br>
&gt;&gt;&gt; (See also my trailing remark below.)<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt;&gt; The &quot;MUST-implement&quot; for DISCOURAGED has bee=
n discussed. =A0The<br>
&gt;&gt;&gt;&gt;&gt; rationale so far was that an algorithm in this state w=
ill usually<br>
&gt;&gt;&gt;&gt;&gt; previously have been ENCOURAGED or MANDATORY, and henc=
e it is<br>
&gt;&gt;&gt;&gt;&gt; expected that deployed implementations depend on it; t=
o ensure<br>
&gt;&gt;&gt;&gt;&gt; a smooth phasing out of such implementations without d=
isruption,<br>
&gt;&gt;&gt;&gt;&gt; it is wise to still require implementation of such alg=
orithms.<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; That&#39;s the thing, for the path MANDATORY-&gt;DISCOURAG=
ED-&gt;OBSOLETE,<br>
&gt;&gt;&gt;&gt; this makes complete sense. However, if you take<br>
&gt;&gt;&gt;&gt; ENCOURAGED-&gt;DISCOURAGED-&gt;OBSOLETE it&#39;s a bit wei=
rd; suddenly a<br>
&gt;&gt;&gt;&gt; SHOULD implement becomes a MUST implement, because we&#39;=
re trying<br>
&gt;&gt;&gt;&gt; to get rid of the feature...<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; (and in the case of RSA/MD5, to stay a bit on topic, i gue=
ss &#39;NOT<br>
&gt;&gt;&gt;&gt; RECOMMENDED&#39; becomes &#39;OBSOLETE&#39; because &#39;D=
ISCOURAGED&#39; would actually be<br>
&gt;&gt;&gt;&gt; stronger than the current status. But OBSOLETE is also str=
onger in<br>
&gt;&gt;&gt;&gt; another way. Either choice actually changes the current va=
lue, so the<br>
&gt;&gt;&gt;&gt; document does make a &#39;new&#39; statement about it)<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Well, I had purposely reported &quot;the rationale so far&quot=
;.<br>
&gt;&gt;&gt; Personally, I would equally well favor demoting the implementa=
tion<br>
&gt;&gt;&gt; requirement for DISCOURAGED from &quot;MUST&quot; to &quot;SHO=
ULD&quot;.<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; I thought the expected IETF LC discussion on the IETF main lis=
t<br>
&gt;&gt;&gt; would be the proper place for such discussion, since the scope=
<br>
&gt;&gt;&gt; of that draft far exceeds the scope of DNSEXT. ...<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt;<br>
&gt;&gt;&gt;&gt; Jelte<br>
&gt;&gt;&gt;<br>
&gt;&gt;&gt; Kind regards,<br>
&gt;&gt;&gt; =A0=A0Alfred.<br>
&gt;&gt;<br>
&gt;&gt; It is fine to have this discussion here for now,<br>
&gt;&gt; is:<br>
&gt;&gt;<br>
&gt;&gt; =A0=A0 =A0 =A0 =A0ENCOURAGED --&gt; OBSOLETE is better than going =
through DISCOURAGED.<br>
&gt;&gt; =A0=A0 =A0 =A0 =A0Olafur<br>
&gt;&gt;<br>
&gt;&gt;<br>
&gt;<br>
&gt;<br>
<br>
</div></div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
Scott Rose<br>
NIST<br>
<a href=3D"mailto:scottr@nist.gov">scottr@nist.gov</a><br>
ph: +1 301-975-8439<br>
Google Voice: +1-571-249-3671<br>
<br>
<a href=3D"http://www.dnsops.gov/" target=3D"_blank">http://www.dnsops.gov/=
</a><br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>
<br>
<br>
</blockquote></div><br></div>

--0016e6d7855364f05f047cfd1a88--


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To: Donald Eastlake <d3e3e3@gmail.com>, Olafur Gudmundsson <ogud@ogud.com>
From: Olafur Gudmundsson <ogud@ogud.com>
Subject: Re: [dnsext] Re: draft-ietf-dnsext-dnssec-registry-fixes vs.  draft-ogud-iana-protocol-maintenance-words
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At 09:23 12/01/2010, Donald Eastlake wrote:
>I think=20
>draft-ogud-iana-protocol-maintenance-words, at=20
>least in its current state, tries to encode way=20
>too many different dimensions into way too few words.
>
>I believe the existing clear and well understood=20
>implementation requirements (MUST, SHOULD, MAY,=20
>SHOULD NOT, MUST NOT) should be preserved. If=20
>you want to add an indication of predicted=20
>future implementation requirement state, that=20
>should be done by an explicit additional=20
>indicator, such as a suffix "+" or "-". Trying=20
>use just a few single words and also implicitly=20
>encoding operational requirements as well as=20
>implementation really seems like it is trying to=20
>force things into too few a number of cubbyholes.

I hear you,
This draft is an attempt to get a dialog going on what the vocabulary,
should be.
The main complication is to keep this simple and still combine
operational and implementation requirements and expectations.
As for the +/- the current definitions are more implementation
oriented and less operational.

The words that Scott and I selected are just first draft, we would love to
get constructive suggestions, we (mainly) selected words that are different
from what is in use already.


>Donald
>
>PS: Defining RESERVED and AVAILABLE is fine.
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
>Donald E. Eastlake 3rd   +1-508-634-2066 (home)
>155 Beaver Street
>Milford, MA 01757 USA
><mailto:d3e3e3@gmail.com>d3e3e3@gmail.com
>
>
>On Mon, Jan 11, 2010 at 8:02 AM, Olafur=20
>Gudmundsson <<mailto:ogud@ogud.com>ogud@ogud.com> wrote:
><no-hat>
>
>
>At 07:43 11/01/2010, Alfred =3D?hp-roman8?B?SM5uZXM=3D?=3D wrote:
>Jelte Jansen wrote:
> > On 01/11/2010 12:29 PM, Alfred H=CEnes wrote:
> >> There have been a few discussions early in December,
> >
> > My google skills seem to be aware of it being monday today, and i
> > have a hard time finding that discussion, so let me apologize if
> > i am repeating arguments that have been made already.
>
>In the lack of a proper 'home' mailing list, at least my part of the
>discussion of the maintenance-words draft has been off-list with the
>authors (since the -00 draft), and the outcome is visible in the
>diffs between the draft versions.
>(See also my trailing remark below.)
>
> >
> >> The "MUST-implement" for DISCOURAGED has been discussed.  The
> >> rationale so far was that an algorithm in this state will usually
> >> previously have been ENCOURAGED or MANDATORY, and hence it is
> >> expected that deployed implementations depend on it; to ensure
> >> a smooth phasing out of such implementations without disruption,
> >> it is wise to still require implementation of such algorithms.
> >
> > That's the thing, for the path MANDATORY->DISCOURAGED->OBSOLETE,
> > this makes complete sense. However, if you take
> > ENCOURAGED->DISCOURAGED->OBSOLETE it's a bit weird; suddenly a
> > SHOULD implement becomes a MUST implement, because we're trying
> > to get rid of the feature...
> >
> > (and in the case of RSA/MD5, to stay a bit on topic, i guess 'NOT
> > RECOMMENDED' becomes 'OBSOLETE' because 'DISCOURAGED' would actually be
> > stronger than the current status. But OBSOLETE is also stronger in
> > another way. Either choice actually changes the current value, so the
> > document does make a 'new' statement about it)
>
>Well, I had purposely reported "the rationale so far".
>Personally, I would equally well favor demoting the implementation
>requirement for DISCOURAGED from "MUST" to "SHOULD".
>
>I thought the expected IETF LC discussion on the IETF main list
>would be the proper place for such discussion, since the scope
>of that draft far exceeds the scope of DNSEXT. ...
>
> >
> > Jelte
>
>Kind regards,
>  Alfred.
>
>
>It is fine to have this discussion here for now,
>is:
>
>        ENCOURAGED --> OBSOLETE is better than going through DISCOURAGED.
>        Olafur
>
>



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--===============2042126819==--

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--===============1973143101==
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The results of your email command are provided below. Attached is your
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- Results:
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- Done.


--===============1973143101==
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Subject: 7 new messages from ladies for you (dating)
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--===============1973143101==--

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From dnsext-archive@ietf.org  Wed Jan 13 02:02:08 2010
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From dnsext-archive@lists.ietf.org  Wed Jan 13 04:57:14 2010
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From ladleddhx@shahcorp.com  Wed Jan 13 05:50:46 2010
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Subject: Maria is online now, waiting for your reply, Russian dating
Date: Wed, 13 Jan 2010 12:29:11 -0400
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From gingerbreadt@hotels-discount.com  Wed Jan 13 10:13:15 2010
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Subject: Russian ladies for any taste.
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From dnsext-archive@ietf.org  Wed Jan 13 11:44:59 2010
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Subject: [dnsext] FYI, netalyzr out of beta...
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We've moved Netalyzr ( http://netalyzr.icsi.berkeley.edu ) out of beta =
and added a host of new tests.

In particular, DNS MTU is now probed in detail for all clients, among =
the many other changes.



From owner-namedroppers@ops.ietf.org  Wed Jan 13 13:09:38 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001132058.VAA11959@TR-Sys.de>
Subject: [dnsext] Re: [DNSOP] Priming query transport selection
To: ogud@ogud.com, dnsop@ietf.org
Date: Wed, 13 Jan 2010 21:58:32 +0100 (MEZ)
Cc: namedroppers@ops.ietf.org
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I apologize for cross-posting due to topical overlap.
Please confine follow-up messages to the appropriate list.


In the message to DNSOP regarding draft-ietf-dnsop-resolver-priming-02
archived at
  <http://www.IETF.ORG/mail-archive/web/dnsop/current/msg07843.html>,
Olafur Gudmundsson scratched at a topic of interest to namedroppers
as well; he wrote:

>  ...
>
> Background:
> 26 signed glue records will require about 5K answer if each RRSet is
> signed by a single 1024 bit RSA key.
> This will never fit into an ENDS0 answer as number of implementations
> have 4096 byte hard limit on answer size.


Did you read the News these days?

An international team lead by the BSI (the "German NSA") and others
has solved the RSA-768 challenge, and experts reportedly expect, due
to significant progresses, that RSA-1024 will be solved in a rather
short time, likely by the end of this year or so!

This means that we should immediately plan operationally for
widespread use of 2048-bit RSA keys in the "near" future.


> As of today all the root servers instances that my host reached
> answered a TCP query.
>
> Proposed replacement text:
>
>|2.1.  Parameters of a Priming Query
>|
>|  A priming query MUST use a QNAME of "." and a QTYPE of NS, QCLASS
>|  of IN, with RD bit set to 0, the source port of the query should
>|  be randomly selected [RFC5452].
>|
>|  A DNSSEC aware resolver SHOULD sent the priming query over TCP.
>|  If TCP is refused a different server SHOULD be tried, after 3 tries
>|  the resolver SHOULD fall back on UDP.
>|
>|  A DNSSEC ignorant but EDNS0 capable, resolver SHOULD issue the
>|  priming query over UDP, ENDS0 option MUST be included with buffer
>|  size of 1220 or larger.  If the UDP query times out TCP SHOULD be
>|  tried.
>|
>|  An EDNS0 ignorant resolver MUST issue the priming query over UDP.
>
> ...

I therefore support the proposal suggested by Olafur:

Recommend that <DNSSEC aware resolvers> SHOULD issue priming queries
immediately over TCP, and not waste time and bandwidth with an
initial query over UDP (that will be truncated with certainty).
Even UDP with EDNS0 and 4k message size limit (which most likely
will need fragmentation and have trouble with firewalls) will not
provide a workable solution for a reasonable life time (of RFCs
and deployed equipment) and should only be tried as a fallback.

Those not liking DNS over TCP might wish to convince the IEEE to
quickly double the Ethernet frame size in the interim (in deployed
networks as well, of course!) and the IETF to bump the IPv4
512-byte UDP margin.   :-)


Additionally:
++++++++++++

Work on the use of Elliptic Curve Signatures with DNSSEC urgently
needs to be resumed *now* (in DNSEXT).

EC keys and signatures will roughly be shorter than RSA keys and
signatures by a *factor* of 4..8, for comparable levels of security.


Kind regards,
  Alfred.


P.S:  Olafur:   s/ENDS0/EDNS0/g  !   :-)
                   ^^    ^^
      [ BTW, one of my favorite personal typos, as well! ]


-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



From owner-namedroppers@ops.ietf.org  Thu Jan 14 02:36:56 2010
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Subject: [dnsext] RSA cracking
Date: Thu, 14 Jan 2010 10:28:39 +0000
References: <201001132058.VAA11959@TR-Sys.de>
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On 13 Jan 2010, at 20:58, Alfred H=CEnes wrote:

> An international team lead by the BSI (the "German NSA") and others
> has solved the RSA-768 challenge, and experts reportedly expect, due
> to significant progresses, that RSA-1024 will be solved in a rather
> short time, likely by the end of this year or so!

Hmmm. The paper by Klienjung et al (http://eprint.iacr.org/=20
2010/006.pdf) said it took ~2000 Opteron-years and ~2.5 years of =20
elapsed time to crack RSA768. So if you change keys every month or =20
two, there's not much to worry about.... BTW the authors of that paper =20=

said they don't expect 1024-bit RSA to be factored for another 5-10 =20
years with comparable resources to their RSA768 efforts unless =20
factoring algorithms improve a lot.

> This means that we should immediately plan operationally for
> widespread use of 2048-bit RSA keys in the "near" future.

True. Some of us deployed 2048-bit RSA keys in 2007. Perhaps your =20
friends at BSI might like to crack the KSK or ZSK for rfc1035.se? :-)



From owner-namedroppers@ops.ietf.org  Thu Jan 14 05:42:39 2010
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From: Suresh Krishnaswamy <suresh@tislabs.com>
To: Andrew Sullivan <ajs@shinkuro.com>
In-Reply-To: <20091219172324.GG52726@shinkuro.com>
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
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[ Moderators note: Post was moderated, either because it was posted by
   a non-subscriber, or because it was over 20K.  
   With the massive amount of spam, it is easy to miss and therefore 
   delete relevant posts by non-subscribers. 
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I have read both documents and support them going forward. I do have a  
couple of comments though:

1) I feel that "RFC required" is not a very high barrier in and of  
itself. We do have the control where the working group will have to re- 
evaluate the requirements when the registry is half full, but we have  
no means to enforce this control. I therefore agree with Sam's  
suggestion of making about half of these identifiers RESERVED, so that  
we're forced to revisit this requirement at the appropriate time.  
Alternatively, we could have the additional requirement that any  
algorithm that is to be added to the registry as part of the "RFC  
required" route must also be reviewed for appropriateness by an expert  
appointed by the WG chairs. This would prevent well-meaning  
cryptographers from aggressively consuming the first 50% of  
identifiers before the WG gets a chance to react. Note that I support  
the document(s) going forward even if this change is not made.

2) I also support Sam's suggestion of making all "RFC required"  
algorithms OPTIONAL, unless that status is changed by Standards action.

Suresh


On Dec 19, 2009, at 12:23 PM , Andrew Sullivan wrote:

> Dear colleagues,
>
> This email begins a three week Working Group Last Call for the two
> documents draft-ietf-dnsext-dnssec-alg-allocation-00.txt and
> draft-ietf-dnsext-dnssec-registry-fixes-01.txt.  We are calling these
> documents together because in our view they naturally complement one
> another.
>
> Please note that draft-ietf-dnsext-dnssec-alg-allocation-00.txt alters
> the way algorithm identifiers are assigned, and has a fail-safe
> provision in it to protect the number space as it starts to be
> depleted.  It is particularly important that the WG decide whether
> that provision is a good one and, if so, if it is set at the right
> level.
>
> This WGLC will end at 17:00 EST on 2010-01-09.  Participants are
> reminded that the WG's process rules require at least five people to
> say that they have read the document, and that they support it, before
> it can be forwarded to the IESG for publication.  We have the list of
> volunteers who previously agreed to read this document, and if you
> don't perform the review as expected, we'll approach you directly.
>
> Participants are reminded that _ad hominem_ attacks are not permitted,
> and that they should confine themsleves to the technical merits of the
> drafts.
>
> I will be the document shepherd for these drafts.
>
> Best regards,
>
> Andrew
>
> -- 
> Andrew Sullivan
> ajs@shinkuro.com
> Shinkuro, Inc.
>



From supplementingxuo638@rka-luggage.com  Thu Jan 14 09:18:09 2010
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Russian women need a prince. 
http://mi-caballo.com/index.php?idAff=136&action=3

From dnsop-bounces@ietf.org  Thu Jan 14 09:18:11 2010
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The results of your email command are provided below. Attached is your
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- Unprocessed:
    http://mi-caballo.com/index.php?idAff=136&action=3

- Done.


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From owner-namedroppers@ops.ietf.org  Thu Jan 14 12:17:41 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001142005.VAA13168@TR-Sys.de>
Subject: Re: [dnsext] Re: [DNSOP] Priming query transport selection
To: paul.hoffman@vpnc.org
Date: Thu, 14 Jan 2010 21:05:02 +0100 (MEZ)
Cc: jim@rfc1035.com, namedroppers@ops.ietf.org
In-Reply-To: <p06240812c775080f5e00@[75.101.18.87]> from Paul Hoffman at Jan "14," 2010 "09:47:42" am
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Paul Hoffman wrote:

> At 9:58 PM +0100 1/13/10, Alfred HÎnes wrote:
>>
>> Did you read the News these days?
>
> Yes.
>
>> An international team lead by the BSI (the "German NSA") and others
>> has solved the RSA-768 challenge, and experts reportedly expect, due
>> to significant progresses, that RSA-1024 will be solved in a rather
>> short time, likely by the end of this year or so!
>
> I would be quite interested in seeing articles that said that.  The
> research was lead, I believe, by people in Switzerland, many of whom
> are Dutch.  Also, their paper did not say "likely by the end of this
> year or so"; the first page says "well within the next decade".
> Seriously:  I'm interested in any articles that say what you said
> above, even if they are in German.
>
> --Paul Hoffman, Director
> --VPN Consortium


As I said, it was in the News here (Radio and Newspapers).

Therefore, admittedly, the details of the content are to be taken
with a grain of salt, as always; but I explicitly said "in the News",
so I expected readers being warned.  :-)
But you are right, perhaps I'd better searched for the origin, ... :-(

Thanks to Paul and Jim Reid for pointing to the "serious" paper
on the IACR eprint server.

However, the important points from my message that used that notice
as an eye-catcher IMO still are valid:

o   If we stay with RSA keys and signatures, specific signed
    DNS responses will grow significantly in the foreseeable
    future, so that handwaving arguments trying to squeeze
    reported 5k priming query responses (etc.) into "industry
    standard" 4k EDNS0 buffer space do not provide a realistic
    solution for the mid-term future (lifecycle of RFCs and
    products).

o   Therefore, the existing support for DNS over TCP should be
    used in appropriate cases immediately, and vendors still not
    providing it should hurry up to support DNS over TCP in their
    boxes.  (Same for EDNS0, of course!)

o   DNSEXT should resume work to leverage ECC for DNSSEC in order
    to allow gaining the benefits of much shorter keys and
    signatures than in the traditional RSA case.

Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



From owner-namedroppers@ops.ietf.org  Thu Jan 14 12:41:09 2010
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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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The ongoing off-list follow-up discussion (and review of older
discussion of the topic on namedroppers) has lead to tentative
text for an improved description of the content of AXFR responses
in Section 2.2 of draft-ietf-dnsext-axfr-clarify, based on a
proposal submitted by Andreas Gustafsson.  (To recall, it originally
had been requested in WGLC comments to move the original 2nd paragraph
from Section 3.1 in the -12 draft into Section 2.2 and expand on it.)

To give enough context, below is the full Section 2.2 text planned for
draft version -13, unless substantive arguments are raised against it
(changed/added lines are tagged).


-------- snip --------

2.2.  AXFR Response

|  The AXFR response will consist of one or more messages.  The special
|  case of a server closing the TCP connection without sending an AXFR
|  response is covered in section 2.3.

   An AXFR response that is transferring the zone's contents will
   consist of a series (which could be a series of length 1) of DNS
   messages.  In such a series, the first message MUST begin with the
   SOA resource record of the zone, the last message MUST conclude with
   the same SOA resource record.  Intermediate messages MUST NOT contain
   the SOA resource record.  The AXFR server MUST copy the Question
   section from the corresponding AXFR query message in to the first
   response message's Question section.  Subsequent messages MAY do the
   same or contain an empty Question section.
|
|  The AXFR protocol treats the zone contents as an unordered collection
|  (or to use the mathematical term, a "set") of RRs.  Except for the
|  requirement that the transfer must begin and end with the SOA RR,
|  there is no requirement to send the RRs in any particular order or
|  grouped into response messages in any particular way.  Although
|  servers typically do attempt to send related RRs (such as the RRs
|  forming an RRset, and the RRsets of a name) as a contiguous group or,
|  when message space allows, in the same response message, they are not
|  required to do so, and clients MUST accept any ordering and grouping
|  of the non-SOA RRs.  Each RR SHOULD be transmitted only once, and
|  AXFR clients MUST ignore any duplicate RRs received.
|
|  Each AXFR response message SHOULD contain a sufficient number of RRs
|  to reasonably amortize the per-message overhead, up to the largest
|  number that will fit within a DNS message (taking the required
|  content of the other sections into account, as described below).
|
|  Some old AXFR clients expect each response message to contain only a
|  single RR.  To interoperate with such clients, the server MAY
|  restrict response messages to a single RR.  As there is no standard
|  way to automatically detect such clients, this typically requires
|  manual configuration at the server.
|
   An AXFR response indicates an error via a single DNS message with the
|  response code set to the appropriate value for the condition
|  encountered, and it is sent when the error condition is detected.
|  Such a message terminates the AXFR session; it MUST copy the Question
|  section from the AXFR query into its Question section, but the
   inclusion of the terminating SOA resource record is not necessary.

   An AXFR server may send a number of AXFR response messages free of an
   error condition before it sends the message indicating an error.

-------- snip --------


Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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To: Alfred =?iso-8859-1?Q?H=F6nes?= <ah@TR-Sys.de>
Cc: paul.hoffman@vpnc.org, jim@rfc1035.com, namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: [DNSOP] Priming query transport selection
Message-ID: <20100114210117.GC14979@vacation.karoshi.com.>
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> 
> Thanks to Paul and Jim Reid for pointing to the "serious" paper
> on the IACR eprint server.
> 
> However, the important points from my message that used that notice
> as an eye-catcher IMO still are valid:
> 
> o   If we stay with RSA keys and signatures, specific signed
>     DNS responses will grow significantly in the foreseeable
>     future, so that handwaving arguments trying to squeeze
>     reported 5k priming query responses (etc.) into "industry
>     standard" 4k EDNS0 buffer space do not provide a realistic
>     solution for the mid-term future (lifecycle of RFCs and
>     products).
> 
> o   Therefore, the existing support for DNS over TCP should be
>     used in appropriate cases immediately, and vendors still not
>     providing it should hurry up to support DNS over TCP in their
>     boxes.  (Same for EDNS0, of course!)
> 
> o   DNSEXT should resume work to leverage ECC for DNSSEC in order
>     to allow gaining the benefits of much shorter keys and
>     signatures than in the traditional RSA case.
> 
> Kind regards,
>   Alfred.

	ECC really needs more work inside this group.

--bill


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On Jan 14, 2010, at 1:01 PM, bmanning@vacation.karoshi.com wrote:
>> o   DNSEXT should resume work to leverage ECC for DNSSEC in order
>>    to allow gaining the benefits of much shorter keys and
>>    signatures than in the traditional RSA case.
> 	ECC really needs more work inside this group.

Wow.  I actually agree with the inimitable Mr. Manning.  This always =
worries me when this happens.  :-)

Regards,
-drc



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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Alfred, Ed,

I have reviewed the axfr draft -12 and seen the text below.  The
document looks good.  I support the document.

1) fill the message up to the max is a bit too short.  Use of multiple
RRs to amortize the message header is a much better line.  Please use
such language.

2) Compression to preserve case is very nice as a feature and 'cool'.
However it is not strictly necessary for interoperability (right? or
does IXFR break because of it?  Yes our IXFR-client implementation
needed fixing for that).  Hence, without interoperability as an
argument, MUST is the wrong word.  Such compression is backwards
compatible, that is ok.

Best regards,
   Wouter


On 01/14/2010 09:29 PM, Alfred ï¿½ wrote:
> The ongoing off-list follow-up discussion (and review of older
> discussion of the topic on namedroppers) has lead to tentative
> text for an improved description of the content of AXFR responses
> in Section 2.2 of draft-ietf-dnsext-axfr-clarify, based on a
> proposal submitted by Andreas Gustafsson.  (To recall, it originally
> had been requested in WGLC comments to move the original 2nd paragraph
> from Section 3.1 in the -12 draft into Section 2.2 and expand on it.)
> 
> To give enough context, below is the full Section 2.2 text planned for
> draft version -13, unless substantive arguments are raised against it
> (changed/added lines are tagged).

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From owner-namedroppers@ops.ietf.org  Fri Jan 15 07:21:08 2010
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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12
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Cc: ed.lewis@neustar.biz
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Wouter Wijngaards wrote:

> Hi Alfred, Ed,
>
> I have reviewed the axfr draft -12 and seen the text below.  The
> document looks good.  I support the document.

Thanks for the review.

>
> 1) fill the message up to the max is a bit too short.  Use of multiple
> RRs to amortize the message header is a much better line.  Please use
> such language.

I'm not sure you refer here to the revised text (see below).
Maybe you had the old 2nd paragraph of 3.1 in mind that, on request
of another WGLC review, has been moved to Section 2.2 and expanded
in the meantime.

Regarding per-message overhead:

Depending on the circumstances and the design decisions of an
implementation, there are, beyond the message header, other
components consuming space hence not available for the Answer
section: Question (MAY, but not recommended) and Additional
section (MAY: transaction security, EDNS0).

Also, the total size of the message has an impact on the overhead:
It has been argued (and explained via pointers to past discussion
on namedroppers) that, if messages grow to the theoretical limit
of 64k octets, the limited pointer size for name compression would
counter a potentially substantial amount of opportunities for name
compression; that can be regarded as additional overhead.
In fact, keeping the message size below the 2^14 octet limit for
compression pointers might achieve a much better compression rate
at average and hence reduce the total overhead.

Therefore, I believe that "amortize the per-message overhead" is
reasonable in the current text.

It has been pointed out that the aforementioned restriction of name
compression and the related tradeoff for efficiency are specific
implementation details not affecting interoperability (provided name
compression is applied correctly -- an issue not specific to AXFR)
and should not be discussed in-depth in this protocol specification.
Please tell me if you disagree, preferably giving text.


For ease of reference for readers on the list:
The most recent text changes based on other comments ended up with
the paragraph (4th para of Section 2.2) shown below.

|  Each AXFR response message SHOULD contain a sufficient number of RRs
|  to reasonably amortize the per-message overhead, up to the largest
|  number that will fit within a DNS message (taking the required
|  content of the other sections into account, as described below).
|  Some old AXFR clients expect each response message to contain only a
|  single RR.  To interoperate with such clients, the server MAY
|  restrict response messages to a single RR.  As there is no standard
|  way to automatically detect such clients, this typically requires
|  manual configuration at the server.

(The entire revised version of Section 2.2 was in the posting you
referred to:
<http://ops.ietf.org/lists/namedroppers/namedroppers.2010/msg00037.html>)


> 2) Compression to preserve case is very nice as a feature and 'cool'.
> However it is not strictly necessary for interoperability (right? or
> does IXFR break because of it?  Yes our IXFR-client implementation
> needed fixing for that).  Hence, without interoperability as an
> argument, MUST is the wrong word.  Such compression is backwards
> compatible, that is ok.

As a result of the on-list discussion, the tweaked text in my working
copy has substituted "SHOULD" for the "MUST" and now says (new 2nd
para of section 3.4):

|  Since the primary objective of AXFR is to enable the client to serve
|  the same zone content as the server, unlike such normal DNS responses
|  that are expected to preserve the case in the query, the actual zone
|  transfer needs to retain the case of the labels in the zone content.
|  Hence, name compression in an AXFR message SHOULD be performed in a
|  case-preserving manner, unlike how it is done for 'normal' DNS
|  responses.  That is, although when comparing a domain name for
|  matching, "a" equals "A", when comparing for the purposes of message
|  compression for AXFR, "a" is not equal to "A".  Note that this is not
|  the usual definition of name comparison in the DNS protocol and
|  represents a new understanding of the requirement on AXFR servers.


Many thanks as well to other participants for continued off-list
discussion of editorial nits and language improvements.
In particular, Niall o'Reilly has contributed significantly
during this week to textual improvements of the memo.


Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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From owner-namedroppers@ops.ietf.org  Fri Jan 15 12:40:42 2010
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To: Suresh Krishnaswamy <suresh@tislabs.com>
Cc: Andrew Sullivan <ajs@shinkuro.com>,  namedroppers@ops.ietf.org
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-registry-fixes and draft-ietf-dnsext-dnssec-alg-allocation WGLC announcement
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References: <20091219172324.GG52726@shinkuro.com> <8C3337A7-D83F-47DE-87B1-70F71BCFD5B9@tislabs.com>
Date: Fri, 15 Jan 2010 12:30:04 -0800
In-Reply-To: <8C3337A7-D83F-47DE-87B1-70F71BCFD5B9@tislabs.com> (Suresh Krishnaswamy's message of "Wed, 13 Jan 2010 17:23:14 -0500")
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I've read the dnsext-dnssec-alg-allocation document and support it's
forward progress and have the following comments to offer:

First, I think Sam's and the following suggestions have been spot on for
fixing the conflicting of standards and non-standards with respect to
requirement levels.

I had also wanted to deleted the word "about" from "about half full" but
after catching up on the discussion I think the proposal of reserving
half the space is much better than attempting to trigger a review at
"about half full" time.  Reserving will make sure the review happens.

Other editorial comments:

1) I'd suggest a global search and replace of "rule" with "requirement"
   which would make it more consistent with the way most IETF documents
   seem to be written.  "rule" is much less common and I don't think is
   even used to refer to the requirement we're changing in the first
   place.

2) A number of places has "on Standards Track" which I think is also
   less consistent with the way it's commonly phrased and should be "on
   *the* Standards Track".

   There are a few instances of it missing in the RFCs, but by far the
   more common usage is to treat "Standards Track" as a noun and require
   the article:

   #  grep -i 'on standards track' *.txt | grep -i -v 'non standards track' | wc -l
   8

   # grep -i 'on the standards track' *.txt | wc -l
   162

3) Section 2, bullet 1, last sentence.  Suggested replacement to drop
   "an" and "situation, and" brings it to:

   Another example is that the algorithm might have unclear intellectual
   property rights that prevents the algorithm from being put on the
   Standards Track.

4) Section 2, bullet 2: remove "quite" from "quite restricted" since
   "quite" is very subjective.  In fact, if the number space was "quite
   restricted" that'd lead me to think we shouldn't be opening it up in
   the first place!

5) Section 2, paragraph starting with "Because" remove "essentially"
   from the last sentence.

6) Section 4, first paragraph, last sentence:

     "The registration procedure for values that were not assigned
     before this document is published is "RFC Required".

   That doesn't make sense to me as is.  I'm not sure whether the
   sentence is trying to state history or whether it's trying to assign
   "RFC Required" to numbers that were assigned before this document is
   published.  I think the second, in which case it should be:

     "The registration procedure for values that were --- assigned
     before this document is published is "RFC Required".

   Maybe I'm missing something here; either way I'm confused!

7) Section 5 after "... weaker." I'd suggest adding:

   Conversely, algorithms that are on the Standards Track should not
   necessarily be considered better than algorithms that are not on the
   Standards Track.


-- 
Wes Hardaker
Cobham Analytic Solutions


From dnsext-archive@lists.ietf.org  Sat Jan 16 07:45:22 2010
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Hello dear, do you remember how we communicated with you?<br> Long ago you could not see, I am Marina - with Russia, do you remember me?<br> "Come to my page - let's talk, I'm waiting!<br>
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From dnsext-archive@ietf.org  Sat Jan 16 07:46:18 2010
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From dnsext-archive@lists.ietf.org  Sat Jan 16 13:22:13 2010
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Hi, I am sad and dreary one - there - In Moscow,<br> I live alone now hooked up the internet, that's looking for someone to talk to,<br> I have a web camera as well as personal page on the internet, come on,<br> help me to remove my sadness.<br>
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From dnsext-archive@ietf.org  Sat Jan 16 13:22:42 2010
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Good day, I accidentally found a letter from you, I remember how we communicated with you.<br> You were so hot, let's talk again - drop me to the page - I'll wait for my very sweet!<br>
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From dnsext-archive@lists.ietf.org  Sun Jan 17 04:41:47 2010
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Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started?<br> "I'm on this dating site - come in to me.<br><br>
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From dnsext-archive@ietf.org  Sun Jan 17 04:42:20 2010
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Good day, I accidentally found a letter from you, I remember how we communicated with you.<br> You were so hot, let's talk again - drop me to the page - I'll wait for my very sweet!<br>
<a href="http://zoxusesu.tumblr.com">Click here</a><br>
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From dnsext-archive@ietf.org  Sun Jan 17 10:07:03 2010
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Hello dear, do you remember how we communicated with you?<br> Long ago you could not see, I am Marina - with Russia, do you remember me?<br> "Come to my page - let's talk, I'm waiting!<br>
<a href="http://mihadini.tumblr.com">Click here</a><br>
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From dnsext-archive@lists.ietf.org  Sun Jan 17 10:34:35 2010
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From: Sveta <dnsext-archive@lists.ietf.org>
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Subject: Hey, you forgot about me?
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Hello dear, do you remember how we communicated with you?<br> Long ago you could not see, I am Marina - with Russia, do you remember me?<br> "Come to my page - let's talk, I'm waiting!<br>
<a href="http://mihadini.tumblr.com">Click here</a><br>
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From dnsext-archive@ietf.org  Sun Jan 17 15:58:58 2010
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Subject: I came to you, and your number does not answer, Anna.
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Hello dear, do you remember how we communicated with you?<br> Long ago you could not see, I am Marina - with Russia, do you remember me?<br> "Come to my page - let's talk, I'm waiting!<br>
<a href="http://curuwymi.tumblr.com">Click here</a><br>
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From dnsext-archive@lists.ietf.org  Sun Jan 17 15:59:58 2010
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Subject: I arrived only a week, very much want to see you!
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Hey, why do not you write? You forgot about me?<br> "I am very unhappy without you, remember me?" It's me, Olga from Russia, Moscow, remember?<br> I'm waiting for you on his page on the Internet, and miss you terribly!<br><br>
<a href="http://curuwymi.tumblr.com">Click here</a><br>
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From contraryd@paramountgranite.com  Sun Jan 17 17:34:29 2010
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Subject: Beautiful Russian women. 
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From dnsext-archive@ietf.org  Sun Jan 17 17:47:34 2010
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From: Olga <dnsext-archive@ietf.org>
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Subject: Come to my profile, I have laid out the network new photos!
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Hey, why do not you write? You forgot about me?<br> "I am very unhappy without you, remember me?" It's me, Olga from Russia, Moscow, remember?<br> I'm waiting for you on his page on the Internet, and miss you terribly!<br><br>
<a href="http://wyvyzefy.tumblr.com">Click here</a>
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From dnsext-archive@lists.ietf.org  Sun Jan 17 17:47:39 2010
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From: Olga <dnsext-archive@lists.ietf.org>
To: dnsext-archive@lists.ietf.org
Subject: I'll still love you, come to me, I'm in a hotel!
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Hi, I am sad and dreary one - there - In Moscow,<br> I live alone now hooked up the internet, that's looking for someone to talk to,<br> I have a web camera as well as personal page on the internet, come on,<br> help me to remove my sadness.<br><br>
<a href="http://wyvyzefy.tumblr.com">Click here</a>
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From dm@ietf.org  Mon Jan 18 02:27:30 2010
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From owner-namedroppers@ops.ietf.org  Mon Jan 18 09:07:25 2010
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Date: Mon, 18 Jan 2010 11:58:28 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] WG virtual interim meeting 2010-02-16 15:00 UTC
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Dear colleagues,

This is an official announcement of a WG interim meeting on 2010-02-16
at 15:00 UTC.  The meeting will be held by teleconference supported by
Webex.  Details for participants will be announced soon.

The details below are also available from the WG Wiki, on the IETF
tools pages: http://trac.tools.ietf.org/wg/dnsext/trac/wiki

TIMELINE

Interim meeting announcement 2010-01-18
Overview and draft problem statement 2010-01-18
I-Ds for consideration at meeting due 2010-02-02
Supporting materials for interim meeting due 2010-02-15 17:00 UTC
DNSEXT interim meeting  2010-02-16 15:
Short summary from chairs 
      including decision about Anaheim meeting 2010-02-19 17:00 UTC

There will almost certainly be further follow-on actions from the
interim, but we'll include a plan of action in our short summary.
That decision date is the latest we commit to confirming the Anaheim
session.  It is more than a month from the IETF Anaheim meeting, and
so should be enough time for travel planning if need be.


The DNSEXT working group is discussing the topic of making two trees
in the DNS work just the same as one another.  The Chairs have asked
participants to treat this as a generic problem, but it is motivated
by particular use cases.

    THE PROBLEMS WE ARE TRYING TO SOLVE

The CNAME RRTYPE provides terminal name redirection, but does not provide
redirection of names below the RNAME of the CNAME RR.  

The DNAME RRTYPE provides name redirection for names below the
RNAME of the DNAME RR, but does not provide redirection for the RNAME
itself.

The specifications do not allow CNAME and DNAME at the same owner
name.  At the same time, some RR specifications (like MX, for
instance) require that they not resolve to a CNAME or DNAME.

As a result of the above, there is no general-purpose "alias" function
in the DNS.  In some circumstances, however, such an aliasing function
would be desirable.  One particular example that has recently received
a lot of attention is the notion of IDN "variants".

In some linguistic contexts, two strings that do not compare as binary
equivalent are nevertheless recognized by every competent speaker of
the language to be "the same word".  Consider the English language
examples, "color" and "colour".  In British spelling, the latter is
unambiguously correct, and in US spelling the former is.  In Canadian
spelling, however, the two spellings are both correct (though one is
supposed to pick one spelling and stick with it).  If one wanted to
use the string "color" as a domain name label, color.example, then one
might also desire that colour.example resolve the same way.

Now, traditionally in the DNS we have treated two different labels
that nevertheless correspond to "the same word" as simply different
labels.  If someone wants two labels to work as though they are the
same name, then it is that person's responsibility to operate two
zones and arrange things so that the two zones are equivalent.

This approach works fairly well for cases like English, but tend to
break down for both practical and policy reasons when one attempts to
use the same approach for (some) other languages.  

One practical consideration, to begin with, is that some languages
produce very large numbers of alternative spellings for "the same
word", usually because of accents.  Requiring that operators of zones
in such IDN operational contexts manage large numbers of such variants
as individual zones not only imposes an operational burden on
operators serving such linguistic communities, but it also is
practically impossible (because if the zones are truly separate zones,
possibly in different parent zones, then they may well have different
results available from caches).

A second practical consideration is that the variants are effectively
required in some cases, because of limitations of user environments.
Because users can be expected to be able to enter one "form of a
label" and not another, both labels need to resolve to the same result.
Imagine, for instance, that being able to type in "colour" meant that
you were unable also to type "color", and you can see the effect of
the problem.  Remember that everything below the delegation has this
issue (and consider the effects of this on the hapless DNS
administrator who is not aware of whether the label in use is a DNAME
or a "primary" name).

The policy consideration is slightly different.  When a zone operator
delegates a name and its variant names away, the delegation of the
"bundle" of variants is predicated on the assumption that all the
names will behave in the same way; otherwise, they are just different
names from one another.  In the absence of any mechanism to force
two names to resolve identically, there is no way for the delegator to be
certain that the two names are being used as identical to one another.

If IDN variants were the only case where one might want to have two
DNS trees work exactly the same way, then it would probably be worth
attempting to solve only that narrow issue rather than working to
invent a notion of aliasing for whole trees.  But other examples of
how this sort of behaviour might be useful are easy to imagine.  For
instance, it is easy to see that it could be useful for the operator
of two zones that are both (say) a different names for the same firm
to be able to make the two zones work the same way all the time.

    PARTIAL SOLUTION SPACE

In what follows, when appropriate, we suppose that one domain of the
set of a variant bundle is the "main name", and that the other names
are "variant names".  The main name is normally the name under which
the zone has all the resource records; variants normally point to the
main name somehow.

Note that some of the items actually 

1.  Do Nothing

The WG can decide that this is not a problem, and that nothing
should be done about it.  Also, the WG can decide that the problem
cannot be solved.  

2.  Recommend the problem be solved as a matter of provisioning

The WG could decide that there is a legitimate problem to be solved
here, but that it should not be solved with any changes to the DNS.
In this case, the WG might suggest that the work be taken to another
existing WG, or that a WG be chartered to take up this precise issue.

3.  Recommend the problem be solved in zone master servers: "clone"

The WG could decide that the problem could be addressed by
implementations offering a "clone zone" feature.  This is not strictly
a change to the DNS protocols.  Instead, it is a way for DNS servers
to mark two namespaces as equivalent internally, without any apparent
changes to the DNS protocols as such.  This approach might have some
implications for DNSSEC, and for Dynamic Update.

4.  Provide operational guidance for supporting the goal using CNAME
only

It is probably actually impossible to obtain the desired behaviour
using only CNAME.  But CNAME could be used as a mechanism to provide
"aliases" for any terminal name.

5.  Solve the problem using DNAME at the parent.

In combination with some provisioning tools, DNAME might be an
adequate solution to this issue.  DNAME entails some server-side
processing, however.

6.  Recommend delegation to zones using DNAME at the child

Instead of using DNAMEs at the parent side, the parent could delegate
as though the zone is a completely different zone, but require as a
matter of contract that the variant zones include a DNAME for the
name, and all and only DNS RRs for non-DNS-control records must also
match.  (So, for instance, NS records in the variant, and the SOA
record or any RRSIG record, need not match.  But for every A record at
the main name, there must be a corresponding A record at each variant
name, and for every A record at a variant name, there must be a
corresponding A record at the main name.)

7.  Alter the specification of DNAME to permit combination with CNAME

The combination of CNAME and DNAME would allow an entire tree to be
aliased without difficulty.  This is a backwards-incompatible change,
however.

8.  Do (7) except with a new RRTYPE

This is the "BNAME" proposal, more or less.

9.  Provide an aliasing mechanism that points to an NS record, and
which is not allowed to be part of a chain.


Best regards,

Andrew and Olafur


-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


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From owner-namedroppers@ops.ietf.org  Mon Jan 18 13:49:22 2010
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To: Edward Lewis <Ed.Lewis@neustar.biz>
Cc: Brian Wellington <brian.wellington@nominum.com>, namedroppers@ops.ietf.org
From: Mark Andrews <marka@isc.org>
References: <EAD8F88D-C395-40C5-B983-929A95E3FCD7@nominum.com> <a06240800c76a97d81a31@[10.31.200.252]> <596FCB8B-3A9C-45A6-960E-78D513450408@nominum.com> <a06240803c76aa819e967@[10.31.200.252]> 
Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
In-reply-to: Your message of "Wed, 06 Jan 2010 15:52:40 CDT." <a06240803c76aa819e967@[10.31.200.252]> 
Date: Tue, 19 Jan 2010 08:39:47 +1100
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In message <a06240803c76aa819e967@[10.31.200.252]>, Edward Lewis writes:
> At 12:24 -0800 1/6/10, Brian Wellington wrote:
> 
> 1.
> 
> >...but am having trouble figuring out why this is important...

* People like seeing names with the case they expect.
* Software that isn't completely as case insensitive as it should be.
 
> 2.
> 
> >I don't know of any servers that do this currently.

Named as of BIND 9.4.0 does case sensitive compression in response
to bug reports that case was no longer preserved in IN-ADDR.ARPA
zone transfers as a result of switching from one record per message
to multiple records per message.

1811.   [func]          Preserve the case of domain names in rdata during
                        zone transfers. [RT #13547]

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org


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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
In-reply-to: Your message of "Wed, 06 Jan 2010 12:24:23 -0800." <596FCB8B-3A9C-45A6-960E-78D513450408@nominum.com> 
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In message <596FCB8B-3A9C-45A6-960E-78D513450408@nominum.com>, Brian Wellington
 writes:
> I believe this is realistic, but am having trouble figuring out why this =
> is important, given that even if the case is preserved across AXFR, it's =
> not going to be preserved in query responses.  In order for this to be =
> meaningful, we'd also need to change IXFR, DDNS, and who knows what =
> else.

AXFR is bulk.  QUERY is individual.  
IXFR should also do case preserving compression.

DDNS should send the additions such that the case in rdata is
preserved.  To change the case of a record you remove and add it
with the correct case.
 
RFC 1034 and RFC 1035 says case should be preserved.  You fix the parts of
the specification that are broken or need to be made clearer / explicit as
you go.  This is one of those places.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org


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From owner-namedroppers@ops.ietf.org  Mon Jan 18 17:16:50 2010
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From coolantstv089@webave.com  Mon Jan 18 17:32:50 2010
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To: dnsext-archive@lists.ietf.org
Subject: Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started? "I'm on this dating site - come in to me.

I sexual Russian blonde, want to see, come closer.
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From dnsop-bounces@ietf.org  Mon Jan 18 17:32:51 2010
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Subject: The results of your email commands
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--===============1884315012==
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Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Done.


--===============1884315012==
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To: dnsext-archive@lists.ietf.org
Subject: Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started? "I'm on this dating site - come in to me.

I sexual Russian blonde, want to see, come closer.
http://raidonline.info/index.php?idAff=136&action=3

--===============1884315012==--

From coolantstv089@webave.com  Mon Jan 18 17:32:50 2010
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To: dnsext-archive@lists.ietf.org
Subject: Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started? "I'm on this dating site - come in to me.

I sexual Russian blonde, want to see, come closer.
http://raidonline.info/index.php?idAff=136&action=3

From owner-namedroppers@ops.ietf.org  Tue Jan 19 11:09:22 2010
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From: IESG Secretary <iesg-secretary@ietf.org>
To: ietf-announce@ietf.org
Cc: namedroppers@ops.ietf.org
Subject: [dnsext] DNSEXT WG Virtual Interim Meeting 
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The DNSEXT WG will hold an Interim meeting by audio on Tuesday, 16th Feb
2010 at 15:00 UTC, New York 10:00, Beijing 23:00, Moscow 18:00.
http://www.timeanddate.com/worldclock/fixedtime.html?year=2010&month=2&day=16&hour=15&min=0&sec=0


Agenda, slides and webex url and conference call dial-in details will be
posted to the mailing list and webpage:
http://trac.tools.ietf.org/wg/dnsext/trac/wiki/WikiStart


Original working group announcement:
http://www.psg.com/lists/namedroppers/namedroppers.2010/msg00043.html


From owner-namedroppers@ops.ietf.org  Tue Jan 19 14:23:40 2010
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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
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From: Brian Wellington <brian.wellington@nominum.com>
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On Jan 18, 2010, at 1:39 PM, Mark Andrews wrote:

>=20
> In message <a06240803c76aa819e967@[10.31.200.252]>, Edward Lewis =
writes:
>> At 12:24 -0800 1/6/10, Brian Wellington wrote:
>>=20
>> 1.
>>=20
>>> ...but am having trouble figuring out why this is important...
>=20
> * People like seeing names with the case they expect.
> * Software that isn't completely as case insensitive as it should be.

Unless I'm missing something, the "software that isn't as case =
insensitive as it should be" is going to be doing queries, and this =
draft doesn't change any behavior for queries, so that software will =
still fail.

And if there is some change made to query processing, broken software is =
still going to be broken; it's pretty easy to imagine software which =
expects the answer to have the same case as the query.

>> 2.
>>=20
>>> I don't know of any servers that do this currently.
>=20
> Named as of BIND 9.4.0 does case sensitive compression in response
> to bug reports that case was no longer preserved in IN-ADDR.ARPA
> zone transfers as a result of switching from one record per message
> to multiple records per message.
>=20
> 1811.   [func]          Preserve the case of domain names in rdata =
during
>                        zone transfers. [RT #13547]

Point taken, but a clarification based on a change made fairly recently =
to BIND still isn't a clarification.   Do any other servers do this?

Brian



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From: Mark Andrews <marka@isc.org>
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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
In-reply-to: Your message of "Tue, 19 Jan 2010 14:16:43 -0800." <6CBF58FC-F379-4936-ACCD-A2A1670B4761@nominum.com> 
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In message <6CBF58FC-F379-4936-ACCD-A2A1670B4761@nominum.com>, Brian Wellington
 writes:
> 
> On Jan 18, 2010, at 1:39 PM, Mark Andrews wrote:
> 
> >=20
> > In message <a06240803c76aa819e967@[10.31.200.252]>, Edward Lewis =
> writes:
> >> At 12:24 -0800 1/6/10, Brian Wellington wrote:
> >>=20
> >> 1.
> >>=20
> >>> ...but am having trouble figuring out why this is important...
> >=20
> > * People like seeing names with the case they expect.
> > * Software that isn't completely as case insensitive as it should be.
> 
> Unless I'm missing something, the "software that isn't as case =
> insensitive as it should be" is going to be doing queries, and this =
> draft doesn't change any behavior for queries, so that software will =
> still fail.

If I have a reverse zone with 

	9 PTR foo.Example.net.

I then add a record

	8 PTR bar.ExAmPle.net.

If you don't preserve case the 9 record may suddenly change case to
foo.ExAmPle.net which breaks anything which was case sensitvely
comparing against foo.Example.net without you ever touching
foo.Example.net.  If you preserve case you still get some compresion
(net) rather than (ExAmPle.net).  You also don't tickle the bug in
the broken software.

Similarly when records move from one DNS message to another in the
AXFR stream the case may change as you end up using different
compression tables.

> And if there is some change made to query processing, broken software is =
> still going to be broken; it's pretty easy to imagine software which =
> expects the answer to have the same case as the query.
>
> >> 2.
> >>=20
> >>> I don't know of any servers that do this currently.
> >=20
> > Named as of BIND 9.4.0 does case sensitive compression in response
> > to bug reports that case was no longer preserved in IN-ADDR.ARPA
> > zone transfers as a result of switching from one record per message
> > to multiple records per message.
> >=20
> > 1811.   [func]          Preserve the case of domain names in rdata =
> during
> >                        zone transfers. [RT #13547]
> 
> Point taken, but a clarification based on a change made fairly recently =
> to BIND still isn't a clarification.   Do any other servers do this?
> 
> Brian

They all SHOULD be doing this as case preservation is a SHOULD in RFC 103[45].

Mark

-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org


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Subject: Re: [dnsext] Comments on draft-ietf-dnsext-axfr-clarify-12 
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On Jan 19, 2010, at 10:32 PM, Mark Andrews wrote:

> In message <6CBF58FC-F379-4936-ACCD-A2A1670B4761@nominum.com>, Brian =
Wellington
> writes:
>>=20
>> On Jan 18, 2010, at 1:39 PM, Mark Andrews wrote:
>>>=20
>>> In message <a06240803c76aa819e967@[10.31.200.252]>, Edward Lewis =3D
>> writes:
>>>> At 12:24 -0800 1/6/10, Brian Wellington wrote:
>>>>=20
>>>> 1.
>>>>=20
>>>>> ...but am having trouble figuring out why this is important...
>>>=20
>>> * People like seeing names with the case they expect.
>>> * Software that isn't completely as case insensitive as it should =
be.
>>=20
>> Unless I'm missing something, the "software that isn't as case =3D
>> insensitive as it should be" is going to be doing queries, and this =3D=

>> draft doesn't change any behavior for queries, so that software will =
=3D
>> still fail.
>=20
> If I have a reverse zone with=20
>=20
> 	9 PTR foo.Example.net.
>=20
> I then add a record
>=20
> 	8 PTR bar.ExAmPle.net.
>=20
> If you don't preserve case the 9 record may suddenly change case to
> foo.ExAmPle.net which breaks anything which was case sensitvely
> comparing against foo.Example.net without you ever touching
> foo.Example.net.  If you preserve case you still get some compresion
> (net) rather than (ExAmPle.net).  You also don't tickle the bug in
> the broken software.
>=20
> Similarly when records move from one DNS message to another in the
> AXFR stream the case may change as you end up using different
> compression tables.

Ah, this clears things up.  The important point is that it's the rdata =
where case is important, not the owner names, and this likely wouldn't =
be affected by any compression done as part of query processing.

>>=20
>>>> 2.
>>>>=20
>>>>> I don't know of any servers that do this currently.
>>>=20
>>> Named as of BIND 9.4.0 does case sensitive compression in response
>>> to bug reports that case was no longer preserved in IN-ADDR.ARPA
>>> zone transfers as a result of switching from one record per message
>>> to multiple records per message.
>>>=20
>>> 1811.   [func]          Preserve the case of domain names in rdata =3D=

>> during
>>>                       zone transfers. [RT #13547]
>>=20
>> Point taken, but a clarification based on a change made fairly =
recently =3D
>> to BIND still isn't a clarification.   Do any other servers do this?
>>=20
>> Brian
>=20
> They all SHOULD be doing this as case preservation is a SHOULD in RFC =
103[45].

RFC 1034 says:

When you receive a domain name or label, you should preserve its case.

but also:

By convention, domain names can be stored with arbitrary case, but
domain name comparisons for all present domain functions are done in a
case-insensitive manner, assuming an ASCII character set, and a high
order zero bit.

RFC 1035 says:

In this scheme, an entire domain name or a list of labels at
the end of a domain name is replaced with a pointer to a prior occurance
of the same name.

Case preservation is a SHOULD, but it can also be reasonably inferred =
from the latter two blocks of text that two names with different case =
are the same, and compression should be applied to them.

Brian=


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From dnsop-bounces@ietf.org  Wed Jan 20 07:41:01 2010
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--===============1389195100==
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The results of your email command are provided below. Attached is your
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--===============1389195100==
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--===============1389195100==--

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From owner-namedroppers@ops.ietf.org  Wed Jan 20 14:28:29 2010
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Date: Wed, 20 Jan 2010 17:18:14 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: [dnsext] Ancient list archives
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[No hat]

Dear colleagues,

Over on the Internet history list, there is a discussion about some
history of names and, specifically, TLDs.  The questions could be
answered with reference to old archives but, alas, there are none that
are public.

If anyone has access to pre-1990 archives of this (namedroppers) list,
I bet such people's observations in the thread including the message

http://mailman.postel.org/pipermail/internet-history/2010-January/001161.html

would be welcome.  None of the discussion there is even remotely
related to DNSEXT, but I thought I'd ask in case there are some people
here who have some old archives squirreled away.

Best regards,

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


From owner-namedroppers@ops.ietf.org  Wed Jan 20 15:54:14 2010
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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DNS Extensions Working Group of the IETF.


	Title           : Cryptographic Algorithm Identifier Allocation for DNSSEC
	Author(s)       : P. Hoffman
	Filename        : draft-ietf-dnsext-dnssec-alg-allocation-01.txt
	Pages           : 6
	Date            : 2010-01-20

This document specifies how DNSSEC cryptographic algorithm
identifiers in the IANA registries are allocated.  It changes the
requirement from "standard required" to "RFC required".  It does not
change the list of algorithms that are recommended or required for
DNSSEC implementations.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-dnsext-dnssec-alg-allocation-01.txt

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From owner-namedroppers@ops.ietf.org  Wed Jan 20 16:13:17 2010
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Date: Wed, 20 Jan 2010 16:07:02 -0800
To: namedroppers@ops.ietf.org
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: [dnsext] Changes in draft-ietf-dnsext-dnssec-alg-allocation-01.txt from WG LC
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Greetings again. I have revised draft-ietf-dnsext-dnssec-alg-allocation based on the input from the WG. The comments weren't completely consistent, so I tried to get the gist of what everyone wanted. Please let me know if this isn't the case.

--Paul Hoffman, Director
--VPN Consortium


From owner-namedroppers@ops.ietf.org  Wed Jan 20 19:27:45 2010
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From: Andrew Sullivan <ajs@shinkuro.com>
To: Andrew Sullivan <ajs@shinkuro.com>
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Oops. As someone pointed out to me, the reference isn't transparent.   
The list I mentioned is  <internet-history@postel.org>

Best,

A

-- 
Andrew Sullivan
<ajs@shinkuro.com>



From dnsext-archive@lists.ietf.org  Wed Jan 20 23:35:12 2010
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Date: Thu, 21 Jan 2010 07:08:25 -0500
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Andrew Sullivan wrote:
> If anyone has access to pre-1990 archives of this (namedroppers) list,
> I bet such people's observations in the thread including the message
> 
Sadly, I had a lot, but they were all printed on paper.  I was weary of
paying $180/month for a storage unit for my paper archives, and recycled
almost everything last April, including TCP and IP papers from the late
1970s, figuring I'd never look at them again.  Sorry.


From owner-namedroppers@ops.ietf.org  Thu Jan 21 06:05:12 2010
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Date: Thu, 21 Jan 2010 08:55:32 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] I-D Action:draft-ietf-dnsext-dnssec-alg-allocation-01.txt
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Dear colleagues,

On Wed, Jan 20, 2010 at 03:45:02PM -0800, Internet-Drafts@ietf.org wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the DNS Extensions Working Group of the IETF.
> 
> 
> 	Title           : Cryptographic Algorithm Identifier Allocation for DNSSEC
> 	Author(s)       : P. Hoffman
> 	Filename        : draft-ietf-dnsext-dnssec-alg-allocation-01.txt
> 	Pages           : 6
> 	Date            : 2010-01-20

As you are no doubt aware, we completed a WGLC for the previous
version of the above document on 2010-01-15.  I am the document
shepherd for this draft.

I believe that the -01 revisions capture the substance of the comments
received during last call.  Apart from one editorial nit I sent the
editor, I'm satisfied with the document.

If you had comments during LC, please check to ensure that the
revisions address any issue you raised.  If I don't hear anything from
anyone before Monday (i.e. 2010-01-25 00:00:00 +00), I'll take that to
be agreement and I'll prepare the PROTO write up and submit this
draft to the IESG with a request for publication.

Thanks to Paul for his work on this, and to the reviewers for their
prompt attention and reviews.

Best regards,

Andrew.

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001211444.PAA26600@TR-Sys.de>
Subject: Re: [dnsext] Ancient list archives
To: william.allen.simpson@gmail.com
Date: Thu, 21 Jan 2010 15:44:33 +0100 (MEZ)
Cc: namedroppers@ops.ietf.org, internet-history@postel.org, iad@ietf.org, execd@iab.org
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[[ With respect to the general nature of the topic, I copy selected
   IETF administrative leadership: the IAD and the IAB Executive
   director. ]]

At Thu, 21 Jan 2010 07:08:25 -0500, William Allen Simpson wrote:
> Andrew Sullivan wrote:
>
>    If anyone has access to pre-1990 archives of this (namedroppers)
>    list, I bet such people's observations in the thread including
>    the message [...]
>
> Sadly, I had a lot, but they were all printed on paper.  I was weary
> of paying $180/month for a storage unit for my paper archives, and
> recycled almost everything last April, including TCP and IP papers
> from the late 1970s, figuring I'd never look at them again.  Sorry.

Really sad.

As a general wisdom -- not particular to Internet history -- :

If you are in possession of material of potential interest for
(current and future) historians, ensure that the material is
conserved.

If you have no other trustworthy possibility to ensure that, offer
to donate the material to a competent public archive or library
(library of a university, national library, the Library of Congress
in the U.S., etc.).  As a surplus, offer helping them to properly
catalogue the material to make it more easily accessible.
Do that immediately if you want to get rid of the material (e.g.
for similar reasons as pointed out above), and in any case, as a
precautionary measure, lay down testamentary disposition to make
the donation happen when you pass by (get in contact with them in
advance to ensure you find a proper institution!).

We should not ignore that the latter will become even more important
in the future, with the Internet starting to survive its veterans
and early documentation activists.

AFAIK, the RFC Editor also has maintained a paper archive in the
past.  I do not know about the extent of that archive, its fate,
and future plans with the RFC 5620 institutions.  And does ICANN
support such archival activities?

Kind regards,
  Alfred HÎnes.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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Date: Thu, 21 Jan 2010 07:46:26 -0800
To: William Allen Simpson <william.allen.simpson@gmail.com>
From: Paul Hoffman <paul.hoffman@vpnc.org>
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At 7:08 AM -0500 1/21/10, William Allen Simpson wrote:
>Andrew Sullivan wrote:
>>If anyone has access to pre-1990 archives of this (namedroppers) list,
>>I bet such people's observations in the thread including the message
>>
>Sadly, I had a lot, but they were all printed on paper.  I was weary of
>paying $180/month for a storage unit for my paper archives, and recycled
>almost everything last April, including TCP and IP papers from the late
>1970s, figuring I'd never look at them again.  Sorry.

In case someone else on this list is considering destroying valuable history like Bill did, strongly consider instead finding an archive who will take them. <http://textfiles.com/> should be your first stop; they are funded to scan historical records of the computer industry and make them freely available.

--Paul Hoffman, Director
--VPN Consortium


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From: Marshall Eubanks <tme@americafree.tv>
To: Ray Pelletier <rpelletier@isoc.org>
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Subject: Re: [dnsext] Ancient list archives
Date: Thu, 21 Jan 2010 11:00:56 -0500
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On Jan 21, 2010, at 10:07 AM, Ray Pelletier wrote:

>
> On Jan 21, 2010, at 9:44 AM, Alfred H=CEnes wrote:
>
>> [[ With respect to the general nature of the topic, I copy selected
>>  IETF administrative leadership: the IAD and the IAB Executive
>>  director. ]]
>>
>> At Thu, 21 Jan 2010 07:08:25 -0500, William Allen Simpson wrote:
>>> Andrew Sullivan wrote:
>>>
>>>  If anyone has access to pre-1990 archives of this (namedroppers)
>>>  list, I bet such people's observations in the thread including
>>>  the message [...]
>>>
>>> Sadly, I had a lot, but they were all printed on paper.  I was weary
>>> of paying $180/month for a storage unit for my paper archives, and
>>> recycled almost everything last April, including TCP and IP papers
>>> from the late 1970s, figuring I'd never look at them again.  Sorry.
>>
>> Really sad.
>>
>> As a general wisdom -- not particular to Internet history -- :
>>
>> If you are in possession of material of potential interest for
>> (current and future) historians, ensure that the material is
>> conserved.
>>
>> If you have no other trustworthy possibility to ensure that, offer
>> to donate the material to a competent public archive or library
>> (library of a university, national library, the Library of Congress
>> in the U.S., etc.).  As a surplus, offer helping them to properly
>> catalogue the material to make it more easily accessible.
>> Do that immediately if you want to get rid of the material (e.g.
>> for similar reasons as pointed out above), and in any case, as a
>> precautionary measure, lay down testamentary disposition to make
>> the donation happen when you pass by (get in contact with them in
>> advance to ensure you find a proper institution!).
>>
>> We should not ignore that the latter will become even more important
>> in the future, with the Internet starting to survive its veterans
>> and early documentation activists.
>>
>> AFAIK, the RFC Editor also has maintained a paper archive in the
>> past.  I do not know about the extent of that archive, its fate,
>> and future plans with the RFC 5620 institutions.  And does ICANN
>> support such archival activities?
>
> One should also consider the IETF Trust, or at least make the Trustees
> aware of the existence of such material.

The Trust is in the process of taking possession of the RFC Editor =20
physical (paper) archives, which are
at last report still at ISI in California.

We plan to keep it all in storage, either in California or here in =20
Virginia with the other physical Trust archives.

While the Trust archives can be and are accessed, they are at present =20=

not intended for routine access, simply for long-term storage.

Regards
Marshall


>
> Ray
> Trustee
>
>>
>> Kind regards,
>> Alfred H=CEnes.
>>
>> --=20
>> +------------------------=20
>> +--------------------------------------------+
>> | TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-=20
>> Phys.  |
>> | Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: =20
>> -18         |
>> | D-71254  Ditzingen     |  E-Mail:  ah@TR-=20
>> Sys.de                     |
>> +------------------------=20
>> +--------------------------------------------+
>>
>
>



From owner-namedroppers@ops.ietf.org  Thu Jan 21 08:20:53 2010
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Cc: william.allen.simpson@gmail.com, namedroppers@ops.ietf.org, internet-history@postel.org, iad@ietf.org, execd@iab.org, Marshall Eubanks <tme@americafree.tv>
Message-Id: <33079EE8-B30B-4038-B056-8EEBF15F3150@isoc.org>
From: Ray Pelletier <rpelletier@isoc.org>
To: =?ISO-8859-1?Q?Alfred_H=CEnes?= <ah@TR-Sys.de>
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Subject: Re: [dnsext] Ancient list archives
Date: Thu, 21 Jan 2010 10:07:43 -0500
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On Jan 21, 2010, at 9:44 AM, Alfred H=CEnes wrote:

> [[ With respect to the general nature of the topic, I copy selected
>   IETF administrative leadership: the IAD and the IAB Executive
>   director. ]]
>
> At Thu, 21 Jan 2010 07:08:25 -0500, William Allen Simpson wrote:
>> Andrew Sullivan wrote:
>>
>>   If anyone has access to pre-1990 archives of this (namedroppers)
>>   list, I bet such people's observations in the thread including
>>   the message [...]
>>
>> Sadly, I had a lot, but they were all printed on paper.  I was weary
>> of paying $180/month for a storage unit for my paper archives, and
>> recycled almost everything last April, including TCP and IP papers
>> from the late 1970s, figuring I'd never look at them again.  Sorry.
>
> Really sad.
>
> As a general wisdom -- not particular to Internet history -- :
>
> If you are in possession of material of potential interest for
> (current and future) historians, ensure that the material is
> conserved.
>
> If you have no other trustworthy possibility to ensure that, offer
> to donate the material to a competent public archive or library
> (library of a university, national library, the Library of Congress
> in the U.S., etc.).  As a surplus, offer helping them to properly
> catalogue the material to make it more easily accessible.
> Do that immediately if you want to get rid of the material (e.g.
> for similar reasons as pointed out above), and in any case, as a
> precautionary measure, lay down testamentary disposition to make
> the donation happen when you pass by (get in contact with them in
> advance to ensure you find a proper institution!).
>
> We should not ignore that the latter will become even more important
> in the future, with the Internet starting to survive its veterans
> and early documentation activists.
>
> AFAIK, the RFC Editor also has maintained a paper archive in the
> past.  I do not know about the extent of that archive, its fate,
> and future plans with the RFC 5620 institutions.  And does ICANN
> support such archival activities?

One should also consider the IETF Trust, or at least make the Trustees
aware of the existence of such material.

Ray
Trustee

>
> Kind regards,
>  Alfred H=CEnes.
>
> -- =20
>
> +------------------------=20
> +--------------------------------------------+
> | TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-=20
> Phys.  |
> | Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: =20
> -18         |
> | D-71254  Ditzingen     |  E-Mail:  ah@TR-=20
> Sys.de                     |
> +------------------------=20
> +--------------------------------------------+
>



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From owner-namedroppers@ops.ietf.org  Thu Jan 21 08:34:22 2010
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To: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>, william.allen.simpson@gmail.com
From: Olafur Gudmundsson <ogud@ogud.com>
Subject: Re: [dnsext] Ancient list archives
Cc: namedroppers@ops.ietf.org
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Full archive of namedroppers is available see:

>Randy Bush randy at psg.com
>Wed Jan 20 15:21:05 PST 2010
>
>Previous message: [ih] Dot Com etc
>Next message: [ih] internet-history Digest, Vol 39, Issue 7
>Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
> > The namedroppers list still exists (used for DNS policy issues).
> > However no one seems to have an archive earlier than 1990 (MARC.INFO).
>
>ftp://ftp.psg.com/pub/lists goes back to '83
>
>randy


>Really sad.
>
>As a general wisdom -- not particular to Internet history -- :
>
>If you are in possession of material of potential interest for
>(current and future) historians, ensure that the material is
>conserved.

As a amateur historian I also keep a full archive of namedroppers
and few other relevant mailing list.
IETF archives all mailing list but the namedroppers archive only goes
back to 2002.
ftp://ftp.ietf.org/ietf-mail-archive/namedroppers/

Both "official" archives have had outages during at some point
meaning that some messages have been dropped, thus it is wise to
consult both when looking for a particular message.
I try to back fill the psg archive when this has happened but there is out-age
from last year that I have not got around to fixing.

         Olafur




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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DNS Extensions Working Group of the IETF.


	Title           : DNS Zone Transfer Protocol (AXFR)
	Author(s)       : E. Lewis, A. Hoenes
	Filename        : draft-ietf-dnsext-axfr-clarify-13.txt
	Pages           : 28
	Date            : 2010-01-21

The Domain Name System standard mechanisms for maintaining coherent
servers for a zone consist of three elements.  One mechanism is the
Authoritative Transfer (AXFR) defined in RFC 1034 and RFC 1035.
The definition of AXFR has proven insufficient in detail, thereby
forcing implementations intended to be compliant to make assumptions,
impeding interoperability.  Yet today we have a satisfactory set of
implementations that do interoperate.  This document is a new
definition of AXFR -- new in the sense that it records an accurate
definition of an interoperable AXFR mechanism.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-dnsext-axfr-clarify-13.txt

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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
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Subject: [dnsext] Re: New Version Notification for draft-ietf-dnsext-axfr-clarify-13
To: namedroppers@ops.ietf.org
Date: Thu, 21 Jan 2010 18:28:52 +0100 (MEZ)
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Thanks Hendrik and the Tools team, the I-D submission process
now works smoothly for documents containing the most recent
boilerplate text.  After resubmission, the Secretariat wrote:


> A new version of I-D, draft-ietf-dnsext-axfr-clarify-13.txt has
> been successfuly submitted by Alfred Hoenes and posted to the IETF
> repository.
>
> Filename:        draft-ietf-dnsext-axfr-clarify
> Revision:        13
> Title:           DNS Zone Transfer Protocol (AXFR)
> Creation_date:   2010-01-18
> WG ID:           dnsext
> Number_of_pages: 28
>
> Abstract:
> The Domain Name System standard mechanisms for maintaining coherent
> servers for a zone consist of three elements.  One mechanism is the
> Authoritative Transfer (AXFR) defined in RFC 1034 and RFC 1035.
> The definition of AXFR has proven insufficient in detail, thereby
> forcing implementations intended to be compliant to make assumptions,
> impeding interoperability.  Yet today we have a satisfactory set of
> implementations that do interoperate.  This document is a new
> definition of AXFR -- new in the sense that it records an accurate
> definition of an interoperable AXFR mechanism.
>
>
> The IETF Secretariat.

The updated draft version incorporates the comments received
during WGLC and should represent the perceived consensus of the
discussion.

Since the draft traditionally did not contain a revision history,
here is the most recent state of my change log since version -12 :

   o  renamed trailing section "13. Editors' Addresses"
      to (unnumbered) "Authors' Addresses" to make happy
      idnits, the draft submission tool, and the RFC Editor;
      AH marked "Editor"; EL not marked; updated page 1 boilerplate
   o  Note d) in 2.1.1 shortened, content partially merged into 2.1.5,
      additional elaborations there; similar changes to 2.2.1 Note g)
      and 2.2.5  (based on WGLC comments from Andreas Gustafsson)
   o  Changed 1st para of 2.2 and deleted old Section 2.2.1;
      renumbered 2.2.2 thru 2.2.6 accordingly (now aligned with 2.1.*);
      added note in 4.1.1 to conserve some semantics of old 2.2.1
      (based on comment from Andreas Gustafsson and Bill Manning)
   o  Discussion of old single-RR-per-response behavior moved from
      3.1 to 2.2 and amended to describe the issue
      (based on comments and new text from Andreas Gustafsson)
   o  AD and CD bits in 2.2.1 changed to 'mbz'; old Note e) deleted
      (based on comments from Andreas Gustafsson)
   o  clarified objective (copy zone as served literally to secondary)
      and consequences for case-preserving name compression in 3. and
      3.4; requirement level for the latter demoted to SHOULD
      (comments from Brian Wellington and discussion with others
      including Andrew Sullivan and Paul Vixie)
   o  various editorial fixes and improvements (WGLC comments from
      Mark Andrews, Andreas Gustafsson, Niall O'Reilly)
   o  updated Acknowledgements


Thanks again for all reviews and comments received on-list and off-list.
Please verify that your comments have been addressed sufficiently.

The HTML version of the draft is available on the Tools pages at

  http://tools.IETF.ORG/html/draft-ietf-dnsext-axfr-clarify-13

and the diffs can be found at

  http://tools.IETF.ORG/rfcdiff?difftype=--hwdiff&url2=draft-ietf-dnsext-axfr-clarify-13.txt


Passing the token now over to Andrew ...



Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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From: "Rose, Scott W." <scott.rose@nist.gov>
To: "namedroppers@ops.ietf.org" <namedroppers@ops.ietf.org>
Date: Thu, 21 Jan 2010 13:21:05 -0500
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Proposed resolution to LC comments for
draft-ietf-dnsext-dnssec-registry-fixes

1.    Wording Change:  =B3implementation status=B2 not correct. (Brian
Wellington)

Fixed.  Text now uses the term =B3requirement status=B2 and =B3implementati=
on
requirement=B2 as necessary.

2.    Default status for newly specified algorithms based on document track
(Sam W)

Fixed.  Text now reads:
  =B3The requirement status for all new algorithms will be DISCRETIONARY
   unless a Standards Track document changes that (possibly including
   the Standards Track document defining the algorithm).  Only a
   Standards Track document may make an algorithm ENCOURAGED or
   MANDATORY or remove the MANDATORY or ENCOURAGED designation (to
   DISCOURAGED or OBSOLETE for example).=B2

This is also dependent on the new keywords draft.
=20
3.    Text on how current status levels were set (Sam W)

Possibly fixed.  Text indicates most of the status levels were obtained fro=
m
RFC 4034. Status of RSA/SHA-256 was set to ENCOURAGED as it is believed it
may become MANDATORY at some time.  The original status of RSA/MD5 is murky=
,
but OBSOLETE is the best term I guess:
=20
  =B3There are additional fixes to entries that are described in sub-
   section 2.1. The overall new registry table is in sub-section 2.2.
   The values for the status were obtained from [RFC4034] with updates
   for algorithms specified after the original DNSSEC specification.
   The status of algorithms marked OPTIONAL in [RFC4034] are changed to
   DISCRETIONARY as defined in
   [I-D.ogud-iana-protocol-maintenance-words].  The status of algorithms
   marked NOT RECOMMENDED in [RFC4034] are changed to OBSOLETE as
   defined in [I-D.ogud-iana-protocol-maintenance-words].=B2
=20
4.  Not from a comment but:  References in the table were updated to remove
obsolete RFC=B9s.  Mainly because idnits was complaining.  The ones removed
were RFC 3110, RFC 3755, and RFC 3537.

Did I forget anything?  There is the alg-allocation comment about reserving
some space, possibly requiring updating this doc to reflect that.

Scott
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Scott Rose
NIST
scottr@nist.gov
ph: +1 301-975-8439
Google Voice: +1-571-249-3671

http://www.dnsops.gov/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D




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Date: Thu, 21 Jan 2010 14:00:15 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: New Version Notification for draft-ietf-dnsext-axfr-clarify-13
Message-ID: <20100121190015.GW81286@shinkuro.com>
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Dear colleagues,

On Thu, Jan 21, 2010 at 06:28:52PM +0100, Alfred HÃ¶nes wrote:

> The updated draft version incorporates the comments received
> during WGLC and should represent the perceived consensus of the
> discussion.

As you are no doubt aware, we recently completed a WGLC on the
previous version of the document.  There was a fair amount of
discussion during LC, particularly on the casing issue (I say
"particularly" because I see discussion continues, which makes me
think the proposed text to face this isn't quite right yet).  I want
to make sure people agree with the text as it has been altered.

Therefore, I propose to wait for at least one week before sending this
document to the IESG.  If you had remarks during the
recently-concluded WGLC, _please_ check over the document or the diffs
and make sure your issues were addressed.

One week today is 28 January.  There is a faint chance that I will be
able to attend to this document then.  If not, I may not get to it
until some time that weekend, because I'll be travelling starting the
29th & will have limited connectivity.

If I hear nothing before I prepare the PROTO write up, I will assume
that those who raised issues have in fact read the new version and
approve.  I would prefer to hear positively from you, however, so if
you do actually check it please let me know.

Again, this is a fairly old draft.  I encourage those who haven't read
it to check it now, because the later we discover issues with it, the
more work we'll have to do to complete this work item.  Thanks to Ed
and Alfred for moving this ahead, and to the reviewers for poring over
the document.

Best regards,

Andrew.

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.


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me is Mary, can we get started? "I'm on this dating site - come in to me. <=
A=20
href=3D"http://YETTIOFF.INFO/index.php?idAff=3D136&action=3D3">Speed to vis=
it</A></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9B34.469ED720--


From dnsop-bounces@ietf.org  Thu Jan 21 23:27:17 2010
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Subject: The results of your email commands
From: dnsop-bounces@ietf.org
To: dnsext-archive@lists.ietf.org
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--===============0367560128==
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The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Unprocessed:
    tarted? "I'm on this dating site - come in to me. Speed to visit

- Done.


--===============0367560128==
Content-Type: message/rfc822
MIME-Version: 1.0

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To: <dnsext-archive@lists.ietf.org>
Subject: Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started? "I'm on this dating site - come in to me.
Date: Fri, 22 Jan 2010 08:26:55 +0100
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Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get s=
tarted? "I'm on this dating site - come in to me. Speed to visit
------=_NextPart_000_044C_01CA9B34.469ED720
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Content-Transfer-Encoding: quoted-printable

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<META content=3D"MSHTML 6.00.3790.1830" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DArial>Hi, I'm from Russia - a dream to live abroad, my na=
me is Mary, can we get started? "I'm on this dating site - come in to me. <=
A=20
href=3D"http://YETTIOFF.INFO/index.php?idAff=3D136&action=3D3">Speed to vis=
it</A></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9B34.469ED720--


--===============0367560128==--

From passionatingnb0@skimkayaks.com  Thu Jan 21 23:27:15 2010
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From: <dnsext-archive@lists.ietf.org>
To: <dnsext-archive@lists.ietf.org>
Subject: Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get started? "I'm on this dating site - come in to me.
Date: Fri, 22 Jan 2010 08:26:55 +0100
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This is a multi-part message in MIME format.

------=_NextPart_000_044C_01CA9B34.469ED720
Content-Type: text/plain;
	charset="UTF-8"
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Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get s=
tarted? "I'm on this dating site - come in to me. Speed to visit
------=_NextPart_000_044C_01CA9B34.469ED720
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<META content=3D"MSHTML 6.00.3790.1830" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DArial>Hi, I'm from Russia - a dream to live abroad, my na=
me is Mary, can we get started? "I'm on this dating site - come in to me. <=
A=20
href=3D"http://YETTIOFF.INFO/index.php?idAff=3D136&action=3D3">Speed to vis=
it</A></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9B34.469ED720--


From dnsext-archive@lists.ietf.org  Fri Jan 22 05:56:19 2010
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From dnsext-archive@ietf.org  Fri Jan 22 05:57:16 2010
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From dnsext-archive@ietf.org  Fri Jan 22 06:09:54 2010
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From: Danny Mayer <mayer@gis.net>
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CC: ogud@ogud.com, dnsop@ietf.org, namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: [DNSOP] Priming query transport selection
References: <201001132058.VAA11959@TR-Sys.de>
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Alfred HÎnes wrote:
> I apologize for cross-posting due to topical overlap.
> Please confine follow-up messages to the appropriate list.
> 
> 
> In the message to DNSOP regarding draft-ietf-dnsop-resolver-priming-02
> archived at
>   <http://www.IETF.ORG/mail-archive/web/dnsop/current/msg07843.html>,
> Olafur Gudmundsson scratched at a topic of interest to namedroppers
> as well; he wrote:
> 
>>  ...
>>
>> Background:
>> 26 signed glue records will require about 5K answer if each RRSet is
>> signed by a single 1024 bit RSA key.
>> This will never fit into an ENDS0 answer as number of implementations
>> have 4096 byte hard limit on answer size.
> 
> 
> Did you read the News these days?
> 
> An international team lead by the BSI (the "German NSA") and others
> has solved the RSA-768 challenge, and experts reportedly expect, due
> to significant progresses, that RSA-1024 will be solved in a rather
> short time, likely by the end of this year or so!
> 
> This means that we should immediately plan operationally for
> widespread use of 2048-bit RSA keys in the "near" future.
> 
> 
>> As of today all the root servers instances that my host reached
>> answered a TCP query.
>>
>> Proposed replacement text:
>>
>> |2.1.  Parameters of a Priming Query
>> |
>> |  A priming query MUST use a QNAME of "." and a QTYPE of NS, QCLASS
>> |  of IN, with RD bit set to 0, the source port of the query should
>> |  be randomly selected [RFC5452].
>> |
>> |  A DNSSEC aware resolver SHOULD sent the priming query over TCP.
>> |  If TCP is refused a different server SHOULD be tried, after 3 tries
>> |  the resolver SHOULD fall back on UDP.
>> |
>> |  A DNSSEC ignorant but EDNS0 capable, resolver SHOULD issue the
>> |  priming query over UDP, ENDS0 option MUST be included with buffer
>> |  size of 1220 or larger.  If the UDP query times out TCP SHOULD be
>> |  tried.
>> |
>> |  An EDNS0 ignorant resolver MUST issue the priming query over UDP.
>>
>> ...

I'm not sure I understand the point to this part. Since this is a draft
and you would be talking about the next versions of resolvers that would
be expect to support this (as opposed to existing ones) why would you
expect there to be any future resolver ignorant of DNSSEC? Aren't we
trying to make DNSSEC mandatory for future resolvers?

Danny




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Subject: Re: [dnsext] Re: [DNSOP] Priming query transport selection
To: mayer@gis.net
Date: Sun, 24 Jan 2010 17:23:24 +0100 (MEZ)
Cc: ogud@ogud.com, dnsop@ietf.org, namedroppers@ops.ietf.org
In-Reply-To: <4B5BDCCB.50504@gis.net> from Danny Mayer at Jan "24," 2010 "00:38:19" am
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Danny Mayer wrote, in a response sent to me, referring to
Olafur Gudmundsson's text proposal quoted in my posting on Jan 13:

>>> Proposed replacement text:
>>>
>>> |2.1.  Parameters of a Priming Query
>>> |
>>> |  A priming query MUST use a QNAME of "." and a QTYPE of NS, QCLASS
>>> |  of IN, with RD bit set to 0, the source port of the query should
>>> |  be randomly selected [RFC5452].
>>> |
>>> |  A DNSSEC aware resolver SHOULD sent the priming query over TCP.
>>> |  If TCP is refused a different server SHOULD be tried, after 3 tries
>>> |  the resolver SHOULD fall back on UDP.
>>> |
>>> |  A DNSSEC ignorant but EDNS0 capable, resolver SHOULD issue the
>>> |  priming query over UDP, ENDS0 option MUST be included with buffer
>>> |  size of 1220 or larger.  If the UDP query times out TCP SHOULD be
>>> |  tried.
>>> |
>>> |  An EDNS0 ignorant resolver MUST issue the priming query over UDP.
>>>
>>> ...
>
> I'm not sure I understand the point to this part. Since this is a draft
> and you would be talking about the next versions of resolvers that would
> be expect to support this (as opposed to existing ones) why would you
> expect there to be any future resolver ignorant of DNSSEC? Aren't we
> trying to make DNSSEC mandatory for future resolvers?
>
> Danny

Danny,
Please note that the quoted block of text wasn't mine, so maybe your
message ought to have be addressed primarily to its author.
But never mind.  It has arrived there and on the lists.

The primary goals of my posting were to point out that:

  - limiting the recommended priming query discussion and advice
    in teh Priming Query draft by a perspective on 1024-bit RSA keys
    and signatures is too narrow-headed if the advice shall last
    for more than a very small couple of years, and

  - with respect to message size issues and efficiency, DNSEXT
    should resume work on ECC keys and signatures for DNSSEC ASAP.

Regarding your argument agaibst Olafur's suggested text, I fear
there will be lots of resolvers for many years that cannot reasonably
be expected to be DNSSEC aware, i.e. performing DNSSEC validation.

I do not want to touch on policy issues -- whether CPE and end
systems are in a better place for providing useful trust by
performing DNSSEC validation than typical large-scale caching
resolvers provided and maintained by ISPs.

However:
DNSSEC is a huge code addition, in particular for embedded TCP/IP
implementations; the proliferation of signature algorithms we are
starting to admit will make things even more complicated.
In contrast, EDNS0 is a rather tiny addition providing general
utility and it indeed really should be supported by such
implementations.
Therefore, I believe that we should give valid advice for such
small-scale implementions as well -- they'll depend on working
priming queries in any case.

As pointed out by other folks in another current thread on DNSOP,
BCP documents should not restrict the advice they are giving to a
single mainstream scenario when the topic is more general in
nature, but better cover various important scenarios.
Thus, I indeed recommend to keep appropriate advice for DNSSEC
unaware resolvers in the Priming Query draft.

Kind regards,
  Alfred.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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--===============2026887863==
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MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Done.


--===============2026887863==
Content-Type: message/rfc822
MIME-Version: 1.0

Return-Path: <tweedledeedi14@julietclark.com>
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	tests=[BAYES_99=3.5, FH_HELO_EQ_D_D_D_D=1.597,
	FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888,
	FM_DDDD_TIMES_2=1.999, HELO_DYNAMIC_IPADDR2=4.395, HTML_MESSAGE=0.001,
	RAZOR2_CF_RANGE_51_100=0.5, RAZOR2_CF_RANGE_E4_51_100=1.5,
	RAZOR2_CF_RANGE_E8_51_100=1.5, RAZOR2_CHECK=0.5,
	RCVD_IN_BL_SPAMCOP_NET=1.96, RCVD_IN_PBL=0.905, RCVD_IN_XBL=3.033,
	RDNS_DYNAMIC=0.1, TVD_RCVD_IP=1.931, URIBL_BLACK=20,
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Message-ID: <000d01ca9d40$9a31c060$6400a8c0@tweedledeedi14>
From: <dnsext-archive@lists.ietf.org>
To: <dnsext-archive@lists.ietf.org>
Subject: If you are disappointed in its second half, bold, come in!
Date: Sun, 24 Jan 2010 19:00:12 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_044C_01CA9D40.9A31C060"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Windows Live Mail 14.0.8089.726
X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726

This is a multi-part message in MIME format.

------=_NextPart_000_044C_01CA9D40.9A31C060
Content-Type: text/plain;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

I can do for you is - what can not no girl! Click Here Please
------=_NextPart_000_044C_01CA9D40.9A31C060
Content-Type: text/html;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-2"=
>
<META content=3D"MSHTML 6.00.2800.1807" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DCalibri>I can do for you is - what can not no girl! <A=20
href=3D"http://termoshubanew.ru/index.php?idAff=3D136&action=3D3">Click Her=
e Please</A></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9D40.9A31C060--


--===============2026887863==--

From tweedledeedi14@julietclark.com  Sun Jan 24 14:00:34 2010
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Message-ID: <000d01ca9d40$9a31c060$6400a8c0@tweedledeedi14>
From: <dnsext-archive@lists.ietf.org>
To: <dnsext-archive@lists.ietf.org>
Subject: If you are disappointed in its second half, bold, come in!
Date: Sun, 24 Jan 2010 19:00:12 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_044C_01CA9D40.9A31C060"
X-Priority: 3
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X-Mailer: Microsoft Windows Live Mail 14.0.8089.726
X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726

This is a multi-part message in MIME format.

------=_NextPart_000_044C_01CA9D40.9A31C060
Content-Type: text/plain;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

I can do for you is - what can not no girl! Click Here Please
------=_NextPart_000_044C_01CA9D40.9A31C060
Content-Type: text/html;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-2"=
>
<META content=3D"MSHTML 6.00.2800.1807" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DCalibri>I can do for you is - what can not no girl! <A=20
href=3D"http://termoshubanew.ru/index.php?idAff=3D136&action=3D3">Click Her=
e Please</A></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9D40.9A31C060--


From repulsingy10@paradiseflowers.com  Sun Jan 24 17:11:51 2010
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Message-ID: <000d01ca9d5b$5545e830$6400a8c0@repulsingy10>
From: <dime-request@ietf.org>
To: <dime-request@ietf.org>
Subject: You have little joy in life? Lacks warmth and affection? Come to me.
Date: Sun, 24 Jan 2010 20:11:33 -0500
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_044C_01CA9D5B.5545E830"
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X-Mailer: Microsoft Windows Live Mail 14.0.8089.726
X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726

This is a multi-part message in MIME format.

------=_NextPart_000_044C_01CA9D5B.5545E830
Content-Type: text/plain;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

Hi, I'm from Russia - a dream to live abroad, my name is Mary, can we get s=
tarted? "I'm on this dating site - come in to me. Register
------=_NextPart_000_044C_01CA9D5B.5545E830
Content-Type: text/html;
	charset="iso-8859-2"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-2"=
>
<META content=3D"MSHTML 6.00.2900.2869" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DCalibri>Hi, I'm from Russia - a dream to live abroad, my =
name is Mary, can we get started? "I'm on this dating site - come in to me.=
 <A=20
href=3D"http://stroikaluks.ru/index.php?idAff=3D136&action=3D3">Register</A=
></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_044C_01CA9D5B.5545E830--


From digested@rubytex.com  Mon Jan 25 07:01:31 2010
Return-Path: <digested@rubytex.com>
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Message-ID: <000d01ca9dcf$28fb7640$6400a8c0@digested>
From: <disman-request@ietf.org>
To: <disman-request@ietf.org>
Subject: I can do for you is - what can not no girl!
Date: Mon, 25 Jan 2010 08:00:40 -0700
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01CA9DCF.28FB7640"
X-Priority: 3
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X-Mailer: Microsoft Outlook Express 6.00.3790.2663
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.2663

This is a multi-part message in MIME format.

------=_NextPart_000_0007_01CA9DCF.28FB7640
Content-Type: text/plain;
	charset="utf-8"
Content-Transfer-Encoding: quoted-printable

Want to know what the real Russian girls love and warmth? Click Here
------=_NextPart_000_0007_01CA9DCF.28FB7640
Content-Type: text/html;
	charset="utf-8"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8">
<META content=3D"MSHTML 6.00.3790.2663" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><FONT face=3DVerdana>Want to know what the real Russian girls love and=
 warmth? <A=20
href=3D"http://DUBHUMOR.COM/index.php?idAff=3D136&action=3D3">Click Here</A=
></FONT></DIV>
</BODY></HTML>

------=_NextPart_000_0007_01CA9DCF.28FB7640--


From synchronizedt6@justlottery.com  Mon Jan 25 07:02:17 2010
Return-Path: <synchronizedt6@justlottery.com>
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Received: from 71.43.176.1 by mail0.fluidhosting.com; Mon, 25 Jan 2010 07:02:06 -0800
Date: Mon, 25 Jan 2010 07:02:06 -0800
From: dnsext-archive@ietf.org
Subject: Find a Russian wife here. 
To: <dnsext-archive@ietf.org>
Message-ID: <000d01ca9dcf$5c1c9a90$6400a8c0@synchronizedt6>
MIME-Version: 1.0
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
X-Mailer: Microsoft Outlook Express 6.00.2900.2180
Content-type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original
Content-transfer-encoding: 7bit
X-Priority: 3
X-MSMail-priority: Normal

If you are disappointed in its second half, bold, come in!
http://DUBHUMOR.COM/index.php?idAff=136&action=3


From dhcwg-bounces@ietf.org  Mon Jan 25 07:02:18 2010
Return-Path: <dhcwg-bounces@ietf.org>
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Subject: The results of your email commands
From: dhcwg-bounces@ietf.org
To: dnsext-archive@ietf.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1521771989=="
Message-ID: <mailman.680.1264431737.4759.dhcwg@ietf.org>
Date: Mon, 25 Jan 2010 07:02:17 -0800
Precedence: bulk
X-BeenThere: dhcwg@ietf.org
X-Mailman-Version: 2.1.9
List-Id: <dhcwg.ietf.org>
X-List-Administrivia: yes
Sender: dhcwg-bounces@ietf.org
Errors-To: dhcwg-bounces@ietf.org

--===============1521771989==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.


- Unprocessed:
    http://DUBHUMOR.COM/index.php?idAff=136&action=3

- Done.


--===============1521771989==
Content-Type: message/rfc822
MIME-Version: 1.0

Return-Path: <synchronizedt6@justlottery.com>
X-Original-To: dhcwg-request@core3.amsl.com
Delivered-To: dhcwg-request@core3.amsl.com
Received: from localhost (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id 61D663A68E8;
	Mon, 25 Jan 2010 07:02:17 -0800 (PST)
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X-Spam-Flag: NO
X-Spam-Score: -45.723
X-Spam-Level: 
X-Spam-Status: No, score=-45.723 tagged_above=-999 required=5
	tests=[BAYES_99=3.5, FH_FAKE_RCVD_LINE_B=5.777,
	FH_HELO_EQ_D_D_D_D=1.597, FH_HOST_EQ_D_D_D_D=0.765,
	FM_DDDD_TIMES_2=1.999, HELO_DYNAMIC_IPADDR=2.426,
	RAZOR2_CF_RANGE_51_100=0.5, RAZOR2_CF_RANGE_E8_51_100=1.5,
	RAZOR2_CHECK=0.5, RCVD_IN_BL_SPAMCOP_NET=1.96,
	RCVD_IN_SORBS_WEB=0.619, RCVD_IN_XBL=3.033, RDNS_DYNAMIC=0.1,
	STOX_REPLY_TYPE=0.001, URIBL_BLACK=20, URIBL_JP_SURBL=10,
	USER_IN_WHITELIST=-100]
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Date: Mon, 25 Jan 2010 07:02:06 -0800
From: dnsext-archive@ietf.org
Subject: Find a Russian wife here. 
To: <dnsext-archive@ietf.org>
Message-ID: <000d01ca9dcf$5c1c9a90$6400a8c0@synchronizedt6>
MIME-Version: 1.0
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
X-Mailer: Microsoft Outlook Express 6.00.2900.2180
Content-type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original
Content-transfer-encoding: 7bit
X-Priority: 3
X-MSMail-priority: Normal

If you are disappointed in its second half, bold, come in!
http://DUBHUMOR.COM/index.php?idAff=136&action=3


--===============1521771989==--

From dnsop-bounces@ietf.org  Mon Jan 25 07:02:19 2010
Return-Path: <dnsop-bounces@ietf.org>
X-Original-To: dnsext-archive@ietf.org
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Subject: The results of your email commands
From: dnsop-bounces@ietf.org
To: dnsext-archive@ietf.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1501009968=="
Message-ID: <mailman.682.1264431737.4759.dnsop@ietf.org>
Date: Mon, 25 Jan 2010 07:02:17 -0800
Precedence: bulk
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.9
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
X-List-Administrivia: yes
Sender: dnsop-bounces@ietf.org
Errors-To: dnsop-bounces@ietf.org

--===============1501009968==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.


- Unprocessed:
    http://DUBHUMOR.COM/index.php?idAff=136&action=3

- Done.


--===============1501009968==
Content-Type: message/rfc822
MIME-Version: 1.0

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Subject: Find a Russian wife here. 
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--===============0451225454==--

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DNS Extensions Working Group of the IETF.


	Title           : Cryptographic Algorithm Identifier Allocation for DNSSEC
	Author(s)       : P. Hoffman
	Filename        : draft-ietf-dnsext-dnssec-alg-allocation-02.txt
	Pages           : 6
	Date            : 2010-01-25

This document specifies how DNSSEC cryptographic algorithm
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	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

No woman can make a better wife than a Russian lady =96 pick one here.  100=
% check - please visit
------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/html;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3DWindows-125=
2">
<META content=3D"MSHTML 6.00.2900.2180" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D"#ffffff">
<DIV><FONT face=3DCalibri size=3D3>No woman can make a better wife than a R=
ussian lady =96 pick one here.  <A=20
href=3D"http://ADREKAD.INFO/index.php?idAff=3D136&action=3D3">100% check - =
please visit</A></FONT></DIV></BODY></HTML>

------=_NextPart_000_0007_01CA9E99.3FDE0420--


From edu-discuss-bounces@ietf.org  Tue Jan 26 07:07:20 2010
Return-Path: <edu-discuss-bounces@ietf.org>
X-Original-To: dnsext-archive@lists.ietf.org
Delivered-To: ietfarch-dnsext-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 6EB163A6803 for <dnsext-archive@lists.ietf.org>; Tue, 26 Jan 2010 07:07:20 -0800 (PST)
Subject: The results of your email commands
From: edu-discuss-bounces@ietf.org
To: dnsext-archive@lists.ietf.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1335557852=="
Message-ID: <mailman.1205.1264518439.4759.edu-discuss@ietf.org>
Date: Tue, 26 Jan 2010 07:07:19 -0800
Precedence: bulk
X-BeenThere: edu-discuss@ietf.org
X-Mailman-Version: 2.1.9
List-Id: IETF Education Discussion <edu-discuss.ietf.org>
X-List-Administrivia: yes
Sender: edu-discuss-bounces@ietf.org
Errors-To: edu-discuss-bounces@ietf.org

--===============1335557852==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Unprocessed:
    % check - please visit

- Done.


--===============1335557852==
Content-Type: message/rfc822
MIME-Version: 1.0

Return-Path: <inflectionalvlq@rsr-services.com>
X-Original-To: edu-discuss-request@core3.amsl.com
Delivered-To: edu-discuss-request@core3.amsl.com
Received: from localhost (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id 2AE8E3A688B;
	Tue, 26 Jan 2010 07:07:18 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -34.166
X-Spam-Level: 
X-Spam-Status: No, score=-34.166 tagged_above=-999 required=5
	tests=[BAYES_99=3.5, FH_HELO_EQ_D_D_D_D=1.597,
	FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888,
	FM_DDDD_TIMES_2=1.999, GB_I_LETTER=-2, HELO_DYNAMIC_HCC=4.295,
	HELO_DYNAMIC_IPADDR2=4.395, HELO_EQ_BR=0.955, HELO_EQ_DSL=1.129,
	HELO_EQ_TELESP=1.245, HOST_EQ_BR=1.295, HTML_MESSAGE=0.001,
	RAZOR2_CF_RANGE_51_100=0.5, RAZOR2_CF_RANGE_E4_51_100=1.5,
	RAZOR2_CF_RANGE_E8_51_100=1.5, RAZOR2_CHECK=0.5,
	RCVD_IN_BL_SPAMCOP_NET=1.96, RCVD_IN_PBL=0.905,
	RCVD_IN_SORBS_DUL=0.877, RCVD_IN_SORBS_WEB=0.619, RCVD_IN_XBL=3.033,
	RDNS_DYNAMIC=0.1, SARE_RECV_SPAM_DOMN02=1.666,
	SARE_SUB_GOOD_DAY=0.679, TVD_RCVD_IP=1.931, URIBL_BLACK=20,
	URIBL_JP_SURBL=10, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([64.170.98.32])
	by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id HIssm2IsNscr; Tue, 26 Jan 2010 07:07:17 -0800 (PST)
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Received: from 201.26.8.125 by rsr-services.com.s9b1.psmtp.com; Tue, 26 Jan 2010 13:07:17 -0300
Message-ID: <000d01ca9e99$3fde0420$6400a8c0@inflectionalvlq>
From: dnsext-archive@lists.ietf.org
To: <dnsext-archive@lists.ietf.org>
Subject: Good day, I accidentally found a letter from you, I remember how we communicated with you.
Date: Tue, 26 Jan 2010 13:07:17 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0007_01CA9E99.3FDE0420"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1478
X-MimeOLE: Produced By Microsoft MimeOLE 6.00.2800.1478

This is a multi-part message in MIME format.

------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/plain;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

No woman can make a better wife than a Russian lady =96 pick one here.  100=
% check - please visit
------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/html;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3DWindows-125=
2">
<META content=3D"MSHTML 6.00.2900.2180" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D"#ffffff">
<DIV><FONT face=3DCalibri size=3D3>No woman can make a better wife than a R=
ussian lady =96 pick one here.  <A=20
href=3D"http://ADREKAD.INFO/index.php?idAff=3D136&action=3D3">100% check - =
please visit</A></FONT></DIV></BODY></HTML>

------=_NextPart_000_0007_01CA9E99.3FDE0420--


--===============1335557852==--

From ecrit-bounces@ietf.org  Tue Jan 26 07:07:20 2010
Return-Path: <ecrit-bounces@ietf.org>
X-Original-To: dnsext-archive@lists.ietf.org
Delivered-To: ietfarch-dnsext-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 7C16C3A6803 for <dnsext-archive@lists.ietf.org>; Tue, 26 Jan 2010 07:07:20 -0800 (PST)
Subject: The results of your email commands
From: ecrit-bounces@ietf.org
To: dnsext-archive@lists.ietf.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============0394303407=="
Message-ID: <mailman.1207.1264518439.4759.ecrit@ietf.org>
Date: Tue, 26 Jan 2010 07:07:19 -0800
Precedence: bulk
X-BeenThere: ecrit@ietf.org
X-Mailman-Version: 2.1.9
List-Id: <ecrit.ietf.org>
X-List-Administrivia: yes
Sender: ecrit-bounces@ietf.org
Errors-To: ecrit-bounces@ietf.org

--===============0394303407==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Unprocessed:
    % check - please visit

- Done.


--===============0394303407==
Content-Type: message/rfc822
MIME-Version: 1.0

Return-Path: <inflectionalvlq@rsr-services.com>
X-Original-To: ecrit-request@core3.amsl.com
Delivered-To: ecrit-request@core3.amsl.com
Received: from localhost (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id 2AE8E3A688B;
	Tue, 26 Jan 2010 07:07:18 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -34.166
X-Spam-Level: 
X-Spam-Status: No, score=-34.166 tagged_above=-999 required=5
	tests=[BAYES_99=3.5, FH_HELO_EQ_D_D_D_D=1.597,
	FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888,
	FM_DDDD_TIMES_2=1.999, GB_I_LETTER=-2, HELO_DYNAMIC_HCC=4.295,
	HELO_DYNAMIC_IPADDR2=4.395, HELO_EQ_BR=0.955, HELO_EQ_DSL=1.129,
	HELO_EQ_TELESP=1.245, HOST_EQ_BR=1.295, HTML_MESSAGE=0.001,
	RAZOR2_CF_RANGE_51_100=0.5, RAZOR2_CF_RANGE_E4_51_100=1.5,
	RAZOR2_CF_RANGE_E8_51_100=1.5, RAZOR2_CHECK=0.5,
	RCVD_IN_BL_SPAMCOP_NET=1.96, RCVD_IN_PBL=0.905,
	RCVD_IN_SORBS_DUL=0.877, RCVD_IN_SORBS_WEB=0.619, RCVD_IN_XBL=3.033,
	RDNS_DYNAMIC=0.1, SARE_RECV_SPAM_DOMN02=1.666,
	SARE_SUB_GOOD_DAY=0.679, TVD_RCVD_IP=1.931, URIBL_BLACK=20,
	URIBL_JP_SURBL=10, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([64.170.98.32])
	by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id HIssm2IsNscr; Tue, 26 Jan 2010 07:07:17 -0800 (PST)
Received: from 201-26-8-125.dsl.telesp.net.br (201-26-8-125.dsl.telesp.net.br [201.26.8.125])
	by core3.amsl.com (Postfix) with ESMTP id C1F493A6803;
	Tue, 26 Jan 2010 07:07:16 -0800 (PST)
Received: from 201.26.8.125 by rsr-services.com.s9b1.psmtp.com; Tue, 26 Jan 2010 13:07:17 -0300
Message-ID: <000d01ca9e99$3fde0420$6400a8c0@inflectionalvlq>
From: dnsext-archive@lists.ietf.org
To: <dnsext-archive@lists.ietf.org>
Subject: Good day, I accidentally found a letter from you, I remember how we communicated with you.
Date: Tue, 26 Jan 2010 13:07:17 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0007_01CA9E99.3FDE0420"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1478
X-MimeOLE: Produced By Microsoft MimeOLE 6.00.2800.1478

This is a multi-part message in MIME format.

------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/plain;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

No woman can make a better wife than a Russian lady =96 pick one here.  100=
% check - please visit
------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/html;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3DWindows-125=
2">
<META content=3D"MSHTML 6.00.2900.2180" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D"#ffffff">
<DIV><FONT face=3DCalibri size=3D3>No woman can make a better wife than a R=
ussian lady =96 pick one here.  <A=20
href=3D"http://ADREKAD.INFO/index.php?idAff=3D136&action=3D3">100% check - =
please visit</A></FONT></DIV></BODY></HTML>

------=_NextPart_000_0007_01CA9E99.3FDE0420--


--===============0394303407==--

From edu-team-bounces@ietf.org  Tue Jan 26 07:07:20 2010
Return-Path: <edu-team-bounces@ietf.org>
X-Original-To: dnsext-archive@lists.ietf.org
Delivered-To: ietfarch-dnsext-archive@core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 764923A688B for <dnsext-archive@lists.ietf.org>; Tue, 26 Jan 2010 07:07:20 -0800 (PST)
Subject: The results of your email commands
From: edu-team-bounces@ietf.org
To: dnsext-archive@lists.ietf.org
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============1719491761=="
Message-ID: <mailman.1206.1264518439.4759.edu-team@ietf.org>
Date: Tue, 26 Jan 2010 07:07:19 -0800
Precedence: bulk
X-BeenThere: edu-team@ietf.org
X-Mailman-Version: 2.1.9
List-Id: IETF Education Team <edu-team.ietf.org>
X-List-Administrivia: yes
Sender: edu-team-bounces@ietf.org
Errors-To: edu-team-bounces@ietf.org

--===============1719491761==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit

The results of your email command are provided below. Attached is your
original message.

- Results:
    Ignoring non-text/plain MIME parts

- Unprocessed:
    % check - please visit

- Done.


--===============1719491761==
Content-Type: message/rfc822
MIME-Version: 1.0

Return-Path: <inflectionalvlq@rsr-services.com>
X-Original-To: edu-team-request@core3.amsl.com
Delivered-To: edu-team-request@core3.amsl.com
Received: from localhost (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id 2AE8E3A688B;
	Tue, 26 Jan 2010 07:07:18 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -34.166
X-Spam-Level: 
X-Spam-Status: No, score=-34.166 tagged_above=-999 required=5
	tests=[BAYES_99=3.5, FH_HELO_EQ_D_D_D_D=1.597,
	FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888,
	FM_DDDD_TIMES_2=1.999, GB_I_LETTER=-2, HELO_DYNAMIC_HCC=4.295,
	HELO_DYNAMIC_IPADDR2=4.395, HELO_EQ_BR=0.955, HELO_EQ_DSL=1.129,
	HELO_EQ_TELESP=1.245, HOST_EQ_BR=1.295, HTML_MESSAGE=0.001,
	RAZOR2_CF_RANGE_51_100=0.5, RAZOR2_CF_RANGE_E4_51_100=1.5,
	RAZOR2_CF_RANGE_E8_51_100=1.5, RAZOR2_CHECK=0.5,
	RCVD_IN_BL_SPAMCOP_NET=1.96, RCVD_IN_PBL=0.905,
	RCVD_IN_SORBS_DUL=0.877, RCVD_IN_SORBS_WEB=0.619, RCVD_IN_XBL=3.033,
	RDNS_DYNAMIC=0.1, SARE_RECV_SPAM_DOMN02=1.666,
	SARE_SUB_GOOD_DAY=0.679, TVD_RCVD_IP=1.931, URIBL_BLACK=20,
	URIBL_JP_SURBL=10, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([64.170.98.32])
	by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id HIssm2IsNscr; Tue, 26 Jan 2010 07:07:17 -0800 (PST)
Received: from 201-26-8-125.dsl.telesp.net.br (201-26-8-125.dsl.telesp.net.br [201.26.8.125])
	by core3.amsl.com (Postfix) with ESMTP id C1F493A6803;
	Tue, 26 Jan 2010 07:07:16 -0800 (PST)
Received: from 201.26.8.125 by rsr-services.com.s9b1.psmtp.com; Tue, 26 Jan 2010 13:07:17 -0300
Message-ID: <000d01ca9e99$3fde0420$6400a8c0@inflectionalvlq>
From: dnsext-archive@lists.ietf.org
To: <dnsext-archive@lists.ietf.org>
Subject: Good day, I accidentally found a letter from you, I remember how we communicated with you.
Date: Tue, 26 Jan 2010 13:07:17 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0007_01CA9E99.3FDE0420"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1478
X-MimeOLE: Produced By Microsoft MimeOLE 6.00.2800.1478

This is a multi-part message in MIME format.

------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/plain;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

No woman can make a better wife than a Russian lady =96 pick one here.  100=
% check - please visit
------=_NextPart_000_0007_01CA9E99.3FDE0420
Content-Type: text/html;
	charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3DWindows-125=
2">
<META content=3D"MSHTML 6.00.2900.2180" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D"#ffffff">
<DIV><FONT face=3DCalibri size=3D3>No woman can make a better wife than a R=
ussian lady =96 pick one here.  <A=20
href=3D"http://ADREKAD.INFO/index.php?idAff=3D136&action=3D3">100% check - =
please visit</A></FONT></DIV></BODY></HTML>

------=_NextPart_000_0007_01CA9E99.3FDE0420--


--===============1719491761==--

From owner-namedroppers@ops.ietf.org  Tue Jan 26 07:38:23 2010
Return-Path: <owner-namedroppers@ops.ietf.org>
X-Original-To: ietfarch-dnsext-archive@core3.amsl.com
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From: Internet-Drafts@ietf.org
To: i-d-announce@ietf.org
Cc: namedroppers@ops.ietf.org
Subject: [dnsext] I-D Action:draft-ietf-dnsext-rfc3597-bis-01.txt 
Content-Type: Multipart/Mixed; Boundary="NextPart"
Mime-Version: 1.0
Message-Id: <20100126153001.B473F3A67AE@core3.amsl.com>
Date: Tue, 26 Jan 2010 07:30:01 -0800 (PST)
Sender: owner-namedroppers@ops.ietf.org
Precedence: bulk
List-ID: <namedroppers.ops.ietf.org>
List-Unsubscribe: To unsubscribe send a message to namedroppers-request@ops.ietf.org with
List-Unsubscribe: the word 'unsubscribe' in a single line as the message text body.
List-Archive: <http://ops.ietf.org/lists/namedroppers/>

--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DNS Extensions Working Group of the IETF.


	Title           : Handling of Unknown DNS Resource Record (RR) Types
	Author(s)       : A. Gustafsson
	Filename        : draft-ietf-dnsext-rfc3597-bis-01.txt
	Pages           : 7
	Date            : 2010-01-26

Extending the Domain Name System (DNS) with new Resource Record (RR)
types should not requires changes to name server software.  This
document specifies how new RR types are transparently handled by DNS
software.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-dnsext-rfc3597-bis-01.txt

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

--NextPart
Content-Type: Message/External-body;
	name="draft-ietf-dnsext-rfc3597-bis-01.txt";
	site="ftp.ietf.org";
	access-type="anon-ftp";
	directory="internet-drafts"

Content-Type: text/plain
Content-ID:     <2010-01-26072459.I-D@ietf.org>

--NextPart--


From dnsfopp@verizon.net  Tue Jan 26 08:12:06 2010
Return-Path: <dnsfopp@verizon.net>
X-Original-To: ietfarch-dnsext-archive@core3.amsl.com
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From harridang7@tecnologica.com  Tue Jan 26 10:27:22 2010
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From owner-namedroppers@ops.ietf.org  Wed Jan 27 03:19:46 2010
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Subject: [dnsext] draft-ietf-dnsext-dnssec-alg-allocation-02 downrefs
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Revisiting more closely the newly updated I-D,
    draft-ietf-dnsext-dnssec-alg-allocation-02
and the current state of the DNSSEC IANA registry,
I found a few non-(meta-)technical issues overlooked
in the past, where discussion focussed on the intended
policy change and its description.

In order to avoid delays later in the process, it might be
desirable to address the details given below in item (1)
and (2) now; item (3) recommends supplementary cleanup
operations for the IANA registry, based on item (2).


(1)  Copyright Notice

The current draft uses the pre-RFC5378 IPR clause.
That will certainly be challenged by the RFC Editor (which is
obliged to do so).  Since I see no reason to use that clause
(the entire draft is new), I suggest to drop the last paragraph
of the Copyright Notice now, in order to ensure a more smooth
progressing on the document later in the process.


(2)  Front matter, Normative Downrefs, etc.

The draft lists [RFC2535] and [RFC3755] as Normative Refs.
Both RFCs have been obsoleted by RFC 4033..4035.

Therefore, neither RFC 2535 nor RFC 3755 need to be formally
"Updated" by the draft -- they already are "Obsoleted".

Also, the Introduction of the draft could be understood
as if RFC 2535 (and maybe RFC 3755) still were the 'home'
of the IANA "DNS Security Algorithm Numbers" registry.

However, notwithstanding the wishy-washy IANA Considerations
(plus Appendix A) of RFC 4034, this registry has essentially
been re-parented to RFC 4034 by IANA.

The only place where the draft makes reference to [RFC2535] and
[RFC3755] is the Introduction.  This also indicates that these
references should be listed as Informative.
Furthermore, the text in the Introduction should be wordsmithed
a bit to better reflect the temporal relationship and the
current 'ownership' of the registry

Proposed changes:

a)  Section 1 -- Introduction

The draft says (full text in Section 1):

   [RFC2535] specifies that that IANA registry for DNS Security
   Algorithm Numbers be updated by IETF Standards Action only, with the
   exception of two values 253 and 254.  In essence, this means that for
   an algorithm to get its own entry in the registry, the algorithm must
   be defined in an RFC on the Standards Track as defined in [RFC2026].
   The requirement from RFC 2535 is repeated in [RFC3755] and [RFC4034].

   RFC 2535 allows algorithms that are not on the Standards Track to use
   private values 253 and 254 in signatures.  In each case, an
   unregistered private name must be included with each use of the
   algorithm in order to differentiate different algorithms that use the
   value.

I propose the following revised version (changes tagged):

                     v
|  [RFC2535] specified that that IANA registry for DNS Security
   Algorithm Numbers be updated by IETF Standards Action only, with the
   exception of two values 253 and 254.  In essence, this means that for
   an algorithm to get its own entry in the registry, the algorithm must
   be defined in an RFC on the Standards Track as defined in [RFC2026].
|  The requirement from RFC 2535 is repeated in [RFC3755] and then in
|  [RFC4034], the current owner of the registry.
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^              ^^^^^^^^
       vvvv
|  RFC 4034 allows algorithms that are not on the Standards Track to use
   private values 253 and 254 in signatures.  In each case, an
   unregistered private name must be included with each use of the
   algorithm in order to differentiate different algorithms that use the
   value.

b)  Section 6 -- References

Demote entries [RFC2535] and [RFC3755] from Normative to Informative.


(3)  Supplementary IANA Considerations (Section 4)

Maybe the IANA 'sanitizing' actions described below can be achieved
via interaction of the chairs with IANA without changes of the draft.

a)
IANA still lists "[RFC3755]" as a second parent of the registry.

In order to avoid potential confusion on the satus of obsoleted RFCs,
I suggest that the draft advises IANA to drop that reference in the
registry heading (thus only listing "[RFC4034]" there).

b) Refs for Algo Numbers 253 and 254

IMO, the normative statement currently in force on these
'Private algorithms' code points is in Appendix A.1.1 of RFC 4034.
However, IANA still lists  "RFC3755][RFC2535]"  as the normative
references for these code points.

I suggest that IANA should be advised to either add [RFC4034]
to these references, or -- much better IMO -- replace these
references by "[RFC4034]" (doing so would remove the last
remaining refs to RFC 2535 from the IANA registry)..


In case a) and b) cannot be achieved without a document, here is
suggested text to be appended to Section 4):

|  IANA is asked to no longer indicate [RFC3755] as one of the
|  owners of the registry; [RFC4034] is the sole current owner.
|  Also, [RFC4034] should be listed as the Reference for Algorithm
|  Numbers 253 and 254 -- the precise current specification of these
|  code points can be found in Appendix A.1.1 of [RFC 4034].


Kind regards,
  Alfred HÎnes.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001271230.NAA07971@TR-Sys.de>
Subject: [dnsext] draft-hoffman-dnssec-ecdsa-01
To: paul.hoffman@vpnc.org
Date: Wed, 27 Jan 2010 13:30:44 +0100 (MEZ)
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I have a few technical points to be discussed for the DNSSEC
EDCDA draft, draft-hoffman-dnssec-ecdsa-01.


(1)  bit string vs. octet strings

Cryptographers are used to think in bit strings of arbitrary
bit size.  DNS folks usually deal with octet strings.

Since the introduction of bit strings does not incur any visible
benefit here, I suggest to avoid the notion of bit strings entirely
throughout the draft and use octet string oriented language and
octet string sizes for field descriptions.


(2)  representation of EC keys

Section 3 of the draft says (in its first paragraph):

|  ECDSA public keys consist of a single value, called "Q" in FIPS
|  186-3.  In DNSSEC keys, Q is a simple bit string that represents
|  the uncompressed form of a curve point.

This is by far underspecified for the intended audience of this memo.

Section 2.3.3 of the SEC-1 Standard specifies the precise algorithm
to convert an EC point to a 'normalized' octet string.
This algorithm is widely adopted (IEEE, ANSI, NIST, IETF PKIX, etc.).
Making explicit reference to the resulting data format should
provide benefits for re-using existing crypto-APIs as well.

I recommend to normatively quote this specification in a similar
way as it is done in various new RFCs, including this week's
RFC 575? series.

Further, the restriction to uncompressed form seems unnecessary,
or even detrimental to the intended benefit of savings in DNS
response packet size as well as consumed bandwidth and delay.
The use of the compressed form essentially would cut down the
EC key size to half the size of the uncompressed form.

Note that generation of the compressed form is trivial, and
verifiers will perhaps prefer to expand it on receipt or first use.
The additional overhead incurred at the recipient (essentially
one GF(p) square root operation) is needed only once, and hence
can be amortized over multiple subsequent signature verification
operations.

The internal form of the keys should be transparent to DNS data
management and on-the-wire operations.
Since raising the requirements level for resolvers at a later stage
would be very problematic, I strongly recommend to provide a future-
proof specification, and hence my personal preference would be for a
"MUST implement" requirement for the compressed form of EC public
keys for signature verifiers, and a "SHOULD implement" for signers.

The draft text also is silent about the 'quality' requirements.
SEC-1 and various NIST publications contain verification procedures
and requirements for key generators, signers, and verifiers.
Such requirements are already imported in recent IETF documents,
cf. the abovementioned RFC 575? series.
I suggest that the draft be amended by related normative text,
after discussion of the assurance level the WG deems needed for
this application of ECC.


(3)  Precision if data element/field specification

Given the intended audience of the draft, the size of the data
elements used in the specification should be made explicit.

I suggest to introduce a parameter 'm' (this is 'mlen' in SEC-1)
into the table in Section 3 and make systematical use of it in
Section 4.



Combined Proposal for Section 3 -- ECDSA Parameters

OLD:

   Verifying ECDSA signatures requires agreement between the signer and
   the verifier of the parameters used.  FIPS 186-3 [FIPS-186-3] lists
   some NIST-recommended elliptic curves.  These are the same curves as
   listed in RFC 5114 [RFC5114].  The curves used in this document are:

   FIPS 186-3                  RFC 5114
   ------------------------------------------------------------------
   P-224 (Section D.1.2.2)     224-bit Random ECP Group (Section 2.5)
   P-256 (Section D.1.2.3)     256-bit Random ECP Group (Section 2.6)
   P-384 (Section D.1.2.4)     384-bit Random ECP Group (Section 2.7)

NEW:

   Verifying ECDSA signatures requires agreement between the signer and
|  the verifier of the parameters used.  For the purpose of DNSSEC, this
|  is implicitely achieved by use of dedicated algorithm numbers carried
|  in the RDATA of DNSSEC resource records.  For the sake of improved
|  interoperability, the number of options should be kept small.
|
   FIPS 186-3 [FIPS-186-3] lists some NIST-recommended elliptic curves.
|  These are the same curves as listed in RFC 5114 [RFC5114].  We denote
|  the octet size of the integers used in the underlying MODP arithmetic
|  by "m" for easy use in field specifications below.  The curves used
|  in this document (and being assigned distinct algorithm numbers by
|  IANA per Section 7 below) are:

|  FIPS 186-3               RFC 5114                                 m
|  -------------------------------------------------------------------
|  P-224 (Section D.1.2.2)  224-bit Random ECP Group (Section 2.5)  28
|  P-256 (Section D.1.2.3)  256-bit Random ECP Group (Section 2.6)  32
|  P-384 (Section D.1.2.4)  384-bit Random ECP Group (Section 2.7)  48


Combined Proposal for Section 4 -- DNSKEY and RRSIG Resource Records for ECDSA

1st para:

OLD:

   ECDSA public keys consist of a single value, called "Q" in FIPS
   186-3.  In DNSSEC keys, Q is a simple bit string that represents the
   uncompressed form of a curve point.

NEW:

   ECDSA public keys consist of a single value, called "Q" in FIPS
|  186-3.  In DNSSEC keys, Q is an octet string that represents the
|  compressed or uncompressed form of a curve point and is formed by
|  application of the algorithm specified in Section 2.3.3 of [SEC1].
|  Note that while the uncompressed form is an octet string of size 2m+1;
|  the compressed form is comprised of m+1 octets.
|
|  [[  add language on domain parameter and key verification ]]
|
|  [[  add language on implementation requirements
|      for signers and verifiers (resolvers)  ]]

[[ add normative ref to SEC-1, 2009 edition ]]

2nd para:

OLD:

   The ECDSA signature is the combination of two non-negative integers,
   called "r" and "s" in FIPS 186-3.  The two integers, each of which is
   formatted as a simple bit string, are combined into a single longer
   bit string for DNSSEC as the concatenation "r | s".

NEW:

   The ECDSA signature is the combination of two non-negative integers,
   called "r" and "s" in FIPS 186-3.  The two integers, each of which is
|  formatted as an octet string (in network byte order) of size m, are
|  combined for DNSSEC into a single octet string of size 2*m as the
   concatenation "r | s".


Kind regards,
  Alfred HÎnes.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



From owner-namedroppers@ops.ietf.org  Wed Jan 27 07:22:22 2010
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Message-Id: <201001271512.QAA08220@TR-Sys.de>
Subject: [dnsext] polishing of draft-ietf-dnsext-rfc3597-bis-01
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A few notes on the revised "Handling of Unknown RR Types" draft,
draft-ietf-dnsext-rfc3597-bis-01.

First of all, thanks to Andreas for acting on the previous comments.
It looks like this draft is almost ready for WGLC.


(1)  Definitions

The draft has a useful Section 2, "Definitions".
However, the definition of "well-known RR type" is buried in
Section 4.  I suggest to move that definition into Section 2
and adjust the text in Section 4 accordingly.  For instance:

Append a new paragraph to Section 2:

   A "RR of well-known type" is hereby specified as having one of the
   RR types defined in [RFC1035].  (This term has been introduced by
   [RFC3597] and is not changed herby.)

Edit the 2nd paragraph of Section 4:

   To avoid such corruption, servers MUST NOT compress domain names
   embedded in the RDATA of types that are class-specific or not well-
   known.  This requirement was stated in [RFC1123] without defining the
|  term "well-known"; it is hereby specified that only the RR types
|  defined in [RFC1035] are to be considered "well-known".
---
   To avoid such corruption, servers MUST NOT compress domain names
   embedded in the RDATA of types that are class-specific or not well-
   known.  This requirement was stated in [RFC1123] without defining the
|  term "well-known" (now introduced in Section 2 above).


(2)  Text Representation -- format rules

The list of 'word' in Section 5 might be improved visually
by making use of "symbols" type list format, e.g. using dashes
or asterisks.

Also, guided by the example at the end of the section, I suggest
to refer to the RFC 1035 rules for line folding (using parentheses).
The introductory clause only talks about white space; so some
elaborations as to what is regarded white space here seem to be
appropriate.  (Similarity to the "CFWS" construct in email!)
After re-reading the related part of RFC 1035, I therefore also
suggest adding a note that recalls the possibility of semicolon-
delimited end-of-line comments as defined in RFC 1035.

These additions hopefully make the specification here more self-
contained (last para of Section 1!) and admonish implementers to not
forget the general rules.  :-)

Cumulative proposed edits:

   The RDATA section of an RR of unknown type is represented as a
   sequence of white space separated words as follows:

      The special token \# (a backslash immediately followed by a hash
      sign), which identifies the RDATA as having the generic encoding
      defined herein rather than a traditional type-specific encoding.

      An unsigned decimal integer specifying the RDATA length in octets.

      Zero or more words of hexadecimal data encoding the actual RDATA
---
   The RDATA section of an RR of unknown type is represented as a
   sequence of white space separated words as follows:

|  *  The special token \# (a backslash immediately followed by a hash
      sign), which identifies the RDATA as having the generic encoding
      defined herein rather than a traditional type-specific encoding.

|  *  An unsigned decimal integer specifying the RDATA length in octets.

|  *  Zero or more words of hexadecimal data encoding the actual RDATA
      field, each containing an even number of hexadecimal digits.
|
|  The line-folding rules of Section 5.1 of [RFC1035] apply (they allow
|  the use of parentheses as special-purpose "white space" in order to
|  admit embedded end-of-lines in the RDATA representation).  Similarly,
|  end-of-line comments (starting with a semicolon and extending to the
|  end of a line) are allowed per Section 5.1 of [RFC1035].


(3)  Change Summary

We are going to obsolete RFC 3597 and heading for DS with this draft.
IESG rules thus require describing the differences of the memo from
its predecessor in some part of the document that is not doomed to be
stripped off by the RFC Editor.

Therefore, it might be wise to add a section (or Appendix)
"Changes Since RFC 3597" that gives a condensed summary of
the current Appendix A.

To save space and work, such section might start with:

  "Important differences from RFC 3597 have been highlighted in the
   preceding sections.  Further changes include:  ..."


(4)  Nit
                                      v
In the Abstract:  s/should not requires/should not require/


Kind regards,
  Alfred HÎnes.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



From owner-namedroppers@ops.ietf.org  Wed Jan 27 08:30:49 2010
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To: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [dnsext] draft-hoffman-dnssec-ecdsa-01
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At 1:30 PM +0100 1/27/10, Alfred =?hp-roman8?B?SM5uZXM=?= wrote:
>I have a few technical points to be discussed for the DNSSEC
>EDCDA draft, draft-hoffman-dnssec-ecdsa-01.
>
>
>(1)  bit string vs. octet strings
>
>Cryptographers are used to think in bit strings of arbitrary
>bit size.  DNS folks usually deal with octet strings.
>
>Since the introduction of bit strings does not incur any visible
>benefit here, I suggest to avoid the notion of bit strings entirely
>throughout the draft and use octet string oriented language and
>octet string sizes for field descriptions.

I figured that keeping the cryptographers happy while not hurting the DNS folks was a good idea. I'm happy to change, however.

>(2)  representation of EC keys
>
>Section 3 of the draft says (in its first paragraph):
>
>|  ECDSA public keys consist of a single value, called "Q" in FIPS
>|  186-3.  In DNSSEC keys, Q is a simple bit string that represents
>|  the uncompressed form of a curve point.
>
>This is by far underspecified for the intended audience of this memo.
>
>Section 2.3.3 of the SEC-1 Standard specifies the precise algorithm
>to convert an EC point to a 'normalized' octet string.
>This algorithm is widely adopted (IEEE, ANSI, NIST, IETF PKIX, etc.).
>Making explicit reference to the resulting data format should
>provide benefits for re-using existing crypto-APIs as well.
>
>I recommend to normatively quote this specification in a similar
>way as it is done in various new RFCs, including this week's
>RFC 575? series.

That sounds good.

>Further, the restriction to uncompressed form seems unnecessary,
>or even detrimental to the intended benefit of savings in DNS
>response packet size as well as consumed bandwidth and delay.
>The use of the compressed form essentially would cut down the
>EC key size to half the size of the uncompressed form.

Some IPR claims have been made on the compressed form, and none on the uncompressed form. I chose to avoid that problem.

>The draft text also is silent about the 'quality' requirements.
>SEC-1 and various NIST publications contain verification procedures
>and requirements for key generators, signers, and verifiers.
>Such requirements are already imported in recent IETF documents,
>cf. the abovementioned RFC 575? series.
>I suggest that the draft be amended by related normative text,
>after discussion of the assurance level the WG deems needed for
>this application of ECC.

The current DNSSEC documents do not reference the NIST material on provable and probable primes in the discussion of RSA. The material you suggest is parallel. I'm happy to add it, but it will likely cause people to think that ECC is harder than RSA.

>(3)  Precision if data element/field specification
>
>Given the intended audience of the draft, the size of the data
>elements used in the specification should be made explicit.
>
>I suggest to introduce a parameter 'm' (this is 'mlen' in SEC-1)
>into the table in Section 3 and make systematical use of it in
>Section 4.

Given how few people understand NIST's m values, I think this will lead to more confusion for no benefit.


--Paul Hoffman, Director
--VPN Consortium


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At 12:07 PM +0100 1/27/10, Alfred =?hp-roman8?B?SM5uZXM=?= wrote:
>Revisiting more closely the newly updated I-D,
>    draft-ietf-dnsext-dnssec-alg-allocation-02
>and the current state of the DNSSEC IANA registry,
>I found a few non-(meta-)technical issues overlooked
>in the past, where discussion focussed on the intended
>policy change and its description.
>
>In order to avoid delays later in the process, it might be
>desirable to address the details given below in item (1)
>and (2) now; item (3) recommends supplementary cleanup
>operations for the IANA registry, based on item (2).
>
>(1)  Copyright Notice
>
>The current draft uses the pre-RFC5378 IPR clause.
>That will certainly be challenged by the RFC Editor (which is
>obliged to do so).  Since I see no reason to use that clause
>(the entire draft is new), I suggest to drop the last paragraph
>of the Copyright Notice now, in order to ensure a more smooth
>progressing on the document later in the process.

I am leaving this as-is until after IESG evaluation because the headers and boilerplates keep changing. For the RFC, I'm happy to use whatever is current then.

>(2)  Front matter, Normative Downrefs, etc.
>
>The draft lists [RFC2535] and [RFC3755] as Normative Refs.
>Both RFCs have been obsoleted by RFC 4033..4035.
>
>Therefore, neither RFC 2535 nor RFC 3755 need to be formally
>"Updated" by the draft -- they already are "Obsoleted".

That is irrelevant: you can update an obsoleted RFC if need be. In this case, those two RFCs are still listed in the IANA registry.

>Also, the Introduction of the draft could be understood
>as if RFC 2535 (and maybe RFC 3755) still were the 'home'
>of the IANA "DNS Security Algorithm Numbers" registry.

That's how IANA lists them, yes.

>However, notwithstanding the wishy-washy IANA Considerations
>(plus Appendix A) of RFC 4034, this registry has essentially
>been re-parented to RFC 4034 by IANA.

You may find it wishy-washy; I don't want this draft blocked by such discussion.

>The only place where the draft makes reference to [RFC2535] and
>[RFC3755] is the Introduction.  This also indicates that these
>references should be listed as Informative.

As long as they are normative in the IANA registry that is being updated, the are normative.

>Furthermore, the text in the Introduction should be wordsmithed
>a bit to better reflect the temporal relationship and the
>current 'ownership' of the registry

If others agree during IETF Last Call that this is worthwhile, I'm happy to do so. Otherwise, I prefer to have the document move forwards as the WG agreed.


--Paul Hoffman, Director
--VPN Consortium


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From: Alfred =?hp-roman8?B?SM5uZXM=?= <ah@TR-Sys.de>
Message-Id: <201001271731.SAA08531@TR-Sys.de>
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-alg-allocation-02 downrefs
To: paul.hoffman@vpnc.org
Date: Wed, 27 Jan 2010 18:31:06 +0100 (MEZ)
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In-Reply-To: <p06240830c786151c0ede@[10.20.30.158]> from Paul Hoffman at Jan "27," 2010 "08:13:34" am
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Paul,
thanks for your quick respons.


Paul Hoffman wrote:

> At 12:07 PM +0100 1/27/10, Alfred HÎnes wrote:
>> Revisiting more closely the newly updated I-D,
>>     draft-ietf-dnsext-dnssec-alg-allocation-02
>> and the current state of the DNSSEC IANA registry,
>> I found a few non-(meta-)technical issues overlooked
>> in the past, where discussion focussed on the intended
>> policy change and its description.
>>
>> In order to avoid delays later in the process, it might be
>> desirable to address the details given below in item (1)
>> and (2) now; item (3) recommends supplementary cleanup
>> operations for the IANA registry, based on item (2).
>>
>> (1)  Copyright Notice
>>
>> The current draft uses the pre-RFC5378 IPR clause.
>> That will certainly be challenged by the RFC Editor (which is
>> obliged to do so).  Since I see no reason to use that clause
>> (the entire draft is new), I suggest to drop the last paragraph
>> of the Copyright Notice now, in order to ensure a more smooth
>> progressing on the document later in the process.
>
> I am leaving this as-is until after IESG evaluation because the
> headers and boilerplates keep changing. For the RFC, I'm happy
> to use whatever is current then.

I thought it'd be only a matter of a PI parameter in the xml
(ipr="full5378", currently)   :-)
I also already have seen anecdotal evidence of the IESG challenging
the pre-5378 clause, but I do not insist on this change now!


>> (2)  Front matter, Normative Downrefs, etc.
>>
>> The draft lists [RFC2535] and [RFC3755] as Normative Refs.
>> Both RFCs have been obsoleted by RFC 4033..4035.
>>
>> Therefore, neither RFC 2535 nor RFC 3755 need to be formally
>> "Updated" by the draft -- they already are "Obsoleted".
>
> That is irrelevant: you can update an obsoleted RFC if need be.

So is there 'need' ?
Does anybody still need the bulk of RFC 2535 ?
The only potentially interesting thing in RFC 2535 is SIG(0),
but that's out of scope of this draft.
My personal preference always has been to avoid potential
confusion and to not draw people's attention to obsoleted
documents they better should not read and implement now.

> In this case, those two RFCs are still listed in the IANA registry.
>
>> Also, the Introduction of the draft could be understood
>> as if RFC 2535 (and maybe RFC 3755) still were the 'home'
>> of the IANA "DNS Security Algorithm Numbers" registry.
>
> That's how IANA lists them, yes.

AFAICS, RFC 2535 is no more listed as the "owner" of the registry,
since quite a while.  As I had pointed out, it is still listed as a
ref. for algorithm numbers 253 and 254 (only).

>
>> However, notwithstanding the wishy-washy IANA Considerations
>> (plus Appendix A) of RFC 4034, this registry has essentially
>> been re-parented to RFC 4034 by IANA.
>
> You may find it wishy-washy;

You might prefer "unusual".  Never mind!

Explanation:
  The RFC 4034 IANA Considerations essentially describe the state
  of the registry _before_ the publication of that RFC.
  The requested changes are not made very explicit, but essentially
  all covered, by Appendix A.
  That does not correspond to the RFC 5226 expectations (I purposely
  avoid "requirements"), and those of its predecessor in force at the
  time of publication of the DNSSECbis documents.


> I don't want this draft blocked by such discussion.

I don't want to see it blocked either.
But I don't see any need or reason for such discussion.  As stated
once more above, IANA already lists RFC 4034 as a parent of the
registry.  My remark was a statement of fact, not a change request.


>> The only place where the draft makes reference to [RFC2535] and
>> [RFC3755] is the Introduction.  This also indicates that these
>> references should be listed as Informative.
>
> As long as they are normative in the IANA registry that is being
> updated, the are normative.

So at least RFC 2535 isn't any more.  :-)

IMHO, there's no need to "implement or understand" RFC 2535 and
RFC 3755 in order to "implement" this document.  RFC 4034 suffices.
So the water mark for Normative is clearly missed.

I have been tought by one AD recently that "normative in an IANA
registry" is no reason to treat the ref. as normative for a document
that changes the policy of suche registry or adds such registry
entries.  However, opinions vary, admittedly.

Maybe the IESG can (and most likely, will) contribute DISCUSSes
to this topic.   :-(

>
>> Furthermore, the text in the Introduction should be wordsmithed
>> a bit to better reflect the temporal relationship and the
>> current 'ownership' of the registry
>
> If others agree during IETF Last Call that this is worthwhile,
> I'm happy to do so. Otherwise, I prefer to have the document
> move forwards as the WG agreed.

I do not oppose to move on now and consider these changes later,
e.g. after IETF LC, or when the IESG comes up with similar ideas.

My basic idea was that doing that _now_ might make the overall
process more straight and smooth, and faster.

Thus, I leave it to the WG and the chairs to decide which way
is more likely to save efforts in the longer term.


>
> --Paul Hoffman, Director
> --VPN Consortium

Kind regards,
  Alfred.



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From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [dnsext] draft-ietf-dnsext-dnssec-alg-allocation-02 downrefs
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At 6:31 PM +0100 1/27/10, Alfred =?hp-roman8?B?SM5uZXM=?= wrote:
> > I am leaving this as-is until after IESG evaluation because the
>> headers and boilerplates keep changing. For the RFC, I'm happy
>> to use whatever is current then.
>
>I thought it'd be only a matter of a PI parameter in the xml
>(ipr="full5378", currently)   :-)
>I also already have seen anecdotal evidence of the IESG challenging
>the pre-5378 clause, but I do not insist on this change now!

So, if you know that the current tools don't support this change, why are you asking for it in this WG?

> >> (2)  Front matter, Normative Downrefs, etc.
>>>
>>> The draft lists [RFC2535] and [RFC3755] as Normative Refs.
>>> Both RFCs have been obsoleted by RFC 4033..4035.
>>>
>>> Therefore, neither RFC 2535 nor RFC 3755 need to be formally
>>> "Updated" by the draft -- they already are "Obsoleted".
>>
>> That is irrelevant: you can update an obsoleted RFC if need be.
>
>So is there 'need' ?

No, but it is accurate to do so.

>Does anybody still need the bulk of RFC 2535 ?
>The only potentially interesting thing in RFC 2535 is SIG(0),
>but that's out of scope of this draft.
>My personal preference always has been to avoid potential
>confusion and to not draw people's attention to obsoleted
>documents they better should not read and implement now.

That makes sense, but so does updating documents whose policies are being changed.

> > In this case, those two RFCs are still listed in the IANA registry.
>>
>>> Also, the Introduction of the draft could be understood
>>> as if RFC 2535 (and maybe RFC 3755) still were the 'home'
>>> of the IANA "DNS Security Algorithm Numbers" registry.
>>
>> That's how IANA lists them, yes.
>
>AFAICS, RFC 2535 is no more listed as the "owner" of the registry,
>since quite a while.  As I had pointed out, it is still listed as a
>ref. for algorithm numbers 253 and 254 (only).

And understanding those two are *very important* to this document.

> > I don't want this draft blocked by such discussion.
>
>I don't want to see it blocked either.
>But I don't see any need or reason for such discussion.  As stated
>once more above, IANA already lists RFC 4034 as a parent of the
>registry.  My remark was a statement of fact, not a change request.

My apologies: it sounded like a change request.

>IMHO, there's no need to "implement or understand" RFC 2535 and
>RFC 3755 in order to "implement" this document.  RFC 4034 suffices.
>So the water mark for Normative is clearly missed.

That's one watermark. Another is that if a document is being updated, it is normative.

>I have been tought by one AD recently that "normative in an IANA
>registry" is no reason to treat the ref. as normative for a document
>that changes the policy of suche registry or adds such registry
>entries.  However, opinions vary, admittedly.

Yes.

>Maybe the IESG can (and most likely, will) contribute DISCUSSes
>to this topic.   :-(

No.

>I do not oppose to move on now and consider these changes later,
>e.g. after IETF LC, or when the IESG comes up with similar ideas.

During IETF LC is fine, and it lets the IESG weigh in on some of the assumptions you make.

--Paul Hoffman, Director
--VPN Consortium


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--===============0288051047==
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From owner-namedroppers@ops.ietf.org  Wed Jan 27 16:06:02 2010
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Subject: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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Hello everyone,

I spoke to Olafur about this idea in Hiroshima last year. I'm afraid
the deadline for Anaheim already passed, but we hope we can discuss it
on-line in the meantime and decide if it should become a WG item in
Maastricht later this year.

To summarize the I-D: It specifies an EDNS0 option that carries IP
address information (by default only the first 24 bits to preserve
privacy) of the user that triggered a DNS resolution. This should
allow authoritative nameservers that give geo-targeted responses to be
more accurate, even in cases where the resolver and its users aren't
close to each other. To preserve the ability to cache such responses
efficiently, the option in the response can indicate which exact
subnet it should be cached for.

Comments are more than welcome.


Regards,

Wilmer van der Gaast
Carlo Contavalli
Google

Sean Leach
Darryl Rodden
Neustar/UltraDNS


>From i-d-announce:
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
>
> 	Title		: Client IP information in DNS requests
> 	Author(s)	: C. Contavalli, W. van der Gaast, S. Leach, D. Rodden
> 	Filename	: draft-vandergaast-edns-client-ip-00.txt
> 	Pages		: 20
> 	Date		: 2010-1-26
> 	
>    This draft defines an EDNS0 extension to allow Authoritative
>    Nameservers to return varying replies based upon the network address
>    of the client that initiated the query rather than of the client's
>    Recursive Resolver.
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-vandergaast-edns-client-ip-00.txt


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Date: Thu, 28 Jan 2010 00:59:47 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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On Wed, Jan 27, 2010 at 11:56 PM, Wilmer van der Gaast
<wilmer@google.com> wrote:
> I spoke to Olafur about this idea in Hiroshima last year. I'm afraid
> the deadline for Anaheim already passed, but we hope we can discuss it
> on-line in the meantime and decide if it should become a WG item in
> Maastricht later this year.

+1 - As someone with an interest in writing an implementation, it
would be great to know at what stage an EDNS option code may be
assigned, if appropriate.

> Comments are more than welcome.

Section 1; Instead of "most nameservers" maybe "most such nameservers" ?
                "at best sub-optimal" -> "sub-optimal" but it's just a nit.

Section 2; The term "VLSM" (variable lengh subnet mask) may be more
technically correct than the use of the term "CIDR" - though I don't
think it matters much, the meaning is clear.

Section 4.1; The question naturally arises as to what happens when
there is a mismatch between the address-family used for the DNS query,
and the eventual address family of the client request. However as
these addresses may be considered to be located in similar topologies,
I don't think this is a hindrance and endorse the simplicty chosen in
the I-D.

On the subject of security;

"   A Recursive Resolver set up to serve clients in private address space
  (as defined in [RFC1918] and [RFC4193]) MUST NOT add edns-client-ip
  options containing a non-public address to its queries.  An edns-
  client-ip option MUST never contain a non-public address."

I think more general advice may be useful, rather than wording it as
"non-public" maybe come at it the other way and say;

 "A Recursive Resolver SHOULD add edns-client-ip options corresponding to
  publically routeable IP addresses only".

additionally, for better caching efficiency, it may be worth adding
text along the lines of;

 "Where the operators of a recursive resolver are aware of a client's
network routing policy, adopters are encouraged to ensure that a
NETMASK value corresponding to the largest network subject to a common
internet routing policy
should be used".

In other words, if it's a large ISP, and they know that an entire /20
is routed identically, then advertising the /20 makes the most sense
and results in more cache hits. This would pressure auth servers to
correctly aggregate their datasets, rather than the back-and-forth
negotiation of NETMASK which the I-D permits, but I think this might
be a positive thing :)

Sections 4.1/4.2:

 I think more detail is needed on how the system works when the
netmask returned is higher.  For example;

   client 192.0.2.53 makes query
   resolver sets option as 192.0.0.0/16
   auth server responds with 192.0.0.0/24

what should the resolver do in this case? 192.0.0.0/24 doesn't
correspond to a network 192.0.2.53 is in, but should it use the answer
anyway? What goes in the cache? The I-D says;

" A Recursive Resolver MUST return this entry from cache only to
queries that do not allow a higher NETMASK to be forwarded."

but does that mean this response should be cached for 192.0.2.53 too,
if it doesn't allow a higher netmask to be forwarded.

Section 8;

I would be more stern about one thing;

   "Authoritative nameservers MUST NOT use the contents of the
edns-clientip option as a means of access-control."

experience from HTTP and X-Forwarded-For has shown that people will do this :)

>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>>
>>
>>       Title           : Client IP information in DNS requests
>>       Author(s)       : C. Contavalli, W. van der Gaast, S. Leach, D. Rodden
>>       Filename        : draft-vandergaast-edns-client-ip-00.txt
>>       Pages           : 20
>>       Date            : 2010-1-26
>>
>>    This draft defines an EDNS0 extension to allow Authoritative
>>    Nameservers to return varying replies based upon the network address
>>    of the client that initiated the query rather than of the client's
>>    Recursive Resolver.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-vandergaast-edns-client-ip-00.txt
>
>

--
Colm


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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
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if we're going to add client identity to the query, can we do so in a more
general way?  i'd like to know lat-long, country, isp, language, and
adult/child.  and the ip address should be multiprotocol, covering ipv6.


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On Thu, 28 Jan 2010, Paul Vixie wrote:

> if we're going to add client identity to the query, can we do so in a more
> general way?  i'd like to know lat-long, country, isp, language, and
> adult/child.  and the ip address should be multiprotocol, covering ipv6.

And implementation name and version number?

Tony.
-- 
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GERMAN BIGHT HUMBER: SOUTHWEST 5 TO 7. MODERATE OR ROUGH. SQUALLY SHOWERS.
MODERATE OR GOOD.


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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
In-Reply-To: Your message of "Thu\, 28 Jan 2010 16\:07\:05 GMT." <4966825a1001280807i768a33ccs98f809366bce33d8@mail.gmail.com> 
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> From: Carlo Contavalli <ccontavalli@google.com>
> Date: Thu, 28 Jan 2010 16:07:05 +0000
>=20
> On Thu, Jan 28, 2010 at 5:46 AM, Paul Vixie <vixie@isc.org> wrote:
> > if we're going to add client identity to the query, can we do so in a m=
ore
> > general way? =A0i'd like to know lat-long, country, isp, language, and
> > adult/child. =A0and the ip address should be multiprotocol, covering
> > ipv6.

> The doc does cover ipv6, and allows for other protocols to be supported,
> if necessary.

great.

> Rather than adding client identity, what we're trying to do is address
> a concrete problem that affects CDNs, open resolvers, and many large
> sites, that for whatever reason, use the source ip of the query to
> determine which reply to return to the user.

i don't think that's a general enough solution to be worth standardizing.
please investigate the larger context of client identity, beyond the needs
of CDN's.


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From: Carlo Contavalli <ccontavalli@google.com>
Date: Thu, 28 Jan 2010 16:07:05 +0000
Message-ID: <4966825a1001280807i768a33ccs98f809366bce33d8@mail.gmail.com>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
To: Paul Vixie <vixie@isc.org>
Cc: Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
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On Thu, Jan 28, 2010 at 5:46 AM, Paul Vixie <vixie@isc.org> wrote:
> if we're going to add client identity to the query, can we do so in a mor=
e
> general way? =A0i'd like to know lat-long, country, isp, language, and
> adult/child. =A0and the ip address should be multiprotocol, covering ipv6=
.
The doc does cover ipv6, and allows for other protocols to be
supported, if necessary.

Rather than adding client identity, what we're trying to do is address
a concrete problem that affects CDNs, open resolvers, and many large
sites, that for whatever reason, use the source ip of the query to
determine which reply to return to the user.

Carlo


From owner-namedroppers@ops.ietf.org  Thu Jan 28 08:31:37 2010
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Jan 28, 2010, at 9:13 AM, Paul Vixie wrote:

>> From: Carlo Contavalli <ccontavalli@google.com>
>> Date: Thu, 28 Jan 2010 16:07:05 +0000
>>=20
>> On Thu, Jan 28, 2010 at 5:46 AM, Paul Vixie <vixie@isc.org> wrote:
>>> if we're going to add client identity to the query, can we do so in =
a more
>>> general way?  i'd like to know lat-long, country, isp, language, and
>>> adult/child.  and the ip address should be multiprotocol, covering
>>> ipv6.
>=20
>> The doc does cover ipv6, and allows for other protocols to be =
supported,
>> if necessary.
>=20
> great.
>=20
>> Rather than adding client identity, what we're trying to do is =
address
>> a concrete problem that affects CDNs, open resolvers, and many large
>> sites, that for whatever reason, use the source ip of the query to
>> determine which reply to return to the user.
>=20
> i don't think that's a general enough solution to be worth =
standardizing.
> please investigate the larger context of client identity, beyond the =
needs
> of CDN's.
>=20


I have to agree with and Carlo/Wilmer here (no surprise) that we should =
keep this focused as this is a real (and growing) problem that we =
(UltraDNS) face all the time as well.  Both from our anycast recursive =
service and for our auth DNS customers whose end users utilize OpenDNS, =
Google DNS etc.  There are more and more anycast recursive systems =
popping up daily it seems, so the problem is only going to get worse.

Adding identity etc. feels like a different problem that doesn't need to =
be solved with this standard.  Just my .02=


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Date: Thu, 28 Jan 2010 08:41:17 -0800
To: Paul Vixie <vixie@isc.org>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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At 4:13 PM +0000 1/28/10, Paul Vixie wrote:
> > From: Carlo Contavalli <ccontavalli@google.com>
>> Date: Thu, 28 Jan 2010 16:07:05 +0000
>>
>> On Thu, Jan 28, 2010 at 5:46 AM, Paul Vixie <vixie@isc.org> wrote:
>> > if we're going to add client identity to the query, can we do so in a more
>> > general way?  i'd like to know lat-long, country, isp, language, and
>> > adult/child.  and the ip address should be multiprotocol, covering
>> > ipv6.
>
>> The doc does cover ipv6, and allows for other protocols to be supported,
>> if necessary.
>
>great.
>
>> Rather than adding client identity, what we're trying to do is address
>> a concrete problem that affects CDNs, open resolvers, and many large
>> sites, that for whatever reason, use the source ip of the query to
>> determine which reply to return to the user.
>
>i don't think that's a general enough solution to be worth standardizing.
>please investigate the larger context of client identity, beyond the needs
>of CDN's.

OK, I'll bite. I thought your first message was you using your dry humor voice; now it seems like you really meant it.

What technical problem would identifying the lat-long of the requester solve? I'm not asking "is there someone who would want to collect this information for later marketing purposes"; I'm asking what technical problem would knowing that information solve.

Ditto for the other things you listed, of course, but they seemed less likely (to me) to have an answer to the question.

--Paul Hoffman, Director
--VPN Consortium


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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
Date: Thu, 28 Jan 2010 08:54:57 -0800
To: Paul Vixie <vixie@isc.org>
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On Jan 28, 2010, at 8:13 AM, Paul Vixie wrote:
>> Rather than adding client identity, what we're trying to do is =
address
>> a concrete problem that affects CDNs, open resolvers, and many large
>> sites, that for whatever reason, use the source ip of the query to
>> determine which reply to return to the user.
>=20
> i don't think that's a general enough solution to be worth =
standardizing.
> please investigate the larger context of client identity, beyond the =
needs
> of CDN's.

ANY system which desires that a request be routed to the "best" instance =
which is appropriate to handle the request, without the need to =
introduce divergent names (which impacts user experience), detailed =
protocol changes to HTTP and a host of other protocols, front-end =
redirection, or IP routing (multipathing), would greatly benefit from =
knowing the requesting client's IP address in the name lookup, and can =
ONLY route=20

That may "only" be CDN, but CDN or CDN-like tricks are VERY important on =
the current Internet, and without the ability for CDN's to produce =
meaningful values, this limits the ability of third-party DNS resolver =
providers to do any good: one of the common complaints about OpenDNS is =
it "makes YouTube slow".




However, on this draft I'd recommend that resolvers implementing this =
should do a fallback model:


When initially querying any new authority, the resolver is advised that =
it should conduct both a query with this EDNS0 extension and, if no =
result is seen in a shortened timeout (1s) a second one without, using =
different transaction IDs and port numbers, and use a TRW-style count of =
success/failure to determine whether the authority accepts such records =
or not. =20

If there are more than T such failures for an authority, it should be =
noted as not supporting this EDNS0 extension in a broken manner (causing =
failure), and this extension should not be used in subsequent =
communications with this authority.

Thus authorities which react badly to unknown EDNS0 extensions will =
still be reachable, and after only a few short timeouts, not experience =
any worse resolution latency.




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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 09:00:12 -0800
To: Paul Hoffman <paul.hoffman@vpnc.org>
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On Jan 28, 2010, at 8:41 AM, Paul Hoffman wrote:
> OK, I'll bite. I thought your first message was you using your dry =
humor voice; now it seems like you really meant it.
>=20
> What technical problem would identifying the lat-long of the requester =
solve? I'm not asking "is there someone who would want to collect this =
information for later marketing purposes"; I'm asking what technical =
problem would knowing that information solve.

It would be really nice for (ab)using DNS as an exact match database:

dig TXT food.whereami.com -> records of the nearby resteraunts.

Only slightly tounge-in-cheek.



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From: Paul Vixie <vixie@isc.org>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
In-Reply-To: Your message of "Thu, 28 Jan 2010 09:25:59 MST." <50A91B20-5AC1-4819-91ED-E5141F068D48@wiggum.com> 
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> From: Sean Leach <sleach@wiggum.com>
> Date: Thu, 28 Jan 2010 09:25:59 -0700
> 
> On Jan 28, 2010, at 9:13 AM, Paul Vixie wrote:
> > 
> > i don't think that's a general enough solution to be worth
> > standardizing.  please investigate the larger context of client
> > identity, beyond the needs of CDN's.
> 
> I have to agree with and Carlo/Wilmer here (no surprise) that we should
> keep this focused as this is a real (and growing) problem that we
> (UltraDNS) face all the time as well.  Both from our anycast recursive
> service and for our auth DNS customers whose end users utilize OpenDNS,
> Google DNS etc.  There are more and more anycast recursive systems
> popping up daily it seems, so the problem is only going to get worse.
> 
> Adding identity etc. feels like a different problem that doesn't need to
> be solved with this standard.  Just my .02

if we're going to add something to a global protocol and a global system,
we have a burden to do good engineering, not just offer point solutions
that help a single industry.  there's a reason why web browsers can state
their preferred language, which is customized content.  if we're going to
customize dns responses at all (which is controversial) then we have to
allow for the possibility that some dns content producers will want to
customize based on things beyond just client ip.

(also, many client-ip addresses will be nat'd, and in that sense, ip is no
longer end to end, and so including a client-ip in the query is a layering
violation beyond just its fealty to dns incoherency.)


From owner-namedroppers@ops.ietf.org  Thu Jan 28 10:19:44 2010
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From: Alex Bligh <alex@alex.org.uk>
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To: Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org
cc: Alex Bligh <alex@alex.org.uk>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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I have read the draft.

Re Paul's comment:

--On 28 January 2010 17:18:07 +0000 Paul Vixie <vixie@isc.org> wrote:

> (also, many client-ip addresses will be nat'd, and in that sense, ip is no
> longer end to end, and so including a client-ip in the query is a layering
> violation beyond just its fealty to dns incoherency.)

I had thought your "also" would be the main justification. With carrier
grade NAT and so forth appearing as v4 address exhaust, it's going to
become less and less reliable to map IP address to a specific geography,
and more and more likely a client IP address is "192.168.0.2"
(where both recursive resolver and client are behind the same NAT,
e.g. office LAN with NAT), in which case per the draft you get
nothing (as opposed to a GPS coordinate).

I'm nervous about overloading transport identifiers as a source of
geographic information in the first place, particularly it's yet
another thing middleboxes will decide, rightly or wrongly, they
need to fiddle with. Not allowing something which is a better indicator
of geography (e.g. GPS coordinate) seems to compound the problem.


More generally:

* I am concerned that the IP included is the transport layer IP
  visible to the client/resolver. That might have little to do
  with the IP address from which a subsequent (e.g.) http connection
  appears to originate.

* I am concerned that even if you put in (e.g.) GPS, that gives
  you geographic proximity data, which may not correlate well
  to best match in terms of network topology.

* I am concerned the privacy provision is neither sufficient
  nor harmless. It may be insufficient as even at a /24 level
  it is possible to identify a large organisations outbound
  NAPT external IP range. It may not be harmless as two /25s
  may be in different geographies. Given people make DNS
  queries in general so they can communicate with the (e.g.)
  A record given, and the (e.g.) http server on that IP address
  can log connections, what privacy is lost by transmitting
  the address given in full? Wouldn't it be simpler to say
  that the querying client MAY (if it wishes) include a net mask
  showing which bits are accurate, and bits outside that
  mask are to be ignored and are undefined? That way, if a
  client wants to give incomplete information, it may. You
  leave this choice to the recursive resolver, I think, not
  the client, and require that at least some bits are cleared.

* I am concerned about section 4.3 causing algorithmic
  complexity, and an explosion in cache size. If NETMASK
  is set small, you will get a ton of records for
  www.google.com cached. That's going to be unworkable,
  which will encourage large settings for NETMASK.

I have to wonder whether the simpler solution to fix this is
not just to deploy more resolvers closer to the edge.


-- 
Alex Bligh


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> Restricting the technique to Client IP seems very reasonable, mainly
> because it's the most prevalent such factor today. But also because
> the aim here should be to improve DNS as a naming mechanism for the
> internet, not to make it arbitrary client-identification mechanism.
> That doesn't seem like poor engineering.

it does if many clients are behind NAT.

it does if there are other factors that other industries outside CDN would
use to manage their incoherency.

it's not worth a global upgrade to DNS in its current form.

it may be too dangerous in any form but that's a separate issue.


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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
To: Paul Vixie <vixie@isc.org>
Cc: namedroppers@ops.ietf.org
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On Thu, Jan 28, 2010 at 5:18 PM, Paul Vixie <vixie@isc.org> wrote:
> if we're going to add something to a global protocol and a global system,
> we have a burden to do good engineering, not just offer point solutions
> that help a single industry. =A0there's a reason why web browsers can sta=
te
> their preferred language, which is customized content. =A0if we're going =
to
> customize dns responses at all (which is controversial) then we have to
> allow for the possibility that some dns content producers will want to
> customize based on things beyond just client ip.

Customising responses is already a de-facto part of shared internet
infrastructure. It seems like a standard that mitigates the
sub-optimalities of this approach and improves service for users and
providers alike is desireable. The alternative is non-interoperable
and behind-the-scenes ad-hoc mechanisms.

Restricting the technique to Client IP seems very reasonable, mainly
because it's the most prevalent such factor today. But also because
the aim here should be to improve DNS as a naming mechanism for the
internet, not to make it arbitrary client-identification mechanism.
That doesn't seem like poor engineering.

> (also, many client-ip addresses will be nat'd, and in that sense, ip is n=
o
> longer end to end, and so including a client-ip in the query is a layerin=
g
> violation beyond just its fealty to dns incoherency.)

I think the draft takes explicit account of this issue.

--=20
Colm


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Date: Thu, 28 Jan 2010 18:53:53 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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2010/1/28 Paul Vixie <vixie@isc.org>:
>> Restricting the technique to Client IP seems very reasonable, mainly
>> because it's the most prevalent such factor today. But also because
>> the aim here should be to improve DNS as a naming mechanism for the
>> internet, not to make it arbitrary client-identification mechanism.
>> That doesn't seem like poor engineering.
>
> it does if many clients are behind NAT.

 If many clients are behind NAT then a resolver operator may ensure
that the NAT IP is forwarded in the option. It doesn't seem like a big
problem.

> it does if there are other factors that other industries outside CDN would
> use to manage their incoherency.

I can see the case for LOC forwarding ... some do forward answers
based on GeoIP lookups (it's a common PowerDNS configuration for
example). But it seems like directing clients to internet nodes based
on non-internet-routing criteria is itself poor engineering.

> it's not worth a global upgrade to DNS in its current form.

I don't think a global upgrade is being proposed. More likely; a
relatively small number of large resolver operators, and interested
authoritative DNS destinations (e.g. CDNs) would utilise the option.
In many cases, such operators may already be using non-standardised
mechanisms to achieve the same effect. I think it's better for the
internet that there be a published, interoperable, solution which is
well engineered for efficiency, efficacy and privacy. It would be
disappointing were this not within the remit of a task force charged
with engineering the internet.

-- 
Colm


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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
Date: Thu, 28 Jan 2010 11:02:50 -0800
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On Jan 28, 2010, at 10:42 AM, Paul Vixie wrote:

>> Restricting the technique to Client IP seems very reasonable, mainly
>> because it's the most prevalent such factor today. But also because
>> the aim here should be to improve DNS as a naming mechanism for the
>> internet, not to make it arbitrary client-identification mechanism.
>> That doesn't seem like poor engineering.
>=20
> it does if many clients are behind NAT.

No it doesn't, because the global NAT'ed IP address is still the network =
closeness metric that is probably most desirable.

EG, even if Comcast put everyone in Napa behind a single NAT'ed IP =
address, that external IP address is a VERY good locator for things like =
Akamai, Youtube, etc etc etc etc.

> it does if there are other factors that other industries outside CDN =
would
> use to manage their incoherency.
>=20
> it's not worth a global upgrade to DNS in its current form.

It can be done WITHOUT a global upgrade: you can do it with JUST =
upgrades to the recursive resolvers and authorities desiring such =
behavior, see my note on fallbacks from the resolver point of view.

> it may be too dangerous in any form but that's a separate issue.

Because you can do it with only changes to recursive resolvers and =
authorities, with resolvers understanding where and how authorities =
might fail, you can mitigate these dangers.




From owner-namedroppers@ops.ietf.org  Thu Jan 28 11:15:49 2010
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: Ted Hardie <ted.ietf@gmail.com>
To: Wilmer van der Gaast <wilmer@google.com>
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Howdy,

The draft currently says:

   Authoritative Nameservers of most major web sites today return
   different replies based on the perceived vicinity of the user to a
   particular location and knowledge of available resources.  This
   significantly reduces the overall latency of connections established
   by the end user and optimizes network resource usage.

   To find the best reply for a given query, most nameservers use the IP
   address of the incoming query to attempt to establish the location of
   the end user.

This seems to mix two different motivations, based on two different
ideas about locality.  In the first, you want to provide data from the HTTP
server to the end user along the path with the lowest possibly latency,
so you want to do some lookup of the relationship between the client's
network location and the list of available servers' locations before providing
the DNS response.  The first 24 bits of the client's IP address are used
to determine this network location.

The second motivation is to return different content based on geographic
location and the likely implications for default language, character sets, and
so on.  For that motivation, you want to associate the client with a server
having that data as quickly as possible--without, for example, doing a
3xx redirect after reading the client's language preferences in their first
request.

I would be personally surprised to find that the first 24 bits of an IP address
of the client are actually better at the association needed for your
first motivation
than the full IP address of the querying resolver, but I've been
surprised before.
Minimally, you'd seem to me to need to do something to figure out what
an "external" value of an IP address for that host was when the
resolver populated
that field for hosts behind NATs.  If the client did not have one (yet), a
heuristic population of the first 24 bits of the field seems possible
but mighty
unlikely to be terribly accurate (beyond the accuracy of the querying resolver's
IP anyway).  If you're going to simply population it with the first 24
bits of the
NATted address, this seems to be of pretty low utility.

The second motivation actually takes you straight into GEOPRIV territory, and
it's not clear to me at all how a client would opt-in to revealing geolocation
in some DNS queries and not all, given how applications typically interact
with DNS libraries.  There's some serious fun on the privacy legal fronts
in front of you there, should you decide to take up the idea of actually having
the geolocation directly disclosed, rather than inferred.  If you
leave it inferred,
you still seem to me to have the NAT problem to noted above.

Can you clarify which motivation is driving this draft?

regards,

Ted Hardie


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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 11:13:29 -0800
To: Alex Bligh <alex@alex.org.uk>
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On Jan 28, 2010, at 10:10 AM, Alex Bligh wrote:

> I have read the draft.
>=20
> Re Paul's comment:
>=20
> --On 28 January 2010 17:18:07 +0000 Paul Vixie <vixie@isc.org> wrote:
>=20
>> (also, many client-ip addresses will be nat'd, and in that sense, ip =
is no
>> longer end to end, and so including a client-ip in the query is a =
layering
>> violation beyond just its fealty to dns incoherency.)
>=20
> I had thought your "also" would be the main justification. With =
carrier
> grade NAT and so forth appearing as v4 address exhaust, it's going to
> become less and less reliable to map IP address to a specific =
geography,
> and more and more likely a client IP address is "192.168.0.2"
> (where both recursive resolver and client are behind the same NAT,
> e.g. office LAN with NAT), in which case per the draft you get
> nothing (as opposed to a GPS coordinate).

Actually, I disagree.  The client still has an external IP address, =
which should be used if the resolver is outside the nat and, if inside =
the NAT, the resolver should provide either the external IP address (if =
known) or no information.

Even in the presence of carrier-grade NAT and both cases of resolver =
location, the external IP address is a very good approximation of =
"close" in NETWORK terms, which is what's really needed for CDNs and all =
this to work right.

I think of this proposal as "provide a strong indication of NETWORK =
location", which NATs would not interfere with.


> * I am concerned that the IP included is the transport layer IP
> visible to the client/resolver. That might have little to do
> with the IP address from which a subsequent (e.g.) http connection
> appears to originate.

Only VERY rarely.  Very few users in our observations with Netalyzr are =
behind manually or automatically configured proxies which route traffic =
through a different address from the remainder of their network traffic =
(<3%), with 1/4 of those having the proxy in the same /24 subnet.

And those who are privacy concious can route DNS requests through the =
same proxy or similar proxies, which you'd want to do anyway because it =
is network-closeness to the proxy that counts anyway.

> * I am concerned about section 4.3 causing algorithmic
> complexity, and an explosion in cache size. If NETMASK
> is set small, you will get a ton of records for
> www.google.com cached. That's going to be unworkable,
> which will encourage large settings for NETMASK.

Memory is cheap.  Seriously, who should worry when any resolver big =
enough to have this issue is going to be a cluster:  Lets say I have a =
open recursive resolver for EVERYONE, and 1000 names uses this and are =
queried by EVERYONE, and I have netmask set to /24.

The total caching space required is 16 Giga-entries.

> I have to wonder whether the simpler solution to fix this is
> not just to deploy more resolvers closer to the edge.

Actually, that IS the fix:  Use the ISP's recursive resolver.

This is necessary if you want to use something OTHER than the ISP's =
recursive resolver to work well on today's Internet.

Do you want third-party DNS providers to not suck for youtube, akamai, =
Google, and a good fraction of the net people use every day?  If so, you =
need this.



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Date: Thu, 28 Jan 2010 19:25:02 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: Wilmer van der Gaast <wilmer@google.com>
To: Ted Hardie <ted.ietf@gmail.com>
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Hello Ted,

2010/1/28 Ted Hardie <ted.ietf@gmail.com>:
> The second motivation is to return different content based on geographic
> location and the likely implications for default language, character sets=
, and
> so on. =A0For that motivation, you want to associate the client with a se=
rver
> having that data as quickly as possible--without, for example, doing a
> 3xx redirect after reading the client's language preferences in their fir=
st
> request.
>
Our motivation is purely to improve the ability of authoritative
nameservers to send users to a nearby server. Although indeed the IP
address of the recursive resolver is often enough to do this, we've
seen several cases where it isn't. Think of ISPs with big networks
without setting up nameservers everywhere, or of open resolvers.

> Minimally, you'd seem to me to need to do something to figure out what
> an "external" value of an IP address for that host was when the
> resolver populated
> that field for hosts behind NATs.

The I-D specifically disallows exactly that. Resolvers behind NAT
should not need this option at all if they do the recursion
themselves, since the authoritative nameservers will find enough
accuracy in the packet source IP addresses already.

Most people simply don't run their own recursive resolver though.


Regards,

--=20
Wilmer van der Gaast, Dublin Traffic SRE.
Google Ireland.


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From: Paul Vixie <vixie@isc.org>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
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> From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
> Date: Thu, 28 Jan 2010 11:13:29 -0800
> 
> > I have to wonder whether the simpler solution to fix this is
> > not just to deploy more resolvers closer to the edge.
> 
> Actually, that IS the fix:  Use the ISP's recursive resolver.
> 
> This is necessary if you want to use something OTHER than the ISP's
> recursive resolver to work well on today's Internet.

i love how somebody else (CDN providers) violate all existing assumptions
(by creating requestor-specific DNS replies) which then makes the Internet
work "less well" for lots of people... who are then constrained from doing
what were previously reasonable things (like using distant recursive servers).

> Do you want third-party DNS providers to not suck for youtube, akamai,
> Google, and a good fraction of the net people use every day?  If so, you
> need this.

if youtube and akamai and google want to suck, let them suck.  they weren't
the first movers and they won't be the last and redrawing the protocol to
support their flawed technical model is not in the global system's interest.

this incoherency should be dealt with more harshly, perhaps by minimizing
TTL to 5 minutes, and sharing a single DNS cache across global providers.

any CDN who relies on what i call "stupid DNS tricks" to deliver their
advantage should upgrade to something at the WWW layer, and leave DNS alone.

especially with DNSSEC coming.


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Date: Thu, 28 Jan 2010 11:55:00 -0800
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: Ted Hardie <ted.ietf@gmail.com>
To: Wilmer van der Gaast <wilmer@google.com>
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On Thu, Jan 28, 2010 at 11:25 AM, Wilmer van der Gaast
<wilmer@google.com> wrote:

>>
> Our motivation is purely to improve the ability of authoritative
> nameservers to send users to a nearby server. Although indeed the IP
> address of the recursive resolver is often enough to do this, we've
> seen several cases where it isn't. Think of ISPs with big networks
> without setting up nameservers everywhere, or of open resolvers.

On the first point, you're looking at the case where an ISP is deploying
nameservers such that there is a limited relationship between the
placement of the nameserver making a query to the CDN and the
placement of the original client; hierarchies of nameservers bubbling
up to a few at the top would do that as would some other deployments.
But why is a protocol hack the right answer here, rather than a NANOG
(RIPE/APRICOT/AFnog/et al)presentation that describes the
consequences and encourages the use of nameserver deployments
that match the need?  Presumably the ISPs want fast service from
CDNs and good access to GOOG so as to avoid customer complaints.
They don't even need new boxes here; source IP address selection in the queries
sent outbound can handle this as easily as a new field (yes, that means
routing addresses for addresses in multiple subnets back to the querying server,
but that's hardly rocket science).

Third party resolvers are a different case, and too many of them are being
used because of privacy concerns for me to be overly sanguine about
that use case.  I think you'd find their users opt-ing out of that if the choice
were made.  And that's the crux of the problem here--this is encouraging
a part of the infrastructure to pass an association about the query stream
to an upstream that they didn't before.  Sure, that can be used to provide
better service.  But it can be used for other things as well, and there seems
to be no mechanism provided to allow the client to signal its willingness or
unwillingness to have this invoked on its behalf; without that, I would be
somewhat reluctant to see it in the wild.

regards,

Ted Hardie


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From owner-namedroppers@ops.ietf.org  Thu Jan 28 12:00:57 2010
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Date: Thu, 28 Jan 2010 19:51:27 +0000
From: Alex Bligh <alex@alex.org.uk>
Reply-To: Alex Bligh <alex@alex.org.uk>
To: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org, Alex Bligh <alex@alex.org.uk>
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Nicholas,

>> * I am concerned that the IP included is the transport layer IP
>> visible to the client/resolver. That might have little to do
>> with the IP address from which a subsequent (e.g.) http connection
>> appears to originate.
>
> Only VERY rarely.  Very few users in our observations with Netalyzr are
> behind manually or automatically configured proxies which route traffic
> through a different address from the remainder of their network traffic
> (<3%), with 1/4 of those having the proxy in the same /24 subnet.

I am surprised if that is the case and wonder whether you are reading
my sentence in another way. So, e.g. take this set up

                                 192.168.0.2
            192.0.2.0/24       |------------ Resolver
  Internet <-----------[NAT]---|
                               |------------ Client
                                 192.100.0.3

Now, the client IP address in the DNS query is going to 192.100.0.3.
The resolver has no (reliable) way for finding out its external
IP address. It may heuristically determine it is 192.0.2.1 (say)
but that presumes that it doesn't have (e.g.) a forwarder configured.
However, the current draft says it should use 192.168.0.2, but
for the fact that is RFC1918 space, and it should thus discard
it. Best case, the subsequent http connection (or whatever) appears
to come from 192.0.2.0/24.

If you think my using NAT is cheating, then consider the example
of (say) the university with no NAT, but a squid proxy. What's
to say their internal resolvers are on the same /24 as the
squid proxy?

>> * I am concerned about section 4.3 causing algorithmic
>> complexity, and an explosion in cache size. If NETMASK
>> is set small, you will get a ton of records for
>> www.google.com cached. That's going to be unworkable,
>> which will encourage large settings for NETMASK.
>
> Memory is cheap.  Seriously, who should worry when any resolver big
> enough to have this issue is going to be a cluster:  Lets say I have a
> open recursive resolver for EVERYONE, and 1000 names uses this and are
> queried by EVERYONE, and I have netmask set to /24.
>
> The total caching space required is 16 Giga-entries.

Fair point re memory, but cache misses cost more than memory. They result
in higher load upstream.

>> I have to wonder whether the simpler solution to fix this is
>> not just to deploy more resolvers closer to the edge.
>
> Actually, that IS the fix:  Use the ISP's recursive resolver.
>
> This is necessary if you want to use something OTHER than the ISP's
> recursive resolver to work well on today's Internet.

I was presuming one problem is that the ISP's recursive resolver
is not topologically close to the source, given the draft authors
say:
:    When the Recursive Resolver does not use an IP address that appears
:    to be topologically close to the end user, the results returned by
:    those Authoritative Nameservers will be at best sub-optimal.

but if the whole problem is people using a DNS provider other than
the one they are "intended to" ...

> Do you want third-party DNS providers to not suck for youtube, akamai,
> Google, and a good fraction of the net people use every day?  If so, you
> need this.

... my answer would be "don't do that then". Either:
a) run your own recursive resolver on your local box (which is easy
   enough to do); or
b) run one on your own subnet; or
c) accept that if you use someone else's local resolver you will
   suffer

I suspect the reasons for using third party DNS providers are:

1. DHCP results in a dysfunctional resolver (e.g. the middlebox
   broken resolver). See draft-bellis-dns-recursive-discovery for
   a better way around that.

2. Their ISP's nameserver is broken/evil. I'm happy to leave that
   for the market to fix, rather than standardize a behavioural
   change in every caching resolver.

-- 
Alex Bligh


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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 12:16:57 -0800
To: Alex Bligh <alex@alex.org.uk>
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On Jan 28, 2010, at 11:51 AM, Alex Bligh wrote:

> Nicholas,
>=20
>>> * I am concerned that the IP included is the transport layer IP
>>> visible to the client/resolver. That might have little to do
>>> with the IP address from which a subsequent (e.g.) http connection
>>> appears to originate.
>>=20
>> Only VERY rarely.  Very few users in our observations with Netalyzr =
are
>> behind manually or automatically configured proxies which route =
traffic
>> through a different address from the remainder of their network =
traffic
>> (<3%), with 1/4 of those having the proxy in the same /24 subnet.
>=20
> I am surprised if that is the case and wonder whether you are reading
> my sentence in another way. So, e.g. take this set up
>=20
>                                192.168.0.2
>           192.0.2.0/24       |------------ Resolver
> Internet <-----------[NAT]---|
>                              |------------ Client
>                                192.100.0.3
>=20
> Now, the client IP address in the DNS query is going to 192.100.0.3.
> The resolver has no (reliable) way for finding out its external
> IP address. It may heuristically determine it is 192.0.2.1 (say)
> but that presumes that it doesn't have (e.g.) a forwarder configured.
> However, the current draft says it should use 192.168.0.2, but
> for the fact that is RFC1918 space, and it should thus discard
> it. Best case, the subsequent http connection (or whatever) appears
> to come from 192.0.2.0/24.

No, in that case, the resolver just reports NO IP address, and the =
internet relies on the external IP address being valid.  So there is no =
problem in that case.

> If you think my using NAT is cheating, then consider the example
> of (say) the university with no NAT, but a squid proxy. What's
> to say their internal resolvers are on the same /24 as the
> squid proxy?

They are, however, in the same closeness of network, so heck, the other =
side is quite happy.



I thought in particular you were referring to a case more like this

Client -> Non HTTP has an external IP of W.X.Y.Z
     \
      \-> HTTP proxy, HTTP traffic has an external IP at A.B.C.D

THIS is the case where the client's IP address, as externally viewed, =
differs for HTTP vs non-HTTP traffic.  That does occur, but its rare =
(~3% in measurements).  And when it does occur, the client could just as =
easily (and may very well already for the web browser) issue the DNS =
requests through the proxy as well.



>=20
>>> * I am concerned about section 4.3 causing algorithmic
>>> complexity, and an explosion in cache size. If NETMASK
>>> is set small, you will get a ton of records for
>>> www.google.com cached. That's going to be unworkable,
>>> which will encourage large settings for NETMASK.
>>=20
>> Memory is cheap.  Seriously, who should worry when any resolver big
>> enough to have this issue is going to be a cluster:  Lets say I have =
a
>> open recursive resolver for EVERYONE, and 1000 names uses this and =
are
>> queried by EVERYONE, and I have netmask set to /24.
>>=20
>> The total caching space required is 16 Giga-entries.
>=20
> Fair point re memory, but cache misses cost more than memory. They =
result
> in higher load upstream.

Thus what you want is the authority to be able to specify a broader =
netmask, if the upstream authority cares about load.  Do that, and the =
few upsteam authorities which would care about this could be able to =
prevent it.



>=20
>>> I have to wonder whether the simpler solution to fix this is
>>> not just to deploy more resolvers closer to the edge.
>>=20
>> Actually, that IS the fix:  Use the ISP's recursive resolver.
>>=20
>> This is necessary if you want to use something OTHER than the ISP's
>> recursive resolver to work well on today's Internet.
>=20
> I was presuming one problem is that the ISP's recursive resolver
> is not topologically close to the source, given the draft authors
> say:
> :    When the Recursive Resolver does not use an IP address that =
appears
> :    to be topologically close to the end user, the results returned =
by
> :    those Authoritative Nameservers will be at best sub-optimal.
>=20
> but if the whole problem is people using a DNS provider other than
> the one they are "intended to" ...

It isn't as close as one would LIKE, eg, comcast's list:
http://dns.comcast.net/dns-ip-addresses2.php

But its 'good enuf for CDN work'.  Better would be better, but the ISP =
resolvers are already giving out ENOUGH information for the CDN-like =
tricks to largely work.

>=20
>> Do you want third-party DNS providers to not suck for youtube, =
akamai,
>> Google, and a good fraction of the net people use every day?  If so, =
you
>> need this.
>=20
> ... my answer would be "don't do that then". Either:
> a) run your own recursive resolver on your local box (which is easy
>  enough to do); or

5% of the rather tech savvy Netalyzr users.  And that probably counts a =
lot of businesses behind single IP NATs.

> b) run one on your own subnet; or
> c) accept that if you use someone else's local resolver you will
>  suffer

So your advice to my mom is "Tough", basically.  Using a good =
third-party resolver is a minor change, your recommendations are much =
harder to instruct my mom to do.

> I suspect the reasons for using third party DNS providers are:
>=20
> 1. DHCP results in a dysfunctional resolver (e.g. the middlebox
>  broken resolver). See draft-bellis-dns-recursive-discovery for
>  a better way around that.
>=20
> 2. Their ISP's nameserver is broken/evil. I'm happy to leave that
>  for the market to fix, rather than standardize a behavioural
>  change in every caching resolver.


3:  The third party resolver offers a significant value add, such as =
programmable blocking, automatic blocking of malicious sites, and far =
more agressive prefetching of common names and related information to =
speed up results.

People are NOT using OpenDNS, UltraDNS, or Google's public DNS because =
their ISP's resolver is broken/evil, they are using it because they =
offer real perceived benefits.

And this ISNT'T a behavioral change for every caching resolver.  One of =
the beauties of this scheme is ONLY the third-party resolvers and =
authorities which desire this behavior will need to implement this at =
all.  In fact, the Bind developers could say "No way in hell will WE =
implement this", but a few big recursive resolver providers and CDNs do, =
and it becomes a success and the problem is solved.



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From owner-namedroppers@ops.ietf.org  Thu Jan 28 12:22:08 2010
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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 12:19:15 -0800
To: Ted Hardie <ted.ietf@gmail.com>
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On Jan 28, 2010, at 11:55 AM, Ted Hardie wrote:
> And that's the crux of the problem here--this is encouraging
> a part of the infrastructure to pass an association about the query =
stream
> to an upstream that they didn't before.  Sure, that can be used to =
provide
> better service.  But it can be used for other things as well, and =
there seems
> to be no mechanism provided to allow the client to signal its =
willingness or
> unwillingness to have this invoked on its behalf; without that, I =
would be
> somewhat reluctant to see it in the wild.

Except this concern is silly in most cases:  The added information flow =
is from the third party server to the authority server for the domain.

Yet what is the returned value for?  So the client can contact the final =
server. =20

The client has ALREADY given up the privacy to the third party DNS =
resolver, the additional privacy leakage thereafter would be trivial.



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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
Date: Thu, 28 Jan 2010 12:17:51 -0800
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On Jan 28, 2010, at 11:45 AM, Paul Vixie wrote:
>>=20
>> Actually, that IS the fix:  Use the ISP's recursive resolver.
>>=20
>> This is necessary if you want to use something OTHER than the ISP's
>> recursive resolver to work well on today's Internet.
>=20
> i love how somebody else (CDN providers) violate all existing =
assumptions
> (by creating requestor-specific DNS replies) which then makes the =
Internet
> work "less well" for lots of people... who are then constrained from =
doing
> what were previously reasonable things (like using distant recursive =
servers).

Why?  IMO, its a great strategy, simply because it not only works WELL =
for most users (it only fails those who want third party DNS resolvers),=20=


>=20
>> Do you want third-party DNS providers to not suck for youtube, =
akamai,
>> Google, and a good fraction of the net people use every day?  If so, =
you
>> need this.
>=20
> if youtube and akamai and google want to suck, let them suck.  they =
weren't
> the first movers and they won't be the last and redrawing the protocol =
to
> support their flawed technical model is not in the global system's =
interest.

Too late.  They are established.  Your protocol has been rewritten for =
this.

> this incoherency should be dealt with more harshly, perhaps by =
minimizing
> TTL to 5 minutes, and sharing a single DNS cache across global =
providers.
>=20
> any CDN who relies on what i call "stupid DNS tricks" to deliver their
> advantage should upgrade to something at the WWW layer, and leave DNS =
alone.

Except THIS assumes that the only load-balancing one wants to do is at =
the WWW layer, and its possible.  EG, you have this stupid same-origin =
stuff all over the place on the web that prevents a lot of WWW layer =
tricks from working.


> especially with DNSSEC coming.

DNSSEC makes no difference to this.  You know the addresses you are =
going to return in advance.




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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Tony Finch <dot@dotat.at>
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Subject: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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References: <7c31c8cc1001271556w4918093er6e94e07cb92c4dc4@mail.gmail.com> <6184.1264657589@nsa.vix.com> <alpine.LSU.2.00.1001281432290.28066@hermes-2.csi.cam.ac.uk>
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On Thu, Jan 28, 2010 at 02:32:51PM +0000,
 Tony Finch <dot@dotat.at> wrote 
 a message of 13 lines which said:

> And implementation name and version number?

Why, when we have RFC 5001 ?


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From owner-namedroppers@ops.ietf.org  Thu Jan 28 12:56:58 2010
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Date: Thu, 28 Jan 2010 20:49:38 +0000
From: Alex Bligh <alex@alex.org.uk>
Reply-To: Alex Bligh <alex@alex.org.uk>
To: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org, Alex Bligh <alex@alex.org.uk>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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--On 28 January 2010 12:16:57 -0800 Nicholas Weaver 
<nweaver@ICSI.Berkeley.EDU> wrote:

> 3:  The third party resolver offers a significant value add, such as
> programmable blocking, automatic blocking of malicious sites, and far
> more agressive prefetching of common names and related information to
> speed up results.
>
> People are NOT using OpenDNS, UltraDNS, or Google's public DNS because
> their ISP's resolver is broken/evil, they are using it because they offer
> real perceived benefits.
>
> And this ISNT'T a behavioral change for every caching resolver.  One of
> the beauties of this scheme is ONLY the third-party resolvers and
> authorities which desire this behavior will need to implement this at
> all.  In fact, the Bind developers could say "No way in hell will WE
> implement this", but a few big recursive resolver providers and CDNs do,
> and it becomes a success and the problem is solved.

Hmmm... ok, part of my objection was to lines like (from 4.1)
 "In the reply, the server MUST include an edns-client-ip option."
On your reading, that MUST only means "where the incoming query
has the option set AND where the server is using the data in
some way". It doesn't, however, say that. I think it should be
clear that a server, whether or not it the software supports
the draft, and whether or not it is configured to return
answers with this option for some queries, is always free
to discard the edns client ip option (i.e. treat it as if
it isn't there). I don't see a particular problem with it using
the data silently then not returning a netmask. In which case
the MUST should simply read "MAY".

But if the idea of this is to institute a signaling mechanism between
caching resolvers that are non-local to their users (and you
say these are >= 97% third party resolvers) and certain authoritive
nameservers, why insist that the IP address passed is the IP
address of the client, which gets you into all these NAT problems.
Why not just allow the end user to specify an arbitrary IP address
which is the IP address he'd like authoritative nameserver to
treat as the source address for the query (possibly with a netmask
to indicate which bits are accurate), rather than saying he MUST
use the local IP address etc. etc.; so I could configure my
local (behind NAT) resolver with the external IP address.
And the privacy-paranoid could just pick any IP they know to
be in the same AS / network locality / whatever. Rather than
"client-ip-option" it is a sort of "source-hint-option".
This would also be useful in debugging problems to do with DNS
'cleverness' too (e.g. "dig +source-hint=x.x.x.x ....").

-- 
Alex Bligh


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Date: Thu, 28 Jan 2010 21:11:20 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
To: Paul Vixie <vixie@isc.org>
Cc: namedroppers@ops.ietf.org
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On Thu, Jan 28, 2010 at 7:45 PM, Paul Vixie <vixie@isc.org> wrote:>
> i love how somebody else (CDN providers) violate all existing assumptions
> (by creating requestor-specific DNS replies) which then makes the Interne=
t
> work "less well" for lots of people... who are then constrained from doin=
g
> what were previously reasonable things (like using distant recursive serv=
ers).

Can you expand upon the "less well" ?

>> Do you want third-party DNS providers to not suck for youtube, akamai,
>> Google, and a good fraction of the net people use every day? =A0If so, y=
ou
>> need this.
>
> if youtube and akamai and google want to suck, let them suck. =A0they wer=
en't
> the first movers and they won't be the last and redrawing the protocol to
> support their flawed technical model is not in the global system's intere=
st.

Surely a large point of extension mechanisms is to cater for unusual
and ad-hoc circumstances in an interoperable way?

> this incoherency should be dealt with more harshly, perhaps by minimizing
> TTL to 5 minutes, and sharing a single DNS cache across global providers.

Why?

> any CDN who relies on what i call "stupid DNS tricks" to deliver their
> advantage should upgrade to something at the WWW layer, and leave DNS alo=
ne.
>
> especially with DNSSEC coming.

This I-D seems interoperable with DNSSEC, even NSEC3, on my reading.

--=20
Colm


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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 13:13:38 -0800
To: Alex Bligh <alex@alex.org.uk>
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On Jan 28, 2010, at 12:49 PM, Alex Bligh wrote:

>=20
>=20
> --On 28 January 2010 12:16:57 -0800 Nicholas Weaver =
<nweaver@ICSI.Berkeley.EDU> wrote:
>=20
>> 3:  The third party resolver offers a significant value add, such as
>> programmable blocking, automatic blocking of malicious sites, and far
>> more agressive prefetching of common names and related information to
>> speed up results.
>>=20
>> People are NOT using OpenDNS, UltraDNS, or Google's public DNS =
because
>> their ISP's resolver is broken/evil, they are using it because they =
offer
>> real perceived benefits.
>>=20
>> And this ISNT'T a behavioral change for every caching resolver.  One =
of
>> the beauties of this scheme is ONLY the third-party resolvers and
>> authorities which desire this behavior will need to implement this at
>> all.  In fact, the Bind developers could say "No way in hell will WE
>> implement this", but a few big recursive resolver providers and CDNs =
do,
>> and it becomes a success and the problem is solved.
>=20
> Hmmm... ok, part of my objection was to lines like (from 4.1)
> "In the reply, the server MUST include an edns-client-ip option."
> On your reading, that MUST only means "where the incoming query
> has the option set AND where the server is using the data in
> some way". It doesn't, however, say that. I think it should be
> clear that a server, whether or not it the software supports
> the draft, and whether or not it is configured to return
> answers with this option for some queries, is always free
> to discard the edns client ip option (i.e. treat it as if
> it isn't there). I don't see a particular problem with it using
> the data silently then not returning a netmask. In which case
> the MUST should simply read "MAY".

Agreed.  Perhaps the best way is something like the following rules:


The authority MUST NOT use an EDNS0 client-ip-option if the request did =
not include a client-ip-option [1]

The authority MAY specify a broader netmask in the returned value [2]


When the resolver's own address is a publically-routable address, it =
SHOULD use the request's source IP address as the basis for the =
client-ip-option value, if no client-ip-option value was specified in =
the request [3]

If the resolver's own address is a non-routable address, it MUST NOT =
generate a client-ip-option value, but may pass a client-ip-option value =
[3]

If the resolver receives a request with a client-ip-option value, it =
should either REMOVE this value or pass it unchanged, it must not modify =
this value [4]


The resolver which uses or creates client-ip-option values SHOULD keep =
track of any authority which ignores or responds with an error for a =
request containing a client-ip-option but responds properly for the same =
request without a client-ip-option.  After three such failures, the =
resolver should remove all client-ip-option values in communication with =
this authority [5]




[1] Ensures that authority changes will not affect non-compliant =
resolvers

[2] Ensures that the authority if it cares about load, can specify a =
broader netmask.

[3] Removes the need for client changes under most conditions.  Prevents =
the NAT from being an issue.

[4] ALLOWS clients to take advantage of this, but doesn't requires it.

[5] Ensures that resolver changes will not prevent names from resolving.


As a result, you get a system where:

a) Partial deployment works with just changes to the authorities and =
resolvers which care about this feature.

b) Authorities, resolvers, and clients which don't implement this =
feature won't see an effect.


As important, the number of servers which would need to implement this =
feature is low, but the number of USERS which would benefit is =
substantial.


> But if the idea of this is to institute a signaling mechanism between
> caching resolvers that are non-local to their users (and you
> say these are >=3D 97% third party resolvers) and certain authoritive
> nameservers, why insist that the IP address passed is the IP
> address of the client, which gets you into all these NAT problems.

Actually, the external address of the request is the right answer for =
all these NATs, so there is no problem.

> Why not just allow the end user to specify an arbitrary IP address
> which is the IP address he'd like authoritative nameserver to
> treat as the source address for the query (possibly with a netmask
> to indicate which bits are accurate), rather than saying he MUST
> use the local IP address etc. etc.; so I could configure my
> local (behind NAT) resolver with the external IP address.
> And the privacy-paranoid could just pick any IP they know to
> be in the same AS / network locality / whatever. Rather than
> "client-ip-option" it is a sort of "source-hint-option".
> This would also be useful in debugging problems to do with DNS
> 'cleverness' too (e.g. "dig +source-hint=3Dx.x.x.x ....").

Sounds good, and makes sense.  But in absence of a client-specified =
value, the default value should be derived from the request's SRC =
address.



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From: Alex Bligh <alex@alex.org.uk>
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To: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Paul Vixie <vixie@isc.org>, namedroppers@ops.ietf.org, Alex Bligh <alex@alex.org.uk>
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--On 28 January 2010 13:13:38 -0800 Nicholas Weaver 
<nweaver@ICSI.Berkeley.EDU> wrote:

> Sounds good, and makes sense.  But in absence of a client-specified
> value, the default value should be derived from the request's SRC address.

(Putting aside general unconvincedness about further protocol alterations
to support a hack some might argue should not exist...)

I don't mind a default. What I was objecting to is restricting the
field's use to "the public IP address or nothing". Why disallow
manual configuration? I'd just allow both client and caching
resolver to put in anything they want they think might be useful
for the authoritative server to look at. It means "if you want,
pretend the query came from this IP address rather than looking
at the transport layer IP address". I can then (e.g.) use opendns
and say I'd like the query to be treated like one that came
from (e.g.) one of comcast's DNS servers (specifying its IP address).

-- 
Alex Bligh


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> Date: Thu, 28 Jan 2010 21:11:20 +0000
> From: Colm MacC=E1rthaigh <colm@allcosts.net>
>=20
> Can you expand upon the "less well" ?

i can't.  i've been told that because of stupid dns tricks, youtube sucks
for people whose recursive dns doesn't share fate and path with their tcp
stack.  i'm just parroting what i've been told, without understanding.  but
apparently this is the raison e'tre for the "client-ip" option so it's
likely true.

> > this incoherency should be dealt with more harshly, perhaps by
> > minimizing TTL to 5 minutes, and sharing a single DNS cache across
> > global providers.
>=20
> Why?

because i like caching, and because i don't think the dns q-tuple should be
expanded to include more elements.  because dns is a phat target for folks
whose business models require cost-shifting from their edge to our middle.
oh hell, i said all this in the acm queue article:

http://queue.acm.org/detail.cfm?id=3D1647302

and since i mentioned q-tuple complexity, see also:

http://queue.acm.org/detail.cfm?id=3D1242499


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At 18:56 27/01/2010, Wilmer van der Gaast wrote:
>Hello everyone,
>
>I spoke to Olafur about this idea in Hiroshima last year. I'm afraid
>the deadline for Anaheim already passed, but we hope we can discuss it
>on-line in the meantime and decide if it should become a WG item in
>Maastricht later this year.

<dnsex-chair-hat=on>

For the record, Wilmer and I had a discussion on how to submit Internet
drafts, and why the draft he was proposing was had to be submitted
as independent submission. I did no endorse or discourage this idea.

</dnsext-chair-hat=off>

>To summarize the I-D: It specifies an EDNS0 option that carries IP
>address information (by default only the first 24 bits to preserve
>privacy) of the user that triggered a DNS resolution. This should
>allow authoritative nameservers that give geo-targeted responses to be
>more accurate, even in cases where the resolver and its users aren't
>close to each other. To preserve the ability to cache such responses
>efficiently, the option in the response can indicate which exact
>subnet it should be cached for.

>Comments are more than welcome.

<no-hat>
In the introduction the term "sub-optimal" is used with out defining
for who and in what context, traffic delay or content. Just because a
computer happens to have an IP address that is registered to be in
Austria does not mean that I'm interested in any Austrian content
when I visit a news site like Reuters.com.

Some people made the not-always-correct assumption that addresses on
DNS questions are an good/decent/reasonable indicator of location.
That does not mean it is DNS protocol role to make their life easier
or to fix their misconception.

The proposal in the draft moves almost all the cost of fixing the
"problem" to the Recursive resolvers. Both by adding the option to the
queries, and by the onerous requirement to fragment their internal cache
based on source address of the stub-resolvers.
This moves the cost of solving the "problem" from the CDN providers to the
recursive resolvers operators, and I question if that is fair or justified.

As Ed Lewis keeps saying "We need problem statements, before proposed 
solutions" and this draft fails to convince me there is a problem that
is worth the working groups time or the mailing list bandwidth.


<dnsext-chair-hat=on>
The open question for the working group is the following:
"Is it one of DNS roles to provide information on where the query
originated from?"

If the answer is yes then we can take on some work in this area.

         Olafur



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From owner-namedroppers@ops.ietf.org  Thu Jan 28 14:58:29 2010
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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Thu, 28 Jan 2010 14:51:55 -0800
To: Olafur Gudmundsson <ogud@ogud.com>
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On Jan 28, 2010, at 2:06 PM, Olafur Gudmundsson wrote:
> The proposal in the draft moves almost all the cost of fixing the
> "problem" to the Recursive resolvers. Both by adding the option to the
> queries, and by the onerous requirement to fragment their internal =
cache
> based on source address of the stub-resolvers.
> This moves the cost of solving the "problem" from the CDN providers to =
the
> recursive resolvers operators, and I question if that is fair or =
justified.

OTOH, it only moves the cost of fixing the problem to the recursive =
resolvers where it IS a problem, as the ISP recursive resolvers, and =
self-run recursive resolvers, shouldn't generally have this as an issue.

> <dnsext-chair-hat=3Don>
> The open question for the working group is the following:
> "Is it one of DNS roles to provide information on where the query
> originated from?"

A different way of phrasing the question embedded in this draft:=20

A significant and well established usage has, largely but not completely =
correctly, assumed that the DNS query address as seen by the authority =
provides meaningful information on the client's network location, as a =
side consequence of DNS resolution either being provided by the network =
provider or as part of the end network's own systems.

Should DNS enable this assumption to continue when DNS resolution is =
provided by a different party than network transport?



From owner-namedroppers@ops.ietf.org  Thu Jan 28 15:27:46 2010
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From: Paul Vixie <vixie@isc.org>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
In-Reply-To: Your message of "Thu, 28 Jan 2010 17:06:43 EST." <201001282206.o0SM6m8a000684@stora.ogud.com> 
References: <7c31c8cc1001271556w4918093er6e94e07cb92c4dc4@mail.gmail.com>  <201001282206.o0SM6m8a000684@stora.ogud.com> 
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> Date: Thu, 28 Jan 2010 17:06:43 -0500
> From: Olafur Gudmundsson <ogud@ogud.com>
> 
> >Comments are more than welcome.
> 
> <no-hat>
> ...
> Some people made the not-always-correct assumption that addresses on
> DNS questions are an good/decent/reasonable indicator of location.
> That does not mean it is DNS protocol role to make their life easier
> or to fix their misconception.
> 
> The proposal in the draft moves almost all the cost of fixing the
> "problem" to the Recursive resolvers. Both by adding the option to the
> queries, and by the onerous requirement to fragment their internal cache
> based on source address of the stub-resolvers.  This moves the cost of
> solving the "problem" from the CDN providers to the recursive resolvers
> operators, and I question if that is fair or justified.

in fairness, this would be optional behaviour, ignored by authorities who
had no interest in it, and elided by recursives who had no interest in it.

so even though i'm against making dns incoherency any easier than it always
has been, i think that an industry-specific codepoint (where people whose
recursives were global wanted to share client ip information with people
whose web servers were global) and an industry-specific specification ought
to be possible within the IETF framework.

that may mean it's experimental or something.  it could never become a full
or recommended standard given the cost shifting arguments olafur made above
which are pretty much inarguable, but some codepoints and features will
always be industry specific since they'll have no general purpose use.

> <dnsext-chair-hat=on>
> The open question for the working group is the following:
> "Is it one of DNS roles to provide information on where the query
> originated from?"
> 
> If the answer is yes then we can take on some work in this area.

my answer is no.  the q-tuple is right-sized today.


From owner-namedroppers@ops.ietf.org  Thu Jan 28 16:24:41 2010
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--On 28 January 2010 17:06:43 -0500 Olafur Gudmundsson <ogud@ogud.com> 
wrote:

> "Is it one of DNS roles to provide information on where the query
> originated from?"

Define "where".

-- 
Alex Bligh


From owner-namedroppers@ops.ietf.org  Thu Jan 28 16:56:16 2010
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On 2010-01-28, at 12:56, Wilmer van der Gaast wrote:

> To summarize the I-D: It specifies an EDNS0 option that carries IP
> address information (by default only the first 24 bits to preserve
> privacy) of the user that triggered a DNS resolution.

My initial reading of the proposal suggests that the client that =
originates the DNS request is the one that MAY populate a client-address =
option, and that any other resolver or proxy in the chain between the =
client and a server (cache or authority) which supplies an answer MAY =
NOT change the client-address option data.

Suppose most clients are numbered using RFC 1918 addresses behind a NAT, =
and have no trivial way of discovering a non-RFC1918 address that the =
world might see them as. In that case isn't the address information that =
ultimately arrives at cache or authority nameservers useless for any =
purpose other than identifying that RFC 1918 addresses are in use?

I have some suggestions that relate specifically to the text, but the =
general utility of the proposal seems limited to me: I have doubts that =
there are significant client populations in 2010 which have useful =
address information to send.


Joe



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From: Mark Andrews <marka@isc.org>
References: <7c31c8cc1001271556w4918093er6e94e07cb92c4dc4@mail.gmail.com> <BB12CD2F-7371-4A45-9FF1-322ABAE84418@hopcount.ca> 
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt 
In-reply-to: Your message of "Fri, 29 Jan 2010 13:49:30 +1300." <BB12CD2F-7371-4A45-9FF1-322ABAE84418@hopcount.ca> 
Date: Fri, 29 Jan 2010 13:05:21 +1100
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In message <BB12CD2F-7371-4A45-9FF1-322ABAE84418@hopcount.ca>, Joe Abley writes:
> 
> On 2010-01-28, at 12:56, Wilmer van der Gaast wrote:
> 
> > To summarize the I-D: It specifies an EDNS0 option that carries IP
> > address information (by default only the first 24 bits to preserve
> > privacy) of the user that triggered a DNS resolution.
> 
> My initial reading of the proposal suggests that the client that =
> originates the DNS request is the one that MAY populate a client-address =
> option, and that any other resolver or proxy in the chain between the =
> client and a server (cache or authority) which supplies an answer MAY =
> NOT change the client-address option data.
> 
> Suppose most clients are numbered using RFC 1918 addresses behind a NAT, =
> and have no trivial way of discovering a non-RFC1918 address that the =
> world might see them as. In that case isn't the address information that =
> ultimately arrives at cache or authority nameservers useless for any =
> purpose other than identifying that RFC 1918 addresses are in use?
> 
> I have some suggestions that relate specifically to the text, but the =
> general utility of the proposal seems limited to me: I have doubts that =
> there are significant client populations in 2010 which have useful =
> address information to send.

The presumption is that recursive resolvers would not set the option
if they receive the query from a RFC 1918 (or otherwise deemed
private) address.  The first recursive resolver which received a
query from a non private address would add the option to any upstream
queries made on behalf of the client.

Note you don't need to know your address to make this decision as
it is based entirely on the source address from which you receive
the query.  All the nameservers involved could be on machines using
private address and provided they are not behind a NAT that collapses
the world down to a single address this will just work.  The outbound
NAT sets the source address to a public address and the inbound NAT
preserves it.

This is not a option which would be normally be sent stub resolvers.
This is not a option that works when there are multiple exit points
from the private net and the internal nameserver uses a different
exit point to the actual client.  The presumption is that there is
a single exit point.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org


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To: Alex Bligh <alex@alex.org.uk>, Olafur Gudmundsson <ogud@ogud.com>, Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
From: Olafur Gudmundsson <ogud@ogud.com>
Subject: Re: [dnsext] Re: I-D  ACTION:draft-vandergaast-edns-client-ip-00.txt
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At 19:16 28/01/2010, Alex Bligh wrote:


>--On 28 January 2010 17:06:43 -0500 Olafur Gudmundsson <ogud@ogud.com> wrote:
>
>>"Is it one of DNS roles to provide information on where the query
>>originated from?"
>
>Define "where".

That is part of the question, some people may argue "where" can be one of
         IP address,
         GPS coordinates
         application name
         Opaque identifier
         combination of different coordinates
or something  different

         Olafur



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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00
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On 29 Jan 2010 00:16:21 +0000, Alex Bligh wrote:
> On 28 Jan 2010 17:06:43 -0500 Olafur Gudmundsson <ogud@ogud.com> wrote:
>
>    "Is it one of DNS roles to provide information on where the query
>     originated from?"
>
> Define "where".

That's the _primary_ question to be elaborated upon in a proper
problem statement that indeed SHOULD precede a proposed solution.

>
> --
> Alex Bligh


BTW #1:
  Has anybody of the draft authors considered interaction with
  IP Mobility?   Please study MIP4, MIP6, PMIP6, Network Mobility,
  and all the flavors and optimization techniques already specified
  and/or currently being revised and advanced on the Standards Track!

BTW #2:
  It's one of the annoyances I repeatedly suffer from:
  Wanting purposely an answer specifically from www.google.com or
  say, www.google.fr, and then being redirected to www.google.de .

  IMO, increasing lack of transparency in the middle is the real
  problem we have.  Ever increasing "intelligence" in the middle
  (and the core) limits the future evolution of IP networking,
  and causes an ever increasing mess of hacks necessary to overcome
  the limitations enforced by these so-called "helpers".
  All this increases fragility.

BTW #3
  For content distribution, I observe that knowledge of
  straightforward techniques seems to have eroded substantially.
  HTML has BASE refs, which obviously mostly aren't used any more
  as intended, and HTTP has redirects.
  It is this application layer where user preferences and properties
  should be used (under strict policy control by the end user) to
  influence the content being served.
  Let the user decide, on a per-service or per-resource base,
  when and where he would like to get assistance by "helpers",
  and co-locate these with the service, not the core or the middle!

BTW #4:
  Did you consider the consequences for error diagnostic, help desk
  functions, etc., of adding even more 'cheating' to the DNS?
  When a user does not get what he wants and the help desk located
  in, say, India, wants to reproduce the problem the user in, say,
  Ireland, has -- how many time and effort will it cost to figure
  out what's going wrong when both do not obtain the same responses
  for DNS queries sent to the public Internet?
  Does that outweigh the "commodity" of a few "global players" ?

  The primary objective of the DNS is consistency.

RFC 1034, Section 2.2, "DNS Design Goals" starts with:

   - The primary goal is a consistent name space which will be used
     for referring to resources.

... and later containss:

   - We want name server transactions to be independent of the
     communications system that carries them.  [...]

Independence of "the communications system" implies independence of
addresses used in the network layer carrying the transactions.

>From this it should be clear that the answer to Olafur's initial
question is: "no".


Kind regards,
  Alfred HÎnes.

-- 

+------------------------+--------------------------------------------+
| TR-Sys Alfred Hoenes   |  Alfred Hoenes   Dipl.-Math., Dipl.-Phys.  |
| Gerlinger Strasse 12   |  Phone: (+49)7156/9635-0, Fax: -18         |
| D-71254  Ditzingen     |  E-Mail:  ah@TR-Sys.de                     |
+------------------------+--------------------------------------------+



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From owner-namedroppers@ops.ietf.org  Thu Jan 28 23:04:13 2010
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Date: Fri, 29 Jan 2010 06:54:58 +0000
From: Alex Bligh <alex@alex.org.uk>
Reply-To: Alex Bligh <alex@alex.org.uk>
To: Olafur Gudmundsson <ogud@ogud.com>, Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
cc: Alex Bligh <alex@alex.org.uk>
Subject: Re: [dnsext] Re: I-D   ACTION:draft-vandergaast-edns-client-ip-00.txt
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--On 28 January 2010 21:09:52 -0500 Olafur Gudmundsson <ogud@ogud.com> 
wrote:

>>> "Is it one of DNS roles to provide information on where the query
>>> originated from?"
>>
>> Define "where".
>
> That is part of the question, some people may argue "where" can be one of
>          IP address,
>          GPS coordinates
>          application name
>          Opaque identifier
>          combination of different coordinates
> or something  different

OK. I am in the "unconvinced" camp.

The draft doesn't adequately define the problem statement (which
could be fixed), but discussions here suggest it is in essence
that an undocumented and unstandardised hack (using transport
IP source address as a hint for network topology - i.e.
a "where" indicator) is an imperfect heuristic in particular
circumstances (i.e. remote resolvers). The proposed response
is not to standardise the hack itself, but to provide a
facility usable in some cases only to transmit a garbled
"where" indicator that some of those operating that heuristic
might use.

Olafur's question says "should DNS provide information on [something]".
My answer is "not without (a) defining what that something is, and
(b) standardising the use/consumption of that data". We appear to
be trying to standardise its source and transport, without defining
the other end (what the authoritative nameserver might do with it).

If we're going to add yet another saddle-bag to the DNS pony and say
that an authoritative DNS server should be able to answer queries
based on information other than in the QUERY section (e.g. "where"
the source of the query comes from), we should be honest and
come out and say that, rather than document just the effects
elsewhere in the system.

-- 
Alex Bligh


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From owner-namedroppers@ops.ietf.org  Fri Jan 29 01:12:29 2010
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From: Martin Barry <marty@supine.com>
To: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Message-ID: <20100129090542.GB8361@tigger.mamista.net>
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Just a small comment on "dns-tricks" versus "routing-tricks".

$quoted_author = "Paul Vixie" ;
> 
> because i like caching, and because i don't think the dns q-tuple should be
> expanded to include more elements.  because dns is a phat target for folks
> whose business models require cost-shifting from their edge to our middle.
> oh hell, i said all this in the acm queue article:
> 
> http://queue.acm.org/detail.cfm?id=1647302

"Anycast TCP is also in use by a few CDNs and works at least as well as any
DNS-layer solution. Anycast is stable for minutes or hours at a time, so
it's rare for two TCP packets to the same destination to reach different
anycast contributors."

Anycast usually implies a /24 used for a single service or group of
services. This limits "routing-tricks" to those that have a spare /24, speak
BGP in multiple locations and can justify polluting the global routing table
with another /24.

Conversely "dns-tricks" can be, and are, used by those who don't meet the
above criteria. The only limitations are having authorative servers capable
of applying the "tricks".

Both imply some burden shifting in order to provide "better" service to the
end user.

cheers
Marty


From owner-namedroppers@ops.ietf.org  Fri Jan 29 01:38:50 2010
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Date: Fri, 29 Jan 2010 09:32:04 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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On Fri, Jan 29, 2010 at 2:16 AM, Alfred H=CEnes <ah@tr-sys.de> wrote:
> =A0The primary objective of the DNS is consistency.

That really doesn't seem like a reasonable position. Consistency is
the part of Brewer's CAP theorem that DNS sacrifices (in favour of
availability and partition tolerance). If consistency was the primary
objective then all TTLs would be 0 and there would be synchronous
atomic updates only. DNS is intentionally inconsistent by design.

The primary objective of the DNS is a naming service for the internet.
The market has decided that it is useful to be able to transport users
and clients to independent network nodes based on network proximity,
and IP anycast does not seem to do an acceptable job. It does seem
like a useful property of the network that this functionality be
available. My problem statement would be :

    "In-use methods for transparently directing internet clients to
their their most proximate internet servers are not interoperable or
published, causing suboptimal internet performance".

Even critics of the I-D are suggesting that more widely-distributed
resolvers would be a better solution. I don't understand this - a more
broadly distributed base would necessarily have poorer caching
efficiency, and so likely degrade the DNS performance, and it would
still imply that auth servers are generating incoherent answers based
on source.

--=20
Colm


From owner-namedroppers@ops.ietf.org  Fri Jan 29 01:48:51 2010
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Date: Fri, 29 Jan 2010 09:43:58 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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On Fri, Jan 29, 2010 at 9:05 AM, Martin Barry <marty@supine.com> wrote:
> "Anycast TCP is also in use by a few CDNs and works at least as well as any
> DNS-layer solution. Anycast is stable for minutes or hours at a time, so
> it's rare for two TCP packets to the same destination to reach different
> anycast contributors."

This statement is not supported by data, and does not seem credible.
While anycast is stable, there is no reason to believe that it works
at least as well as a DNS-layer solution.  At my previous employer
(Joost.com) we ran a small private CDN for P2P seeding, video and
image and distribution, using both anycast and DNS tricks. DNS tricks
proved to be at least twice as good at lowering network latencies,
though granted we were not particularly well-peered and had only a
handful of transit providers.

Anycast directionality is essentially out of the hands of the service
provider and the behaviour depends on such things as upstream transit,
filtering and peering policies. In contrast, DNS tricks are
controllable on a very granular basis. The biggest problem with DNS
tricks is that there may be a anti-correlation between the resolver's
locality and its users - which this I-D is specifically an attempt to
fix.

> Conversely "dns-tricks" can be, and are, used by those who don't meet the
> above criteria. The only limitations are having authorative servers capable
> of applying the "tricks".

+1

-- 
Colm


From owner-namedroppers@ops.ietf.org  Fri Jan 29 02:00:44 2010
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From: Alex Bligh <alex@alex.org.uk>
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00
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--On 29 January 2010 09:32:04 +0000 Colm MacC=C3=A1rthaigh =
<colm@allcosts.net>=20
wrote:

> Even critics of the I-D are suggesting that more widely-distributed
> resolvers would be a better solution. I don't understand this - a more
> broadly distributed base would necessarily have poorer caching
> efficiency, and so likely degrade the DNS performance, and it would
> still imply that auth servers are generating incoherent answers based
> on source.

I don't understand the model for that. If you have DNS Servers centrally,
serving multiple /16s or whatever, you do not have a single server or group
of servers sharing a coherent cache. You have several in a rack, probably
on anycast. If you push them out towards the edge, the number of separate
instances of a DNS cache does not necessarily increase much, assuming you
keep server load about the same. Even if there is an increase (from more
servers, each more lightly loaded), unless you increase the number of
servers such that there is one per /24, you are unlikely to have the same
effect as the draft.

We are both handwaving a bit here though, as this argument (on both
sides) has not had any numbers attached to it.

--=20
Alex Bligh


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Subject: [dnsext] a definition of consistency
Date: Fri, 29 Jan 2010 09:56:36 +0000
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On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:

> If consistency was the primary objective then all TTLs would be 0 =20
> and there would be synchronous atomic updates only. DNS is =20
> intentionally inconsistent by design.

That depends on the definition of consistency. Sure, DNS is loosely =20
consistent because of cacheing and zone propagation latency. However =20
there is a higher level consistency that is unwritten (and probably =20
needs to be formally documented). This is the principle of uniformity. =20=

ie No matter where you are or what software you use or which server(s) =20=

you query, the DNS always returns the same answer for the same lookup.

IMO facilitating "stupid DNS tricks" as Paul put it undermines the =20
cornerstone of what the DNS is all about.=


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On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:

> The market has decided

No! A small segment of the people using the DNS have decided, not "the =20=

market". Besides, markets are not infallible. And this list is about =20
engineering, not marketing.=


From owner-namedroppers@ops.ietf.org  Fri Jan 29 02:15:10 2010
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Subject: [dnsext] mangling DNS responses based on proximity
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On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:

> My problem statement would be :
>
>    "In-use methods for transparently directing internet clients to
> their their most proximate internet servers are not interoperable or
> published, causing suboptimal internet performance".

Define "most proximate". It is hop count? RTT? Fastest/least congested =20=

pipe(s)? Quickest or least loaded routers? Most stable/reliable route? =20=

Best/cheapest path via the corporate firewalls?

Even if a DNS server could be made to figure this out -- I doubt that =20=

-- it doesn't follow that the decision it makes will always be the =20
right one for the end client. The server can't possibly have a clue =20
about local policy at the client.=


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On 28 Jan 2010, at 22:06, Olafur Gudmundsson wrote:

> As Ed Lewis keeps saying "We need problem statements, before  
> proposed solutions" and this draft fails to convince me there is a  
> problem that
> is worth the working groups time or the mailing list bandwidth.

+1



From owner-namedroppers@ops.ietf.org  Fri Jan 29 02:22:03 2010
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00
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On Fri, Jan 29, 2010 at 9:57 AM, Alex Bligh <alex@alex.org.uk> wrote:
> I don't understand the model for that. If you have DNS Servers centrally,
> serving multiple /16s or whatever, you do not have a single server or group
> of servers sharing a coherent cache.

In many real-world cases, you do. Tiered hierarchies of caches and
shared caches are not uncommon. (I believe Comcast had this setup for
a while). Some vendors even retail shared caches as a feature. From
the outside looking in, it appears that Google Public DNS uses shared
caches internally to some extent too.  This is relatively easy to
confirm by observing incoming queries to an auth server Vs incoming
queries to Public DNS from many sources.

-- 
Colm


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Subject: [dnsext] Re: a definition of consistency
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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On Fri, Jan 29, 2010 at 9:56 AM, Jim Reid <jim@rfc1035.com> wrote:
> On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:
>
>> If consistency was the primary objective then all TTLs would be 0 and
>> there would be synchronous atomic updates only. DNS is intentionally
>> inconsistent by design.
>
> That depends on the definition of consistency. Sure, DNS is loosely
> consistent because of cacheing and zone propagation latency. However ther=
e
> is a higher level consistency that is unwritten (and probably needs to be
> formally documented). This is the principle of uniformity. ie No matter
> where you are or what software you use or which server(s) you query, the =
DNS
> always returns the same answer for the same lookup.

That paragraph is self-contradictory. Even ignoring the tricks, DNS
does not always return the same answer for the same lookup; by design.
TTLs of two days and higher are not uncommon, meaning this kind of
inconsistency (and if returning different answers cannot be called
inconsistency then I don't know what can) can last for days. Evidently
this property is not a real problem. The principal of strict
uniformity does not appear to matter very much. Real-world operators
are used to having to deal with this.

Taking the tricks into account, they've been use for over a decade
now, also evidently without any real problem. Again, the principal of
strict uniformity does not appear to matter.

> IMO facilitating "stupid DNS tricks" as Paul put it undermines the
> cornerstone of what the DNS is all about.

How does it actually lessen DNS's efficacy? What are the actual
engineering problems? I've read Paul's paper and other writings, and
can find no cogent argument. The objections seem dogmatic rather than
based on the real-world use-cases and properties of the protocol.

--=20
Colm


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Date: Fri, 29 Jan 2010 11:28:52 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Jim Reid <jim@rfc1035.com>
Cc: Colm =?iso-8859-1?Q?MacC=E1rthaigh?= <colm@allcosts.net>, Alfred =?iso-8859-1?Q?H=CEnes?= <ah@tr-sys.de>, namedroppers@ops.ietf.org
Subject: [dnsext] Re: mangling DNS responses based on proximity
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Your subject is completely inappopriate: since this is the
authoritative name server which decides the answer (depending on some
input from the client), it cannot be called "mangling" (and that's why
this proposal is compatible with DNSSEC). By definition, the
authoritative name server decides what it wants to respond.

On Fri, Jan 29, 2010 at 10:12:01AM +0000,
 Jim Reid <jim@rfc1035.com> wrote 
 a message of 19 lines which said:

> Define "most proximate".

No, do not define it. The purpose of this WG is *not* to define
load-balancing or optimization algorithm. It is to standardize DNS
extensions. The draft under discussion do not (and rightly so) specify
*how* the authoritative name server will generate its answer, just how
the client can send it more information.

> It is hop count? RTT? Fastest/least congested pipe(s)? Quickest or
> least loaded routers? Most stable/reliable route?  Best/cheapest
> path via the corporate firewalls?

My mom told me never to follow the troll in the wood :-)

> Even if a DNS server could be made to figure this out -- I doubt
> that -- it doesn't follow that the decision it makes will always be
> the right one for the end client. The server can't possibly have a
> clue about local policy at the client.

That's an entirely new goal for the DNS: send data which is right for
the client. It never was intended to be used that way. The goal of the
DNS is to send to the client the answer that pleases the authoritative
name server. 

(For instance, it would be better for the client that a request for
www.microsoft.com sends back 198.182.196.56, the IP address of
www.linux.org, but this is not something the DNS should do.)




From owner-namedroppers@ops.ietf.org  Fri Jan 29 02:35:42 2010
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Subject: [dnsext] Re: mangling DNS responses based on proximity
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
To: Jim Reid <jim@rfc1035.com>
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On Fri, Jan 29, 2010 at 10:12 AM, Jim Reid <jim@rfc1035.com> wrote:
> On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:
>
>> My problem statement would be :
>>
>> =A0 "In-use methods for transparently directing internet clients to
>> their their most proximate internet servers are not interoperable or
>> published, causing suboptimal internet performance".
>
> Define "most proximate". It is hop count? RTT? Fastest/least congested
> pipe(s)? Quickest or least loaded routers? Most stable/reliable route?
> Best/cheapest path via the corporate firewalls?
>
> Even if a DNS server could be made to figure this out -- I doubt that -- =
it
> doesn't follow that the decision it makes will always be the right one fo=
r
> the end client. The server can't possibly have a clue about local policy =
at
> the client.

Figuring all of that out does not seem intractable, for one example of
such analysis;

http://research.google.com/archive/imc191/imc191.pdf

But the authoritative nameserver is free to use any criteria it
chooses, I guess it's simply in the operators interest to align the
criteria with what makes the most sense for users. Servers can measure
RTTs and Transfer times and so on ... so it seems like "having a clue"
is doable.

--=20
Colm


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Subject: [dnsext] stupid dns tricks and transport paths 
Date: Fri, 29 Jan 2010 10:31:27 +0000
References: <7c31c8cc1001271556w4918093er6e94e07cb92c4dc4@mail.gmail.com> <6184.1264657589@nsa.vix.com> <4966825a1001280807i768a33ccs98f809366bce33d8@mail.gmail.com> <48894.1264695230@nsa.vix.com> <50A91B20-5AC1-4819-91ED-E5141F068D48@wiggum.com> <52065.1264699087@nsa.vix.com> <FDD5D1103B8EA4D13C4A2C4C@Ximines.local> <EEAAE4BF-BBA9-4141-BECC-A8440715597F@icsi.berkeley.edu> <58729.1264707908@nsa.vix.com>  <6f5b6fe71001281311g6e1fdd05o84ba64837813a6fd@mail.gmail.com>  <64415.1264714867@nsa.vix.com>
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On 28 Jan 2010, at 21:41, Paul Vixie wrote:

> i've been told that because of stupid dns tricks, youtube sucks
> for people whose recursive dns doesn't share fate and path with  
> their tcp
> stack.  i'm just parroting what i've been told, without understanding.

I can't speak for youtube (whatever that is). However I can vouch from  
personal experience that stupid DNS tricks get it wrong, even when  
recursive DNS service and TCP traffic share the same path. English  
speakers can see this pretty much every time they connect to a hotel  
or coffee shop network in mainland Europe. The CDNs provide stuff in  
that country's national language -- good luck getting that right in  
Belgium or Switzerland -- rather than English. Similar problems arise  
in large corporate networks which have a small number of interconnects  
to the Internet: the CDNs decide the user is in Germany (say) because  
that's where the firewall or web proxy is located.


From owner-namedroppers@ops.ietf.org  Fri Jan 29 03:00:13 2010
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Date: Fri, 29 Jan 2010 10:53:46 +0000
From: Alex Bligh <alex@alex.org.uk>
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To: =?UTF-8?Q?Colm_MacC=C3=A1rthaigh?= <colm@allcosts.net>, namedroppers@ops.ietf.org
cc: Alex Bligh <alex@alex.org.uk>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00
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--On 29 January 2010 10:14:53 +0000 Colm MacC=C3=A1rthaigh =
<colm@allcosts.net>=20
wrote:

> On Fri, Jan 29, 2010 at 9:57 AM, Alex Bligh <alex@alex.org.uk> wrote:
>> I don't understand the model for that. If you have DNS Servers =
centrally,
>> serving multiple /16s or whatever, you do not have a single server or
>> group of servers sharing a coherent cache.
>
> In many real-world cases, you do. Tiered hierarchies of caches and
> shared caches are not uncommon. (I believe Comcast had this setup for
> a while). Some vendors even retail shared caches as a feature. From
> the outside looking in, it appears that Google Public DNS uses shared
> caches internally to some extent too.  This is relatively easy to
> confirm by observing incoming queries to an auth server Vs incoming
> queries to Public DNS from many sources.

Right, but tiered hierarchies of caching are going to broken by
the draft too, as they well have to key on more than the q-tuple.

--=20
Alex Bligh


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Subject: Re: [dnsext] stupid dns tricks and transport paths
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$quoted_author = "Jim Reid" ;
> 
> I can't speak for youtube (whatever that is). However I can vouch
> from personal experience that stupid DNS tricks get it wrong, even
> when recursive DNS service and TCP traffic share the same path.
> English speakers can see this pretty much every time they connect to
> a hotel or coffee shop network in mainland Europe. The CDNs provide
> stuff in that country's national language -- good luck getting that
> right in Belgium or Switzerland -- rather than English. Similar
> problems arise in large corporate networks which have a small number
> of interconnects to the Internet: the CDNs decide the user is in
> Germany (say) because that's where the firewall or web proxy is
> located.

I'm an Australian living in Frankfurt and I feel your pain.

However, it is a failing of the "CDN" application that the language is
determined by location rather than a more accurate guide like the HTTP
Accept-Language header.

It's perfectly appropriate that I hit the google.de cluster as it's "closer"
but it's the web applications fault that it chooses to server me Deutsch
rather than the Queen's English that my browser indicates I prefer.
 
cheers
Marty


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Date: Fri, 29 Jan 2010 12:32:54 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: namedroppers@ops.ietf.org
Subject: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Message-ID: <20100129113254.GA32401@nic.fr>
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On Thu, Jan 28, 2010 at 05:46:29AM +0000,
 Paul Vixie <vixie@isc.org> wrote 
 a message of 3 lines which said:

> if we're going to add client identity to the query, can we do so in
> a more general way?  i'd like to know lat-long, country, isp,
> language, and adult/child.  and the ip address should be
> multiprotocol, covering ipv6.

In the light of this remark, and of the one by Jim Reid about the
imperfection of load-balancing algorithms based on the IP address, may
I suggest two possibles changes to the draft:

1) A small an reasonable one, deleting every mention of the
load-balancing algorithm and just describing an EDNS option for
carrying the IP address of the desktop client to the authoritative
name server (which, being authoritative, could do what it wants with
it). This would suppress one opportunity to troll and would be in line
with the general IETF rule "protocol, not policy".

2) A more ambitious one (may be too ambitious), to have an EDNS option
code "Client info", with sub-codes and various fields (and a registry
at IANA to register these fields) to carry absolutely everything from
the desktop client to the authoritative name server. IP address
information would then be just a special case.




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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Alex Bligh <alex@alex.org.uk>
Cc: namedroppers@ops.ietf.org
Subject: [dnsext] Privacy in IP address indication (Was: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Thu, Jan 28, 2010 at 06:10:09PM +0000,
 Alex Bligh <alex@alex.org.uk> wrote 
 a message of 64 lines which said:

> I have read the draft.

Me too, otherwise I wouldn't comment.

>  Given people make DNS queries in general so they can communicate
>  with the (e.g.)  A record given, and the (e.g.) http server on that
>  IP address can log connections, what privacy is lost by
>  transmitting the address given in full?

This would lose a lot of privacy since the IP address of the "desktop"
client would be transmitted in full, not only to the HTTP server but
also to middlemen, the authoritative servers of the root, the TLD,
etc.

The draft has a provision for this (section 4.1) but it is just a MAY
and does not blend well with the general zone cut rules.

Also, the HTTP request may be through a proxy, too, so you cannot even
say that the HTTP server would know the address.

>  You leave this choice to the recursive resolver, I think, not the
>  client, and require that at least some bits are cleared.

The biggest privacy problem with the current draft is that, for the
"desktop" client, the use of the new extension is opt-out, not opt-in
(section 8.1) which disturbs me a lot.


From owner-namedroppers@ops.ietf.org  Fri Jan 29 03:49:26 2010
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From: Jim Reid <jim@rfc1035.com>
To: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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Subject: Re: [dnsext] Re: a definition of consistency
Date: Fri, 29 Jan 2010 11:43:38 +0000
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On 29 Jan 2010, at 10:23, Colm MacC=E1rthaigh wrote:

> On Fri, Jan 29, 2010 at 9:56 AM, Jim Reid <jim@rfc1035.com> wrote:
>> On 29 Jan 2010, at 09:32, Colm MacC=E1rthaigh wrote:
>>
>>> If consistency was the primary objective then all TTLs would be 0 =20=

>>> and
>>> there would be synchronous atomic updates only. DNS is intentionally
>>> inconsistent by design.
>>
>> That depends on the definition of consistency. Sure, DNS is loosely
>> consistent because of cacheing and zone propagation latency. =20
>> However there
>> is a higher level consistency that is unwritten (and probably needs =20=

>> to be
>> formally documented). This is the principle of uniformity. ie No =20
>> matter
>> where you are or what software you use or which server(s) you =20
>> query, the DNS
>> always returns the same answer for the same lookup.
>
> That paragraph is self-contradictory.

Not really Colm. The higher level concept of uniformity expressed =20
above isn't actually undermined by the above examples of loose =20
coherency. For instance, the TTL for some resource record is (or =20
should be) a commitment by the zone owner that that RR won't change =20
inside the TTL. The window where authoritative servers may be out of =20
sync is small these days and getting smaller. It's more of a =20
theoretical concern than one that people worry about. And in =20
environments where this is considered a significant risk, folk use =20
databases to get immediate replication.

Yes, if someone looks *really* hard they *might* come across examples =20=

of loose consistency. However those transient anomalies will return to =20=

the usual steady state and converge on a consistent name space: think =20=

regression to the mean. That's not the same as violating the principle =20=

of uniformity by handing out different data *by design* to different =20
clients who make the same query.

> Taking the tricks into account, they've been use for over a decade
> now, also evidently without any real problem.

Well in another thread, I've given a couple of examples where stupid =20
DNS tricks cause very real problems. These problems are of course =20
externalities to the people doing those DNS tricks, so they might not =20=

care about those problems or acknowledge their existence.

> Again, the principal of strict uniformity does not appear to matter.

In your opinion. I think the people who are proposing these sorts of =20
DNS changes have the responsibility to prove that the changes cause no =20=

harm and make the engineering trade-offs clear. [ie Is the cost of =20
changing the world's DNS software worth the benefits of the new =20
feature? Are there any second- or third- order effects?] So far there =20=

isn't even a problem statement or any hard data.=


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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Jim Reid <jim@rfc1035.com>
Cc: Colm =?iso-8859-1?Q?MacC=E1rthaigh?= <colm@allcosts.net>, Alfred =?iso-8859-1?Q?H=CEnes?= <ah@tr-sys.de>, namedroppers@ops.ietf.org
Subject: [dnsext] Re: a definition of consistency
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On Fri, Jan 29, 2010 at 09:56:36AM +0000,
 Jim Reid <jim@rfc1035.com> wrote 
 a message of 17 lines which said:

> However there is a higher level consistency that is unwritten (and
> probably needs to be formally documented).

If you try this, I'm afraid you will run into problems similar to the
"reverse DNS" draft-ietf-dnsop-reverse-mapping-considerations:
everyone thought it was simple and it turned out that the so-called
"shared unwritten assumptions" are not shared at all (there was a
reason why they were unwritten...)

> This is the principle of uniformity.  ie No matter where you are or
> what software you use or which server(s) you query, the DNS always
> returns the same answer for the same lookup.

Your definition is incomplete. The real one (RFC 1034, section 2.3) is
more like "No matter where you are or what software you use or which
server(s) you query, the DNS always returns the same answer for the
same lookup, FOR THE DURATION OF $TTL".

So, load-balancers which use a TTL of 0 (something I do not like,
because it defeats caching) are right, protocol-wise. More right than
the good citizens which use a proper TTL (but violate the definition
of consistency).



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Subject: [dnsext] Sending different DNS responses based on perceived proximity
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On Fri, Jan 29, 2010 at 10:12:01AM +0000,
 Jim Reid <jim@rfc1035.com> wrote 
 a message of 19 lines which said:

> Define "most proximate". It is hop count? RTT? Fastest/least
> congested pipe(s)? Quickest or least loaded routers? Most
> stable/reliable route?  Best/cheapest path via the corporate
> firewalls?

There is an IETF Working Group which deals with these questions, ALTO
<http://tools.ietf.org/wg/alto/>. Enrico Marocco already forwarded
them this discussion.

But I do not think this issue is relevant: the IETF does not care
*how* the name server decided to reply 203.0.113.1 or
198.51.100.198. In the same way that RFC 2616 does not say *how* the
Web server decides to 301 redirect and to whom. We should stick with
protocol issues: how to carry information from one machine to another,
not how what the servers decide to reply.


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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Jim Reid <jim@rfc1035.com>
Cc: Colm =?iso-8859-1?Q?MacC=E1rthaigh?= <colm@allcosts.net>, namedroppers@ops.ietf.org
Subject: [dnsext] Re: a definition of consistency
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On Fri, Jan 29, 2010 at 11:43:38AM +0000,
 Jim Reid <jim@rfc1035.com> wrote 
 a message of 65 lines which said:

> I think the people who are proposing these sorts of DNS changes have
> the responsibility to prove that the changes cause no harm

But you are off-topic here: the draft under discussion does not
suggest to change the DNS protocol or to standardize auth. servers
behavior or to mandate an algorithm to load-balancing, it is mostly
about a way to indicate something about the client. There is no reason
for the authors to prove that it affects Security & Stability (except
if the use of unknown EDNS option codes prove to break many
firewalls, which is still a possibility).




From owner-namedroppers@ops.ietf.org  Fri Jan 29 04:12:59 2010
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Date: Fri, 29 Jan 2010 12:05:07 +0000
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Subject: Re: [dnsext] Re: a definition of consistency
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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2010/1/29 Jim Reid <jim@rfc1035.com>:>
> Not really Colm. The higher level concept of uniformity expressed above
> isn't actually undermined by the above examples of loose coherency. For
> instance, the TTL for some resource record is (or should be) a commitment by
> the zone owner that that RR won't change inside the TTL.

If this were the case; then all DNS record changes would have to be
scheduled in advance and authoritative TTLs would decrement in
anticipation of that time. But this is evidently not the case.

>The window where authoritative servers may be out of sync is small these days and getting
> smaller.

Even the root-zone and TLD TTLs are typically two days. But this
raises an interesting question; are DNS tricks ok if the TTL is always
0?

> Yes, if someone looks *really* hard they *might* come across examples of
> loose consistency. However those transient anomalies will return to the
> usual steady state and converge on a consistent name space: think regression
> to the mean. That's not the same as violating the principle of uniformity by
> handing out different data *by design* to different clients who make the
> same query.

My point is that the internet, clients, and all of us have to tolerate
such inconsistency - it's simply a fact of life, even if DNS tricks
did not exist. Holding up strong-consistency as a must-have property
of the DNS is simply at-odds with reality. We don't have it now, and
the internet still works :)

>> Taking the tricks into account, they've been use for over a decade
>> now, also evidently without any real problem.
>
> Well in another thread, I've given a couple of examples where stupid DNS
> tricks cause very real problems. These problems are of course externalities
> to the people doing those DNS tricks, so they might not care about those
> problems or acknowledge their existence.

I saw your complaints about language choice and redirection, but I'm
not sure how this is related to DNS tricks. It seems more like a
consequence of generally poor operations and user-interface design
than related to directional naming. The engineering aim here is to
direct clients to the "best"/"closest"/"whatever" node - the
capabilities of that node are an orthogonal concern.

Interestingly, as the I-D specifies that where the option is set on
incoming queries it should be forwarded, it actually gives users
/more/ power over the problem you cite. A browser/OS could be
configured to specify any IP address it liked, it get the desired
behavior. To me it seems to do more to address the problem than to
cause it anew.

As for operational issues and debugging, yes this a problem - though I
think a marginal one. Practices have evolved for this; many auth DNS
providers provide records that reflect back the resolver IP, for
example, to aid debugging. (e.g. whoami.akamai.net,
whoami.ultradns.net).

>> Again, the principal of strict uniformity does not appear to matter.
>
> In your opinion. I think the people who are proposing these sorts of DNS
> changes have the responsibility to prove that the changes cause no harm and
> make the engineering trade-offs clear. [ie Is the cost of changing the
> world's DNS software worth the benefits of the new feature? Are there any
> second- or third- order effects?] So far there isn't even a problem
> statement or any hard data.

There are problem statements, and some data. More data would be great.
But it still seems like an odd approach. The fact remains that
regardless of the draft, the technique (including ad-hoc client-ip
forwarding arrangements) are already in-use and are not going away.
The question is really "is having an interoperable standard for this
better than the de-facto behaviour of inter-provider arrangements and
exceptions". It is not being proposed in a vacuum as if it this will
be new never-seen-before behaviour. I think that makes our job easier.

-- 
Colm


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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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* Stephane Bortzmeyer:

> 2) A more ambitious one (may be too ambitious), to have an EDNS option
> code "Client info", with sub-codes and various fields (and a registry
> at IANA to register these fields) to carry absolutely everything from
> the desktop client to the authoritative name server. IP address
> information would then be just a special case.

I think this approach would be a lot better.  It's also inherently
opt-in, which seems the best way to side-step privacy issues these
days.

--=20
Florian Weimer                <fweimer@bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstra=DFe 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99


From owner-namedroppers@ops.ietf.org  Fri Jan 29 04:48:26 2010
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Subject: Re: [dnsext] Sending different DNS responses based on perceived proximity
Date: Fri, 29 Jan 2010 12:39:54 +0000
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On 29 Jan 2010, at 11:52, Stephane Bortzmeyer wrote:

> But I do not think this issue is relevant: the IETF does not care
> *how* the name server decided to reply 203.0.113.1 or
> 198.51.100.198. In the same way that RFC 2616 does not say *how* the
> Web server decides to 301 redirect and to whom. We should stick with
> protocol issues: how to carry information from one machine to another,
> not how what the servers decide to reply.

Indeed Stephane. However this discussion began with a draft that  
suggested clients send IP addressing info with their queries. If the  
draft is to go further -- I hope it doesn't -- it will very likely  
attract other cruft. For example hooks for additional data such as hop  
count to help the authoritative server do its trickery. This sort of  
cruft would mean more protocol issues.

Earlier comments about the draft suggested adding other data for  
client identification. So it's not unreasonable to mention other  
metrics for proximity now because of the protocol issues that would be  
needed to accommodate them. ie What sorts of proximity are meant and  
how would they be represented in some sort of EDNS query. What those  
metrics are (or could be) doesn't matter in that context.


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Subject: Re: [dnsext] Re: a definition of consistency
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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Op 29-1-2010 13:20, schreef Florian Weimer:
> * Stephane Bortzmeyer:
> 
>> 2) A more ambitious one (may be too ambitious), to have an EDNS option
>> code "Client info", with sub-codes and various fields (and a registry
>> at IANA to register these fields) to carry absolutely everything from
>> the desktop client to the authoritative name server. IP address
>> information would then be just a special case.
> 
> I think this approach would be a lot better.  It's also inherently
> opt-in, which seems the best way to side-step privacy issues these
> days.
> 

+1

Sounds promising. Especially with opt-in functionality.

iPhone/Andoid with GPS might then indeed take you to the nearest
'pizza.restaurants.local'. Or even better: 'nearest.aed.local' in case
the pizza got stuck in your esophagus or something...

And I can think of a lot of other applications to bring new life to our
beloved friend DNS.

But... DNS-queries are not yet 'protected' with DNSSEC, right? A query
might be modified along the way. Resulting in useless answers...

So I also forsee another interesting 'attack vector'.

-- 
Marco Davids


SIDN | Utrechtseweg 310 | 6812 AR | Postbus 5022 | 6802 EA | ARNHEM
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To: Wilmer van der Gaast <wilmer@google.com>
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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Wilmer van der Gaast wrote on 01/28/2010 12:56:45 AM:

> Hello everyone,
> 
> I spoke to Olafur about this idea in Hiroshima last year. I'm afraid
> the deadline for Anaheim already passed, but we hope we can discuss it
> on-line in the meantime and decide if it should become a WG item in
> Maastricht later this year.
> 
> To summarize the I-D: It specifies an EDNS0 option that carries IP
> address information (by default only the first 24 bits to preserve
> privacy) of the user that triggered a DNS resolution. This should
> allow authoritative nameservers that give geo-targeted responses to be
> more accurate, even in cases where the resolver and its users aren't
> close to each other. To preserve the ability to cache such responses
> efficiently, the option in the response can indicate which exact
> subnet it should be cached for.
> 
> Comments are more than welcome.

I haven't read the whole thread, so maybe this has been proposed before: 
Why not encode the client IP address (32 bits) plus the netmask in cidr 
form (6 bits) in base32 and prefix it to the query.

So, 10.0.0.2/8 would translate to B8AAAQ=I, and the query would then 
simply be: B8AAAQ=I.localized.google.com 

No stub implementation or resolver implementation has to be changed. 
Transient through resolvers as opposed to EDNS. Example works for IPv6 as 
well.

This can simply be done through a redirect on the server side, plus some 
cookie to keep state: 

Client connects to www.google.com over http.
Webserver now knows the clients IP address (10.0.0.2), issues a redirect 
to B8AAAQ.localized.google.com
Client resolves B8AAAQ.localized.google.com
Auth server responds with B8AAAQ.localized.google.com A 10.90.9.73 

There is no netmask in the above example. Instead of the above method, the 
application can set the query prefix to B8AAAQ=I.

The whole discussion about client privacy is a bit over the top, as 
obviously, google can in theory already harvest client IP address by 
looking what connects to their webserver. With the above trick, it could 
even correlate which ip address uses which resolver.

Roy
--=_alternative 0047E04AC12576BA_=
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<br><tt><font size=2>Wilmer van der Gaast wrote on 01/28/2010 12:56:45
AM:<br>
<br>
&gt; Hello everyone,<br>
&gt; <br>
&gt; I spoke to Olafur about this idea in Hiroshima last year. I'm afraid<br>
&gt; the deadline for Anaheim already passed, but we hope we can discuss
it<br>
&gt; on-line in the meantime and decide if it should become a WG item in<br>
&gt; Maastricht later this year.<br>
&gt; <br>
&gt; To summarize the I-D: It specifies an EDNS0 option that carries IP<br>
&gt; address information (by default only the first 24 bits to preserve<br>
&gt; privacy) of the user that triggered a DNS resolution. This should<br>
&gt; allow authoritative nameservers that give geo-targeted responses to
be<br>
&gt; more accurate, even in cases where the resolver and its users aren't<br>
&gt; close to each other. To preserve the ability to cache such responses<br>
&gt; efficiently, the option in the response can indicate which exact<br>
&gt; subnet it should be cached for.<br>
&gt; <br>
&gt; Comments are more than welcome.<br>
</font></tt>
<br><tt><font size=2>I haven't read the whole thread, so maybe this has
been proposed before: Why not encode the client IP address (32 bits) plus
the netmask in cidr form (6 bits) in base32 and prefix it to the query.</font></tt>
<br>
<br><tt><font size=2>So, 10.0.0.2/8 would translate to B8AAAQ=I, and the
query would then simply be: B8AAAQ=I.localized.google.com </font></tt>
<br>
<br><tt><font size=2>No stub implementation or resolver implementation
has to be changed. Transient through resolvers as opposed to EDNS. Example
works for IPv6 as well.</font></tt>
<br>
<br><tt><font size=2>This can simply be done through a redirect on the
server side, plus some cookie to keep state: </font></tt>
<br>
<br><tt><font size=2>Client connects to </font></tt><a href=www.google.com><tt><font size=2>www.google.com</font></tt></a><tt><font size=2>
over http.</font></tt>
<br><tt><font size=2>Webserver now knows the clients IP address (10.0.0.2),
issues a redirect to B8AAAQ.localized.google.com</font></tt>
<br><tt><font size=2>Client resolves B8AAAQ.localized.google.com</font></tt>
<br><tt><font size=2>Auth server responds with B8AAAQ.localized.google.com
A 10.90.9.73 </font></tt>
<br>
<br><tt><font size=2>There is no netmask in the above example. Instead
of the above method, the application can set the query prefix to B8AAAQ=I.</font></tt>
<br>
<br><tt><font size=2>The whole discussion about client privacy is a bit
over the top, as obviously, google can in theory already harvest client
IP address by looking what connects to their webserver. With the above
trick, it could even correlate which ip address uses which resolver.</font></tt>
<br>
<br><tt><font size=2>Roy</font></tt>
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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Colm =?iso-8859-1?Q?MacC=E1rthaigh?= <colm@allcosts.net>
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Subject: [dnsext] Reflection of the resolver's IP address (Was: a definition of consistency
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On Fri, Jan 29, 2010 at 12:05:07PM +0000,
 Colm MacCárthaigh <colm@allcosts.net> wrote 
 a message of 78 lines which said:

> many auth DNS providers provide records that reflect back the
> resolver IP, for example, to aid debugging. (e.g. whoami.akamai.net,
> whoami.ultradns.net).

Is there one which works with IPv6 or at least does not crash? These
two are awfully broken.


% dig AAAA whoami.ultradns.net

; <<>> DiG 9.5.1-P3 <<>> AAAA whoami.ultradns.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 16990
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;whoami.ultradns.net.		IN	AAAA

;; AUTHORITY SECTION:
ultradns.net.		60	IN	SOA	udns1.ultradns.net. domadmin.ultradns.net. 2010012801 900 600 604800 60

;; Query time: 22 msec
;; SERVER: ::1#53(::1)
;; WHEN: Fri Jan 29 14:10:17 2010
;; MSG SIZE  rcvd: 99


% dig A whoami.ultradns.net

; <<>> DiG 9.5.1-P3 <<>> A whoami.ultradns.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58509
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;whoami.ultradns.net.		IN	A

;; ANSWER SECTION:
whoami.ultradns.net.	0	IN	A	192.134.4.69

;; Query time: 17 msec
;; SERVER: ::1#53(::1)
;; WHEN: Fri Jan 29 14:10:29 2010
;; MSG SIZE  rcvd: 64



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To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
Cc: namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: a definition of consistency
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From: Ray.Bellis@nominet.org.uk
Date: Fri, 29 Jan 2010 13:20:05 +0000
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> But you are off-topic here: the draft under discussion does not
> suggest to change the DNS protocol or to standardize auth. servers
> behavior or to mandate an algorithm to load-balancing, it is mostly
> about a way to indicate something about the client. There is no reason
> for the authors to prove that it affects Security & Stability (except
> if the use of unknown EDNS option codes prove to break many
> firewalls, which is still a possibility).

It will certainly cause some home gateway proxies to reject the packets.

In SAC035 we found at least one that FORMERR'ed any EDNS0 option, and 
another that dropped the packets on the floor.

Ray

--=_alternative 00494042802576BA_=
Content-Type: text/html; charset="US-ASCII"

<tt><font size=2><br>
&gt; But you are off-topic here: the draft under discussion does not<br>
&gt; suggest to change the DNS protocol or to standardize auth. servers<br>
&gt; behavior or to mandate an algorithm to load-balancing, it is mostly<br>
&gt; about a way to indicate something about the client. There is no reason<br>
&gt; for the authors to prove that it affects Security &amp; Stability
(except<br>
&gt; if the use of unknown EDNS option codes prove to break many<br>
&gt; firewalls, which is still a possibility).<br>
</font></tt>
<br><tt><font size=2>It will certainly cause some home gateway proxies
to reject the packets.</font></tt>
<br>
<br><tt><font size=2>In SAC035 we found at least one that FORMERR'ed any
EDNS0 option, and another that dropped the packets on the floor.</font></tt>
<br>
<br><tt><font size=2>Ray</font></tt>
<br>
--=_alternative 00494042802576BA_=--


From owner-namedroppers@ops.ietf.org  Fri Jan 29 05:27:31 2010
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To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
Cc: namedroppers <namedroppers@ops.ietf.org>
Subject: [dnsext] Re: Going through broken proxies (Was: a definition of consistency
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From: Ray.Bellis@nominet.org.uk
Date: Fri, 29 Jan 2010 13:25:12 +0000
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> But I agree with George Barwood: we should exercice our freedom to use
> EDNS.

Oh absolutely!  We shouldn't declare EDNS0 a no-go area just because a few 
boxes choose not to support it.

Ray

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<tt><font size=2><br>
&gt; But I agree with George Barwood: we should exercice our freedom to
use<br>
&gt; EDNS.<br>
</font></tt>
<br><tt><font size=2>Oh absolutely! &nbsp;We shouldn't declare EDNS0 a
no-go area just because a few boxes choose not to support it.</font></tt>
<br>
<br><tt><font size=2>Ray</font></tt>
<br>
--=_alternative 0049B851802576BA_=--


From owner-namedroppers@ops.ietf.org  Fri Jan 29 05:31:36 2010
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From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Ray.Bellis@nominet.org.uk
Cc: namedroppers@ops.ietf.org
Subject: [dnsext] Going through broken proxies (Was: a definition of consistency
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On Fri, Jan 29, 2010 at 01:20:05PM +0000,
 Ray.Bellis@nominet.org.uk <Ray.Bellis@nominet.org.uk> wrote 
 a message of 41 lines which said:

> It will certainly cause some home gateway proxies to reject the packets.

Then, this deserves a mention in the draft, with a reference to 5625.

But I agree with George Barwood: we should exercice our freedom to use
EDNS.


From owner-namedroppers@ops.ietf.org  Fri Jan 29 06:41:05 2010
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Subject: Re: [dnsext] Re: a definition of consistency
Date: Fri, 29 Jan 2010 14:34:15 +0000
References: <201001290216.DAA11317@TR-Sys.de> <6f5b6fe71001290132s258b9eb3i1cdbd3e6f4c75f7f@mail.gmail.com> <2F01D84C-6633-499F-B3D3-ACE924AD40DF@rfc1035.com> <6f5b6fe71001290223h77443b7cy21eb884a868daf46@mail.gmail.com> <BB97B845-9302-4D3E-8A4A-5D685CC97099@rfc1035.com> <6f5b6fe71001290405i425107bcge41db790cd94558e@mail.gmail.com>
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On 29 Jan 2010, at 12:05, Colm MacC=E1rthaigh wrote:

> are DNS tricks ok if the TTL is always 0?

Apart from that Mrs. Lincoln, how did you enjoy the play? :-)

DNS tricks are the wrong way to solve CDN problems IMO. Amongst other =20=

things, it's a layering violation. Zero length TTLs might be a less =20
intrusive way of using such trickery. But it still doesn't mean DNS =20
trickery is a good thing.

> We don't have it [consistency] now, and the internet still works :)

Er, no. DNS tricks can take people's browsers to places they shouldn't =20=

go and provide content they didn't want or ask for and sometimes don't =20=

understand. You might say that's not breaking the Internet. I =20
disagree. This sort of broken browser behaviour shouldn't result from =20=

things that happen in the DNS.

> I saw your complaints about language choice and redirection, but I'm
> not sure how this is related to DNS tricks.

Because it's stupid DNS tricks that are responsible for taking my =20
browser to pages in languages I don't understand and didn't ask for.



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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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Hello Wilmer,
 one comment: there is an Anycast RFC now: 4786. It deserves mention IMHO.

 Best -F

Wilmer van der Gaast wrote:
> Hello everyone,
> 
> I spoke to Olafur about this idea in Hiroshima last year. I'm afraid
> the deadline for Anaheim already passed, but we hope we can discuss it
> on-line in the meantime and decide if it should become a WG item in
> Maastricht later this year.
> 
> To summarize the I-D: It specifies an EDNS0 option that carries IP
> address information (by default only the first 24 bits to preserve
> privacy) of the user that triggered a DNS resolution. This should
> allow authoritative nameservers that give geo-targeted responses to be
> more accurate, even in cases where the resolver and its users aren't
> close to each other. To preserve the ability to cache such responses
> efficiently, the option in the response can indicate which exact
> subnet it should be cached for.
> 
> Comments are more than welcome.
> 
> 
> Regards,
> 
> Wilmer van der Gaast
> Carlo Contavalli
> Google
> 
> Sean Leach
> Darryl Rodden
> Neustar/UltraDNS
> 
> 
> From i-d-announce:
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>>
>>
>> 	Title		: Client IP information in DNS requests
>> 	Author(s)	: C. Contavalli, W. van der Gaast, S. Leach, D. Rodden
>> 	Filename	: draft-vandergaast-edns-client-ip-00.txt
>> 	Pages		: 20
>> 	Date		: 2010-1-26
>> 	
>>    This draft defines an EDNS0 extension to allow Authoritative
>>    Nameservers to return varying replies based upon the network address
>>    of the client that initiated the query rather than of the client's
>>    Recursive Resolver.
>>
>> A URL for this Internet-Draft is:
>> http://www.ietf.org/internet-drafts/draft-vandergaast-edns-client-ip-00.txt
> 


-- 
_________________________________________
-- "'Problem' is a bleak word for challenge" - Richard Fish
(Federico L. Lucifredi) - flucifredi@acm.org - GnuPG 0x4A73884C


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Date: Thu, 28 Jan 2010 17:45:17 -0800
To: Joe Abley <jabley@hopcount.ca>, Wilmer van der Gaast <wilmer@google.com>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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At 1:49 PM +1300 1/29/10, Joe Abley wrote:
>On 2010-01-28, at 12:56, Wilmer van der Gaast wrote:
>
>> To summarize the I-D: It specifies an EDNS0 option that carries IP
>> address information (by default only the first 24 bits to preserve
>> privacy) of the user that triggered a DNS resolution.
>
>My initial reading of the proposal suggests that the client that originates the DNS request is the one that MAY populate a client-address option, and that any other resolver or proxy in the chain between the client and a server (cache or authority) which supplies an answer MAY NOT change the client-address option data.
>
>Suppose most clients are numbered using RFC 1918 addresses behind a NAT, and have no trivial way of discovering a non-RFC1918 address that the world might see them as. In that case isn't the address information that ultimately arrives at cache or authority nameservers useless for any purpose other than identifying that RFC 1918 addresses are in use?

Section 4.1 says "An edns-client-ip option MUST never contain a non-public address." To me, that means two things:

- If I'm an end client and I know my address is non-public, I cannot include an edns-client-ip option in my request upstream.

- If I'm a recursive resolver and I get a query that erroneously includes an edns-client-ip option with a non-public address in it, I strip off that option before sending that request upstream.

If I have understood the draft correctly, then the concerns about private addresses their effects on authoritative resolvers are moot.

The biggest stumbling block here is the assumption that developers will know the correct list of non-public addresses. Given lots of deployed counter-examples, that seems like a bad assumption. Specific pointers to specific IANA registries are needed in this draft.

--Paul Hoffman, Director
--VPN Consortium


From owner-namedroppers@ops.ietf.org  Fri Jan 29 07:37:28 2010
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Subject: Re: [dnsext] Re: a definition of consistency
From: =?ISO-8859-1?Q?Colm_MacC=E1rthaigh?= <colm@allcosts.net>
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2010/1/29 Jim Reid <jim@rfc1035.com>:
>> I saw your complaints about language choice and redirection, but I'm
>> not sure how this is related to DNS tricks.
>
> Because it's stupid DNS tricks that are responsible for taking my browser to
> pages in languages I don't understand and didn't ask for.

I really doubt that it is. Do you think it's likely that those page
providers have distinct network end-node destinations on a
per-language basis? For a concrete example; When I query
google.com/nl/ie/co.uk/be/ch and so on, I actually get the same IPv4
result. I'm being directed to my closest node (probably a data-centre
in Dublin, where I also live). I presume the IP is the front-end of
some kind of load-balancer, or the Google web-server. But the language
negotiation is orthogonal, and likely based a combination of
Accept-Lang and Host headers, or possibly a GeoIP lookup on the HTTP
client-ip.

Can you provide one concrete example where incoherent DNS responses
result in being directed to sites that respond in different languages
purely based on the ultimate destination IP address?

-- 
Colm


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> - If I'm a recursive resolver and I get a query that erroneously includes an edns-client-ip option with a non-public address in it, I strip off that option before sending that request upstream.

Given that no recursive resolvers today support this, it's going to 
take a while to get such such behavior implemented, *if* the I-D ends
up as an RFC.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no


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From: Carlo Contavalli <ccontavalli@google.com>
Date: Fri, 29 Jan 2010 16:47:30 +0000
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
To: Olafur Gudmundsson <ogud@ogud.com>
Cc: Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
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Ok, trying to respond to Olafur, and to many of the concerns that have
been raised on this thread.

On Thu, Jan 28, 2010 at 10:06 PM, Olafur Gudmundsson <ogud@ogud.com> wrote:
> In the introduction the term "sub-optimal" is used with out defining
> for who and in what context, traffic delay or content.
The context is traffic delay, not content.

> Just because a
> computer happens to have an IP address that is registered to be in
> Austria does not mean that I'm interested in any Austrian content
> when I visit a news site like Reuters.com.
200% agreed.

> Some people made the not-always-correct assumption that addresses on
> DNS questions are an good/decent/reasonable indicator of location.
I don't disagree. However, it is more than just a few corporations
that are applying this misconception. Even sites like debian.org,
kernel.org or wikipedia are doing this today, and most major web sites
either rely on content providers or are doing similar tricks. Many DNS
softwares either support this directly or though external patches
(powerdns, even bind)..

We don't want to enter the debate of this being a good or bad idea.
People are doing it, regardless of what we think and what the DNS
protocol was meant for, or regardless of other alternatives being
available.

And as people are doing it, owner of recursive resolvers, CDNs, or
anyone who has to deal with a large user base need to take this into
account and work on the assumption that this is what the world looks
like now.

> The proposal in the draft moves almost all the cost of fixing the
> "problem" to the Recursive resolvers. Both by adding the option to the
> queries, and by the onerous requirement to fragment their internal cache
> based on source address of the stub-resolvers.
> This moves the cost of solving the "problem" from the CDN providers to the
> recursive resolvers operators, and I question if that is fair or justified.
So, if you're running a recursive resolver for a few networks that are
topologically close to each other, you probably don't care about this
draft, and will not enable edns-client-ip at all.

If you run an open resolvers, or run a resolver for several,
distributed, networks, chances are that you or your users are already
paying the cost of this.

Either by ignoring the problem and giving your users bad latency in
many cases, or by deploying multiple servers in many different
locations, each one duplicating some of the same entries in the
cache, or by using heuristics to determine what can globally be
cached and what cannot.

This draft, on one side asks recursive resolvers to forward more
information to the authoritative nameservers. But on the other side,
it allows to detect which servers are employing those techniques.
Eg, instead of having heuristics to determine what
can safely be shared in a distributed cache, you can simply look at
the edns-client-ip option. Instead of having to deploy multiple servers
sending queries from different IPs, you now have the choice of using
edns-client-ip to fetch result for different networks.

My point being: if you run a recursive resolver, and care about the
latency of your users, this draft might help you reduce costs and
build better infrastructures. If you run an authoritative name server
that returns different results based on the source ip, you now have
better input data (note: not the best, not exact every time, just
slightly better), can serve better result, and you have a mechanism
to say "yes! I'm pulling dns tricks, please be smart about caching
my data", rather than hope for not-written-anywhere "best practices".

This also helps debugging issues: rather than having to query from
different locations or check what's cached where to determine what's
going on, you can check with the option, or send different options and
verify what's going on directly.

> As Ed Lewis keeps saying "We need problem statements, before proposed
> solutions" and this draft fails to convince me there is a problem that
> is worth the working groups time or the mailing list bandwidth.
Agreed, the discussion would probably be much more focused if we had a
clear problem statement and some numbers to look at. We can't
promise anything at this time, but if we had a slot at the next IETF
meeting or at the following one, we could probably put together a
presentation with some concrete data to look at, and discuss this in
person, which would probably help a lot.

For what is worth, this is an important problem to solve for us, and
for most of the industries we talked to. We also know that in some
cases it's being solved with proprietary or non standard approaches.
We pretty much believe that many would benefit by publishing a
standardized way to handle those cases. (an experimental extension
is fine, or whichever form IETF deems more suitable)

In any case, we've seen lot of useful feedback in this thread, we hope
to upload a -01 version soon.

Carlo


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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, Stephane Bortzmeyer <bortzmeyer@nic.fr>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: a definition of consistency
Date: Fri, 29 Jan 2010 08:43:41 -0800
To: Ray.Bellis@nominet.org.uk
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On Jan 29, 2010, at 5:20 AM, Ray.Bellis@nominet.org.uk wrote:

>=20
> > But you are off-topic here: the draft under discussion does not
> > suggest to change the DNS protocol or to standardize auth. servers
> > behavior or to mandate an algorithm to load-balancing, it is mostly
> > about a way to indicate something about the client. There is no =
reason
> > for the authors to prove that it affects Security & Stability =
(except
> > if the use of unknown EDNS option codes prove to break many
> > firewalls, which is still a possibility).
>=20
> It will certainly cause some home gateway proxies to reject the =
packets.=20
>=20
> In SAC035 we found at least one that FORMERR'ed any EDNS0 option, and =
another that dropped the packets on the floor.=20

This I think is why its clear that only requests containing an EDNS0 =
option should be replied to with the EDNS0 option, so such gateways etc =
either shouldn't be a problem, or should be manageabre by the requestor.

This should be universal for ANY EDNS0 extension.




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From: Carlo Contavalli <ccontavalli@google.com>
Date: Fri, 29 Jan 2010 17:35:15 +0000
Message-ID: <4966825a1001290935v760f26f6r8b236396d988f0de@mail.gmail.com>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Fri, Jan 29, 2010 at 11:32 AM, Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote:
> 1) A small an reasonable one, deleting every mention of the
> load-balancing algorithm and just describing an EDNS option for
> carrying the IP address of the desktop client to the authoritative
> name server (which, being authoritative, could do what it wants with
> it). This would suppress one opportunity to troll and would be in line
> with the general IETF rule "protocol, not policy".
That was the intention :-), we'll try to review the document, and
clean up references to any such algorithm if there's still any.

> 2) A more ambitious one (may be too ambitious), to have an EDNS option
> code "Client info", with sub-codes and various fields (and a registry
> at IANA to register these fields) to carry absolutely everything from
> the desktop client to the authoritative name server. IP address
> information would then be just a special case.

Personally, I'd rather have different EDNS options. Eg, we're now
/trying/ to standardize an option to carry the user ip, there's 16 bit
of space to register other options, it's already possible to register
an option to carry my location, or whatever else I want to carry
there?

So we wouldn't have to create a new register, and we wouldn't have to
nest another header that would look very similar to the enclosing
edns0 header, and we wouldn't have to write more code to parse or
handle those options.

But I don't feel strongly, it's just my 2 cents,
Carlo


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Subject: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
From: Wilmer van der Gaast <wilmer@google.com>
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Let me clarify a few more things.

* Fallback mechanism:
Good idea. In fact I have noticed that not only cheap home routers can
choke on DNS packets with EDNS0 options, even Netscalers (with some
versions + configs at least) can intercept them and return a FORMERR
response.

This isn't so much a problem specific to edns-client-ip, but I agree
we should describe a fallback mechanism in this I-D (and for now in
every I-D describing an EDNS0 option, it seems. :-( )

* RFC1918 IP space, NAT, etc.
Nicholas Weaver's e-mail
<8419C7FF-27E8-47AD-924C-BE42AC75E54E@ICSI.Berkeley.EDU> /
<http://www.ops.ietf.org/lists/namedroppers/namedroppers.2010/msg00105.html>
explains the behaviour we intended perfectly. We'll make sure to make
this behaviour much clearer in -01 since clearly it's currently
lacking.

* DNS/HTTP coming from different IP addresses:
I believe this is not so much related to our draft, or if anything,
our draft will make it possible to solve this problem by letting the
resolver include the external IP address from where HTTP traffic will
exit. If the resolver can't know this information (i.e. if it's not
predictable) then there isn't *any* way for CDNs to fix this problem;
even when using something like a 302 it's entirely possible that
another exit point will be used for the new connection.

* The requirement to include the option in responses only if the
request contained one.
Obviously our intent is to require edns-client-ip options only in
responses to queries that contained one. We'll clarify that in the
doc.

* Allowing to use the option without returning it in the response:
There's one problem with that. Without getting back the option a
caching resolver doesn't know how reusable the response is and will
assume it's suitable for everyone. Allowing that behaviour would allow
one to trick a resolver in Europe to cache the result of
www.example.com for Asia. Although this isn't cache poisoning in the
strictly malicious sense, it's definitely undesirable.

* Making larger netmasks (i.e. lowering the number) optional:
Although I'm not against making this a weak recommendation, doing this
affects not only the auth. resolver with generating more traffic, it
does also increase cache pressure on the resolver. Needs more
discussion.


Regards,

-- 
Wilmer van der Gaast, Dublin Traffic SRE.
Google Ireland.


From owner-namedroppers@ops.ietf.org  Fri Jan 29 11:14:15 2010
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Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Jan 29, 2010, at 10:42 AM, Wilmer van der Gaast wrote:

> Let m* Making larger netmasks (i.e. lowering the number) optional:
> Although I'm not against making this a weak recommendation, doing this
> affects not only the auth. resolver with generating more traffic, it
> does also increase cache pressure on the resolver. Needs more
> discussion.

Actually, it should decrease the cache pressure on the resolver, as it =
allows the authority to say "you can cache this for a larger fraction of =
the users than you asked about".

Depending on the resolver's cache (fixed netmask vs variable netmask, =
and capacity), the resolver may cache it for just the original netmask =
or the larger netmask, depending.




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From owner-namedroppers@ops.ietf.org  Fri Jan 29 12:42:59 2010
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On 2010-01-29, at 14:45, Paul Hoffman wrote:

> Section 4.1 says "An edns-client-ip option MUST never contain a =
non-public address." To me, that means two things:

Ah, I missed that text, thanks.

> The biggest stumbling block here is the assumption that developers =
will know the correct list of non-public addresses. Given lots of =
deployed counter-examples, that seems like a bad assumption. Specific =
pointers to specific IANA registries are needed in this draft.

Yes, it does seem to imply the hard-coding of special values into =
software.

An alternative would be to add the query source as viewed by every =
option-understanding nameserver that receives the query and performs a =
recursive lookup, forget the "non-public" text in 4.1 and let any =
nameserver that whats to process the option make whatever interpretation =
they want. That isolates the need to concern yourself with unique vs. =
non-unique addresses to the point of analysis, not data collection.

I think the general idea of being able to better understand your user =
community would have some operational/diagnostic benefits for any =
authority-only nameserver. No doubt there are also privacy implications.


Joe=


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From dnsext-archive@lists.ietf.org  Fri Jan 29 21:02:27 2010
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Hi, forgot to tell you that I changed my address and phone number - well,<br> I forgot your email, I hope that I write it for you,<br> very lonesome for you, come to my page - leave me your phone number or address in order that would we can continue to correspond!<br><a href="http://mysexrussianfamily.ru/?idAff=127">Click here</a>
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From dnsext-archive@ietf.org  Fri Jan 29 21:02:52 2010
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Hi, forgot to tell you that I changed my address and phone number - well,<br> I forgot your email, I hope that I write it for you,<br> very lonesome for you, come to my page - leave me your phone number or address in order that would we can continue to correspond!<br><a href="http://mysexrussianfamily.ru/?idAff=127">Click here</a>
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From: Tony Finch <dot@dotat.at>
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On Thu, 28 Jan 2010, Alex Bligh wrote:
>
> Why not just allow the end user to specify an arbitrary IP address
> which is the IP address he'd like authoritative nameserver to
> treat as the source address for the query (possibly with a netmask
> to indicate which bits are accurate), rather than saying he MUST
> use the local IP address etc. etc.;

I thought one of the aims of the draft is to avoid specifying changes for
the protocol between stub resolvers and recursive resolvers.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
GERMAN BIGHT HUMBER: SOUTHWEST 5 TO 7. MODERATE OR ROUGH. SQUALLY SHOWERS.
MODERATE OR GOOD.


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References: <7c31c8cc1001271556w4918093er6e94e07cb92c4dc4@mail.gmail.com> <6184.1264657589@nsa.vix.com> <4966825a1001280807i768a33ccs98f809366bce33d8@mail.gmail.com> <48894.1264695230@nsa.vix.com>  <50A91B20-5AC1-4819-91ED-E5141F068D48@wiggum.com>  <52065.1264699087@nsa.vix.com> <FDD5D1103B8EA4D13C4A2C4C@Ximines.local> <EEAAE4BF-BBA9-4141-BECC-A8440715597F@icsi.berkeley.edu> <64E75C1F63E69611DE870231@Ximines.local> <0BA9FFB0-A051-46E6-990D-04F385DA5EF0@ICSI.Berkeley.EDU> <79E447BA4454658934413A0F@nimrod.local> <alpine.LSU.2.00.1001302225580.7217@hermes-2.csi.cam.ac.uk>
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On Jan 30, 2010, at 2:27 PM, Tony Finch wrote:

> On Thu, 28 Jan 2010, Alex Bligh wrote:
>>=20
>> Why not just allow the end user to specify an arbitrary IP address
>> which is the IP address he'd like authoritative nameserver to
>> treat as the source address for the query (possibly with a netmask
>> to indicate which bits are accurate), rather than saying he MUST
>> use the local IP address etc. etc.;
>=20
> I thought one of the aims of the draft is to avoid specifying changes =
for
> the protocol between stub resolvers and recursive resolvers.

Clients shouldn't NEED to specify, but should be ABLE to specify.  =
Likewise, you could have a stub resolver to proxy to recurvise, and that =
proxy may benefit in being the place to add that information.

And as mentioned by others, being able to specify in a query would =
really aid in debugging if nothing else.



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From dnsext-archive@lists.ietf.org  Sun Jan 31 03:59:25 2010
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From owner-namedroppers@ops.ietf.org  Sun Jan 31 12:36:30 2010
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From: bmanning@vacation.karoshi.com
To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
Cc: Alex Bligh <alex@alex.org.uk>, namedroppers@ops.ietf.org
Subject: Re: [dnsext] Privacy in IP address indication (Was: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Fri, Jan 29, 2010 at 12:38:13PM +0100, Stephane Bortzmeyer wrote:
> On Thu, Jan 28, 2010 at 06:10:09PM +0000,
>  Alex Bligh <alex@alex.org.uk> wrote 
>  a message of 64 lines which said:
> 
> > I have read the draft.
> 
> Me too, otherwise I wouldn't comment.
> 
> >  Given people make DNS queries in general so they can communicate
> >  with the (e.g.)  A record given, and the (e.g.) http server on that
> >  IP address can log connections, what privacy is lost by
> >  transmitting the address given in full?
> 
> This would lose a lot of privacy since the IP address of the "desktop"
> client would be transmitted in full, not only to the HTTP server but
> also to middlemen, the authoritative servers of the root, the TLD,
> etc.

	well - it sort of seems unfair to have the client know the
	address(s) of the authoritative server(s), but the authoritative
	servers have no means of knowing the address(s) of the clients.

> 
> The draft has a provision for this (section 4.1) but it is just a MAY
> and does not blend well with the general zone cut rules.
> 
> Also, the HTTP request may be through a proxy, too, so you cannot even
> say that the HTTP server would know the address.
> 
> >  You leave this choice to the recursive resolver, I think, not the
> >  client, and require that at least some bits are cleared.
> 
> The biggest privacy problem with the current draft is that, for the
> "desktop" client, the use of the new extension is opt-out, not opt-in
> (section 8.1) which disturbs me a lot.


	it is a change in legacy behaviours.

--bill


From owner-namedroppers@ops.ietf.org  Sun Jan 31 12:38:27 2010
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From: bmanning@vacation.karoshi.com
To: Paul Vixie <vixie@isc.org>
Cc: Wilmer van der Gaast <wilmer@google.com>, namedroppers@ops.ietf.org
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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On Thu, Jan 28, 2010 at 05:46:29AM +0000, Paul Vixie wrote:
> if we're going to add client identity to the query, can we do so in a more
> general way?  i'd like to know lat-long, country, isp, language, and
> adult/child.  and the ip address should be multiprotocol, covering ipv6.


	many of these requests are for data not visible to the DNS
	directly and may not be visible to the user.

	but since we are asking for the brass ring, I'll add my two
	to the list,  vector and speed

--bill


From owner-namedroppers@ops.ietf.org  Sun Jan 31 16:12:39 2010
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Subject: Re: [dnsext] Privacy in IP address indication (Was: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
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in 8, there is a repetition of the choice (mistake in my opinion) that 
truncating a 32bit address to 24bits provided "privacy".

there are two issues.

first, what data is being collected by the server, independent of any 
assertions of preference by the address provisioning client?

i'm not suggesting that the server should signal the client what its 
data collection practices are, but it is a possibility, this is what 
the w3c's p3p work has made possible, and there is a dcp element (data 
collection policy) in epp.

the mistake made in the p3p spec group was to pick 24bits as providing 
"privacy". this choice was made without reference to the structure of 
any particular address allocation in which an address for which some 
"privacy" was desired, or to the temporal properties of addresses in 
the smallest block to which that address belong.

in short, for the purposes of geo-mumble, a purpose this draft appears 
to share, no use was made of information that may be sufficient to 
identify the geo property sufficient for the proposed service, e.g., 
is this user on mars, for some value of mars, and, there was no 
awareness that dynamically provisioned 32bit identifiers are "static" 
of significant periods of time, and other correlative tools are 
available for user profiling business (and non-business) models which 
have access to "masked" data and other sources of data.

second, there is the utility of the client, the address bits 
provisioning source, asserting what the provisioned bits are.

this draft appears to comingle locality, which may be useful, and the 
frequently repeated "privacy toggle" semantics, which ignores the 
richer semantics of discovering the policy of the address bits 
collector, which should discard these bits as soon as the localized 
service is accomplished, but could keep them indefinitely, and 
corrolate them with other data sources (see "doubleclick" generally).

eric


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From: Elena <dnsext-archive@ietf.org>
To: dnsext-archive@ietf.org
Subject: I came to you, and your number does not answer, Anna.
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Date: Sun, 31 Jan 2010 16:36:47 -0800 (PST)

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Hello sun - you forgot about me already?<br> I want to be with you again, write me or call, come with me to the page - there all my contact details.<br><a href="http://mygoodsex.ru/?idAff=127" target="_blank">Click here</a>
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