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From: "Tobias Gondrom" <tobias.gondrom@gondrom.org>
To: <dots@ietf.org>
Cc: "'Roman Danyliw'" <rdd@cert.org>
Date: Fri, 1 Jun 2018 20:02:09 +0200
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Subject: [Dots] Close of WGLC for Requirements Draft
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Dear DOTS WG team, 

 

Thanks for your discussion and patience. 

As announced a month ago, the WGLC for the requirements document is now
closed. 

 

>From reading through all the emails on the mailing-list it appears to me
that all open issues have been addressed so far. In case I have missed
something, please let me know. 

 

Next step will be for the ID shepherd (Frank XiaLiang was so kind to
volunteer for the work task) and the chairs to prepare a shepherd document
and submit the document to the IESG for LC. 

 

Thanks and best regards, Tobias

 

 

Ps.: over the weekend, I will also review the status for the other WG
documents and come back to you on that beginning of next week. 

 


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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>Dear DOTS WG team, <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Thanks for =
your discussion and patience. <o:p></o:p></p><p class=3DMsoNormal>As =
announced a month ago, the WGLC for the requirements document is now =
closed. <o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>From reading through all the emails on the =
mailing-list it appears to me that all open issues have been addressed =
so far. In case I have missed something, please let me know. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Next step will be for the ID shepherd (Frank XiaLiang =
was so kind to volunteer for the work task) and the chairs to prepare a =
shepherd document and submit the document to the IESG for LC. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thanks and best regards, Tobias<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Ps.: over =
the weekend, I will also review the status for the other WG documents =
and come back to you on that beginning of next week. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>
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From: <mohamed.boucadair@orange.com>
To: Tobias Gondrom <tobias.gondrom@gondrom.org>, "dots@ietf.org" <dots@ietf.org>
CC: 'Roman Danyliw' <rdd@cert.org>
Thread-Topic: [Dots] Close of WGLC for Requirements Draft
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Subject: Re: [Dots] Close of WGLC for Requirements Draft
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Hi Tobias,

Can you please update us about your conclusions with regards to the WGLC of=
 signal channel?

Thank you.

Cheers,
Med

De : Dots [mailto:dots-bounces@ietf.org] De la part de Tobias Gondrom
Envoy=E9 : vendredi 1 juin 2018 20:02
=C0 : dots@ietf.org
Cc : 'Roman Danyliw'
Objet : [Dots] Close of WGLC for Requirements Draft

Dear DOTS WG team,

Thanks for your discussion and patience.
As announced a month ago, the WGLC for the requirements document is now clo=
sed.

>From reading through all the emails on the mailing-list it appears to me th=
at all open issues have been addressed so far. In case I have missed someth=
ing, please let me know.

Next step will be for the ID shepherd (Frank XiaLiang was so kind to volunt=
eer for the work task) and the chairs to prepare a shepherd document and su=
bmit the document to the IESG for LC.

Thanks and best regards, Tobias


Ps.: over the weekend, I will also review the status for the other WG docum=
ents and come back to you on that beginning of next week.


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<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black">Hi Tobias,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black">Can you please update us about =
your conclusions with regards to the WGLC of signal channel?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black">Thank you.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black">Cheers,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black">Med<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
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<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">De&nbsp;:</span></b><span style=3D"fo=
nt-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Dots=
 [mailto:dots-bounces@ietf.org]
<b>De la part de</b> Tobias Gondrom<br>
<b>Envoy=E9&nbsp;:</b> vendredi 1 juin 2018 20:02<br>
<b>=C0&nbsp;:</b> dots@ietf.org<br>
<b>Cc&nbsp;:</b> 'Roman Danyliw'<br>
<b>Objet&nbsp;:</b> [Dots] Close of WGLC for Requirements Draft<o:p></o:p><=
/span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Dear DOTS WG team, <o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks for your discussion and =
patience. <o:p>
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">As announced a month ago, the W=
GLC for the requirements document is now closed.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">From reading through all the em=
ails on the mailing-list it appears to me that all open issues have been ad=
dressed so far. In case I have missed something, please let me know.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Next step will be for the ID sh=
epherd (Frank XiaLiang was so kind to volunteer for the work task) and the =
chairs to prepare a shepherd document and submit the document to the IESG f=
or LC.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks and best regards, Tobias=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Ps.: over the weekend, I will a=
lso review the status for the other WG documents and come back to you on th=
at beginning of next week.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
</div>
</div>
</body>
</html>

--_000_787AE7BB302AE849A7480A190F8B93302DF356BFOPEXCLILMA3corp_--


From nobody Wed Jun 13 13:10:39 2018
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From: "Tobias Gondrom" <tobias.gondrom@gondrom.org>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>
Cc: "'Roman Danyliw'" <rdd@cert.org>
References: <02a601d3f9d2$aa115f70$fe341e50$@gondrom.org> <787AE7BB302AE849A7480A190F8B93302DF356BF@OPEXCLILMA3.corporate.adroot.infra.ftgroup>
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Date: Wed, 13 Jun 2018 22:10:19 +0200
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Subject: Re: [Dots] Close of WGLC for Requirements Draft
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Hi guys,=20

=20

As far as I could see the signal draft WGLC can be closed and the raised
points have been addressed.=20

(one caveat: I am still combing through the some left 10% of the email
threads for the signal draft to check whether I missed something, so if =
I
did, please let me know by raising it=85)=20

=20

As I understand that we had some further implementation works going on =
since
IETF101, I would like to reconfirm the question towards the =
implementation
and hackathon teams whether they found any further deviations or lack of
clarity in the last few weeks since IETF101?=20

If not, then I think we are ready to go. I would appreciate a last =
=93thumbs
up=94 or any raise issues if they encountered any in the last weeks.=20

=20

Thank a lot and best regards, Tobias

=20

=20

From: Dots <dots-bounces@ietf.org> On Behalf Of =
mohamed.boucadair@orange.com
Sent: Wednesday, June 13, 2018 10:15 AM
To: Tobias Gondrom <tobias.gondrom@gondrom.org>; dots@ietf.org
Cc: 'Roman Danyliw' <rdd@cert.org>
Subject: Re: [Dots] Close of WGLC for Requirements Draft

=20

Hi Tobias,=20

=20

Can you please update us about your conclusions with regards to the WGLC =
of
signal channel?=20

=20

Thank you.=20

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Tobias Gondrom
Envoy=E9 : vendredi 1 juin 2018 20:02
=C0 : dots@ietf.org <mailto:dots@ietf.org>=20
Cc : 'Roman Danyliw'
Objet : [Dots] Close of WGLC for Requirements Draft

=20

Dear DOTS WG team,=20

=20

Thanks for your discussion and patience.=20

As announced a month ago, the WGLC for the requirements document is now
closed.=20

=20

>From reading through all the emails on the mailing-list it appears to me
that all open issues have been addressed so far. In case I have missed
something, please let me know.=20

=20

Next step will be for the ID shepherd (Frank XiaLiang was so kind to
volunteer for the work task) and the chairs to prepare a shepherd =
document
and submit the document to the IESG for LC.=20

=20

Thanks and best regards, Tobias

=20

=20

Ps.: over the weekend, I will also review the status for the other WG
documents and come back to you on that beginning of next week.=20

=20


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<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>Hi guys, <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>As far as I =
could see the signal draft WGLC can be closed and the raised points have =
been addressed. <o:p></o:p></p><p class=3DMsoNormal>(one caveat: I am =
still combing through the some left 10% of the email threads for the =
signal draft to check whether I missed something, so if I did, please =
let me know by raising it&#8230;) <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>As I =
understand that we had some further implementation works going on since =
IETF101, I would like to reconfirm the question towards the =
implementation and hackathon teams whether they found any further =
deviations or lack of clarity in the last few weeks since IETF101? =
<o:p></o:p></p><p class=3DMsoNormal>If not, then I think we are ready to =
go. I would appreciate a last &#8220;thumbs up&#8221; or any raise =
issues if they encountered any in the last weeks. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Thank a lot =
and best regards, Tobias<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal> =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Dots =
&lt;dots-bounces@ietf.org&gt; <b>On Behalf Of =
</b>mohamed.boucadair@orange.com<br><b>Sent:</b> Wednesday, June 13, =
2018 10:15 AM<br><b>To:</b> Tobias Gondrom =
&lt;tobias.gondrom@gondrom.org&gt;; dots@ietf.org<br><b>Cc:</b> 'Roman =
Danyliw' &lt;rdd@cert.org&gt;<br><b>Subject:</b> Re: [Dots] Close of =
WGLC for Requirements Draft<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Hi Tobias, <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:black'>Can you =
please update us about your conclusions with regards to the WGLC of =
signal channel? <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:black'>Thank =
you. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif'>De&nbsp;:</spa=
n></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Tobias Gondrom<br><b>Envoy=E9&nbsp;:</b> vendredi 1 =
juin 2018 20:02<br><b>=C0&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Cc&nbsp;:</b> =
'Roman Danyliw'<br><b>Objet&nbsp;:</b> [Dots] Close of WGLC for =
Requirements Draft<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><span lang=3DFR><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal>Dear DOTS WG team, <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Thanks for =
your discussion and patience. <o:p></o:p></p><p class=3DMsoNormal>As =
announced a month ago, the WGLC for the requirements document is now =
closed. <o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>From reading through all the emails on the =
mailing-list it appears to me that all open issues have been addressed =
so far. In case I have missed something, please let me know. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Next step will be for the ID shepherd (Frank XiaLiang =
was so kind to volunteer for the work task) and the chairs to prepare a =
shepherd document and submit the document to the IESG for LC. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thanks and best regards, Tobias<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Ps.: over =
the weekend, I will also review the status for the other WG documents =
and come back to you on that beginning of next week. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
------=_NextPart_000_0305_01D40363.52C736A0--


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From: "Tobias Gondrom" <tobias.gondrom@gondrom.org>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>
Cc: "'Roman Danyliw'" <rdd@cert.org>
Date: Wed, 13 Jun 2018 22:12:33 +0200
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Subject: Re: [Dots] Close of WGLC for Signal Draft
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Apologies, I forgot to change the Subject line before sending.=20

As this pertains to the Signal draft, now with corrected subject line.=20

=20

=20

Hi guys,=20

=20

As far as I could see the signal draft WGLC can be closed and the raised
points have been addressed.=20

(one caveat: I am still combing through the some left 10% of the email
threads for the signal draft to check whether I missed something, so if =
I
did, please let me know by raising it=85)=20

=20

As I understand that we had some further implementation works going on =
since
IETF101, I would like to reconfirm the question towards the =
implementation
and hackathon teams whether they found any further deviations or lack of
clarity in the last few weeks since IETF101?=20

If not, then I think we are ready to go. I would appreciate a last =
=93thumbs
up=94 or any raise issues if they encountered any in the last weeks.=20

=20

Thank a lot and best regards, Tobias

=20

=20

=20

From: Dots <dots-bounces@ietf.org <mailto:dots-bounces@ietf.org> > On =
Behalf
Of mohamed.boucadair@orange.com <mailto:mohamed.boucadair@orange.com>=20
Sent: Wednesday, June 13, 2018 10:15 AM
To: Tobias Gondrom <tobias.gondrom@gondrom.org
<mailto:tobias.gondrom@gondrom.org> >; dots@ietf.org =
<mailto:dots@ietf.org>=20
Cc: 'Roman Danyliw' <rdd@cert.org <mailto:rdd@cert.org> >
Subject: Re: [Dots] Close of WGLC for Requirements Draft

=20

Hi Tobias,=20

=20

Can you please update us about your conclusions with regards to the WGLC =
of
signal channel?=20

=20

Thank you.=20

=20

Cheers,

Med

=20

De : Dots [mailto:dots-bounces@ietf.org] De la part de Tobias Gondrom
Envoy=E9 : vendredi 1 juin 2018 20:02
=C0 : dots@ietf.org <mailto:dots@ietf.org>=20
Cc : 'Roman Danyliw'
Objet : [Dots] Close of WGLC for Requirements Draft

=20

Dear DOTS WG team,=20

=20

Thanks for your discussion and patience.=20

As announced a month ago, the WGLC for the requirements document is now
closed.=20

=20

>From reading through all the emails on the mailing-list it appears to me
that all open issues have been addressed so far. In case I have missed
something, please let me know.=20

=20

Next step will be for the ID shepherd (Frank XiaLiang was so kind to
volunteer for the work task) and the chairs to prepare a shepherd =
document
and submit the document to the IESG for LC.=20

=20

Thanks and best regards, Tobias

=20

=20

Ps.: over the weekend, I will also review the status for the other WG
documents and come back to you on that beginning of next week.=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>Apologies, I forgot to change the Subject line before =
sending. <o:p></o:p></p><p class=3DMsoNormal>As this pertains to the =
Signal draft, now with corrected subject line. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Hi guys, =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>As far as I could see the signal draft WGLC can be =
closed and the raised points have been addressed. <o:p></o:p></p><p =
class=3DMsoNormal>(one caveat: I am still combing through the some left =
10% of the email threads for the signal draft to check whether I missed =
something, so if I did, please let me know by raising it&#8230;) =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>As I understand that we had some further =
implementation works going on since IETF101, I would like to reconfirm =
the question towards the implementation and hackathon teams whether they =
found any further deviations or lack of clarity in the last few weeks =
since IETF101? <o:p></o:p></p><p class=3DMsoNormal>If not, then I think =
we are ready to go. I would appreciate a last &#8220;thumbs up&#8221; or =
any raise issues if they encountered any in the last weeks. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thank a lot and best regards, Tobias<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Dots &lt;<a =
href=3D"mailto:dots-bounces@ietf.org">dots-bounces@ietf.org</a>&gt; =
<b>On Behalf Of </b><a =
href=3D"mailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com=
</a><br><b>Sent:</b> Wednesday, June 13, 2018 10:15 AM<br><b>To:</b> =
Tobias Gondrom &lt;<a =
href=3D"mailto:tobias.gondrom@gondrom.org">tobias.gondrom@gondrom.org</a>=
&gt;; <a href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Cc:</b> =
'Roman Danyliw' &lt;<a =
href=3D"mailto:rdd@cert.org">rdd@cert.org</a>&gt;<br><b>Subject:</b> Re: =
[Dots] Close of WGLC for Requirements Draft<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
lang=3DFR style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Hi Tobias, <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:black'>Can you =
please update us about your conclusions with regards to the WGLC of =
signal channel? <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier New";color:black'>Thank =
you. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif'>De&nbsp;:</spa=
n></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif'> Dots [<a =
href=3D"mailto:dots-bounces@ietf.org">mailto:dots-bounces@ietf.org</a>] =
<b>De la part de</b> Tobias Gondrom<br><b>Envoy=E9&nbsp;:</b> vendredi 1 =
juin 2018 20:02<br><b>=C0&nbsp;:</b> <a =
href=3D"mailto:dots@ietf.org">dots@ietf.org</a><br><b>Cc&nbsp;:</b> =
'Roman Danyliw'<br><b>Objet&nbsp;:</b> [Dots] Close of WGLC for =
Requirements Draft<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><span lang=3DFR><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal>Dear DOTS WG team, <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Thanks for =
your discussion and patience. <o:p></o:p></p><p class=3DMsoNormal>As =
announced a month ago, the WGLC for the requirements document is now =
closed. <o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>From reading through all the emails on the =
mailing-list it appears to me that all open issues have been addressed =
so far. In case I have missed something, please let me know. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Next step will be for the ID shepherd (Frank XiaLiang =
was so kind to volunteer for the work task) and the chairs to prepare a =
shepherd document and submit the document to the IESG for LC. =
<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thanks and best regards, Tobias<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Ps.: over =
the weekend, I will also review the status for the other WG documents =
and come back to you on that beginning of next week. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></body></html>
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From: "Tobias Gondrom" <tobias.gondrom@gondrom.org>
To: <dots@ietf.org>
Cc: "'Roman Danyliw'" <rdd@cert.org>
Date: Wed, 13 Jun 2018 22:20:11 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/6yFwxwKU02qTMsDuykQ-4Pc81kQ>
Subject: [Dots] WGLC for use cases draft - until July-1.
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Dear all, 

 

Looking at the latest version of the use cases draft and following the
discussions we had at IETF101, I hereby start the WG Last call. 

I am a bit wary that we did not have too many reviews of the last version
yet, even though it had some more changes. However, at this point I think we
can start the WG LC and request all final comments now. 

 

https://www.ietf.org/id/draft-ietf-dots-use-cases-12.txt

 

Given the current open work pipeline, the WGLC for the use cases draft will
run for 2 weeks, until July-1. 

 

Please raise all open questions now so we can move on to IESG LC soon after.

 

Thank you and best regards, Tobias (co-chair DOTS hat on)

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>Dear all, <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Looking at =
the latest version of the use cases draft and following the discussions =
we had at IETF101, I hereby start the WG Last call. <o:p></o:p></p><p =
class=3DMsoNormal>I am a bit wary that we did not have too many reviews =
of the last version yet, even though it had some more changes. However, =
at this point I think we can <b>start the WG LC and request all final =
comments now</b>. <o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><a =
href=3D"https://www.ietf.org/id/draft-ietf-dots-use-cases-12.txt">https:/=
/www.ietf.org/id/draft-ietf-dots-use-cases-12.txt</a><o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><b>Given the =
current open work pipeline, the WGLC for the use cases draft will run =
for 2 weeks, until July-1. <o:p></o:p></b></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Please raise =
all open questions now so we can move on to IESG LC soon =
after&#8230;<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thank you and best regards, Tobias (co-chair DOTS hat =
on)<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>
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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Wed, 13 Jun 2018 20:19:17 -0400
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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Hi,

Though we had some feed backs and I am pretty confident about the current
version, I second Tobias and strongly encourage the WG to review the
document. You can raise issue or state you agree with the document - it is
an easy one to review ;-)

Thanks in advance !

Yours,
Daniel

On Wed, Jun 13, 2018 at 4:20 PM, Tobias Gondrom <tobias.gondrom@gondrom.org=
>
wrote:

> Dear all,
>
>
>
> Looking at the latest version of the use cases draft and following the
> discussions we had at IETF101, I hereby start the WG Last call.
>
> I am a bit wary that we did not have too many reviews of the last version
> yet, even though it had some more changes. However, at this point I think
> we can *start the WG LC and request all final comments now*.
>
>
>
> https://www.ietf.org/id/draft-ietf-dots-use-cases-12.txt
>
>
>
> *Given the current open work pipeline, the WGLC for the use cases draft
> will run for 2 weeks, until July-1. *
>
>
>
> Please raise all open questions now so we can move on to IESG LC soon
> after=E2=80=A6
>
>
>
> Thank you and best regards, Tobias (co-chair DOTS hat on)
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>

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<div dir=3D"ltr"><div>Hi, <br></div><div><br></div><div>Though we had some =
feed backs and I am pretty confident about the current version, I second To=
bias and strongly encourage the WG to review the document. You can raise is=
sue or state you agree with the document - it is an easy one to review ;-) =
<br></div><div><br></div><div>Thanks in advance !</div><div><br></div><div>=
Yours, <br></div><div>Daniel<br> </div></div><div class=3D"gmail_extra"><br=
><div class=3D"gmail_quote">On Wed, Jun 13, 2018 at 4:20 PM, Tobias Gondrom=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:tobias.gondrom@gondrom.org" target=
=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><div link=3D"#0563C1" vlink=3D"#954F72" lang=3D"EN-US">=
<div class=3D"m_268115930605284188WordSection1"><p class=3D"MsoNormal">Dear=
 all, <u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p c=
lass=3D"MsoNormal">Looking at the latest version of the use cases draft and=
 following the discussions we had at IETF101, I hereby start the WG Last ca=
ll. <u></u><u></u></p><p class=3D"MsoNormal">I am a bit wary that we did no=
t have too many reviews of the last version yet, even though it had some mo=
re changes. However, at this point I think we can <b>start the WG LC and re=
quest all final comments now</b>. <u></u><u></u></p><p class=3D"MsoNormal">=
<u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><a href=3D"https://www.ietf.=
org/id/draft-ietf-dots-use-cases-12.txt" target=3D"_blank">https://www.ietf=
.org/id/draft-<wbr>ietf-dots-use-cases-12.txt</a><u></u><u></u></p><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><b>Given the =
current open work pipeline, the WGLC for the use cases draft will run for 2=
 weeks, until July-1. <u></u><u></u></b></p><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><p class=3D"MsoNormal">Please raise all open questions now=
 so we can move on to IESG LC soon after=E2=80=A6<u></u><u></u></p><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Thank you and=
 best regards, Tobias (co-chair DOTS hat on)<u></u><u></u></p><p class=3D"M=
soNormal"><u></u>=C2=A0<u></u></p></div></div><br>_________________________=
_____<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dots</a><br>
<br></blockquote></div><br></div>

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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Tobias Gondrom" <tobias.gondrom@gondrom.org>, "dots@ietf.org" <dots@ietf.org>
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Thread-Topic: [Dots] Close of WGLC for Requirements Draft
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Tobias Gondrom" <tobias.gondrom@gondrom.org>, "dots@ietf.org" <dots@ietf.org>
CC: 'Roman Danyliw' <rdd@cert.org>
Thread-Topic: [Dots] Close of WGLC for Requirements Draft
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/q6czvYHdhhWFwvMJHgnvOMWNnow>
Subject: Re: [Dots] Close of WGLC for Requirements Draft
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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From: Artyom Gavrichenkov <ximaera@gmail.com>
Date: Tue, 19 Jun 2018 16:49:58 +0300
Message-ID: <CALZ3u+ZmrTbDRXKQG9+q5ZppRcp96O1yhbfpLGmWJP02xR+YCg@mail.gmail.com>
To: TirumaleswarReddy_Konda@mcafee.com
Cc: daniel.migault@ericsson.com, tobias.gondrom@gondrom.org, rdd@cert.org,  dots <dots@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/E9Hruad8HeetbWrJwQ_MEeVaprY>
Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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Good day,

Comments inline,

On Tue, Jun 19, 2018 at 4:12 PM Konda, Tirumaleswar Reddy
<TirumaleswarReddy_Konda@mcafee.com> wrote:
> 2)
> Comment> In the above line, I don't get "that it has received a DOTS DDoS Mitigation termination request from a downstream Enterprise Network or DDoS Mitigation Service Provider".
> I think you mean "or notified by the DDoS Mitigation Service Provider that the DDoS attack has stopped"

This is the case of DOTS Gateway [I-D.ietf-dots-architecture-06,
2.2.3], when a downstream DOTS client sends a termination request to
the gateway.

| Artyom Gavrichenkov
| gpg: 2deb 97b1 0a3c 151d b67f 1ee5 00e7 94bc 4d08 9191
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From nobody Tue Jun 19 17:31:56 2018
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To: Tobias Gondrom <tobias.gondrom@gondrom.org>, mohamed.boucadair@orange.com, dots@ietf.org
Cc: 'Roman Danyliw' <rdd@cert.org>
References: <031b01d40352$dddbfb10$9993f130$@gondrom.org>
From: kaname nishizuka <kaname@nttv6.jp>
Message-ID: <7799165e-903e-dcdf-fc38-dcd118f92c29@nttv6.jp>
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Subject: Re: [Dots] Close of WGLC for Signal Draft
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Hi WG members,


 > As I understand that we had some further implementation works going on since IETF101, I would like to reconfirm the question towards the implementation and hackathon teams whether they found any further deviations or lack of clarity in the last few weeks since IETF101?
 > If not, then I think we are ready to go. I would appreciate a last “thumbs up” or any raise issues if they encountered any in the last weeks.

So far, issues found are raised on the mailing list.

As an implementation status update, the latest code is available on https://github.com/nttdots/go-dots
  * it reflects changes by -18
  * it is now using libcoap (excluded old dependencies)
  * install guide is renewed (Dockerfile is also provided)

I'm planning to do further interop testing with NCCGroup's based on -20 draft.
Data-channel interop testing is also planned at the next hackathon in IETF102.

regards,
Kaname

On 2018/06/14 5:12, Tobias Gondrom wrote:
>
> Apologies, I forgot to change the Subject line before sending.
>
> As this pertains to the Signal draft, now with corrected subject line.
>
> Hi guys,
>
> As far as I could see the signal draft WGLC can be closed and the raised points have been addressed.
>
> (one caveat: I am still combing through the some left 10% of the email threads for the signal draft to check whether I missed something, so if I did, please let me know by raising it…)
>
> As I understand that we had some further implementation works going on since IETF101, I would like to reconfirm the question towards the implementation and hackathon teams whether they found any further deviations or lack of clarity in the last few weeks since IETF101?
>
> If not, then I think we are ready to go. I would appreciate a last “thumbs up” or any raise issues if they encountered any in the last weeks.
>
> Thank a lot and best regards, Tobias
>
> *From:* Dots <dots-bounces@ietf.org <mailto:dots-bounces@ietf.org>> *On Behalf Of *mohamed.boucadair@orange.com <mailto:mohamed.boucadair@orange.com>
> *Sent:* Wednesday, June 13, 2018 10:15 AM
> *To:* Tobias Gondrom <tobias.gondrom@gondrom.org <mailto:tobias.gondrom@gondrom.org>>; dots@ietf.org <mailto:dots@ietf.org>
> *Cc:* 'Roman Danyliw' <rdd@cert.org <mailto:rdd@cert.org>>
> *Subject:* Re: [Dots] Close of WGLC for Requirements Draft
>
> Hi Tobias,
>
> Can you please update us about your conclusions with regards to the WGLC of signal channel?
>
> Thank you.
>
> Cheers,
>
> Med
>
> *De :*Dots [mailto:dots-bounces@ietf.org] *De la part de* Tobias Gondrom
> *Envoyé :* vendredi 1 juin 2018 20:02
> *À :* dots@ietf.org <mailto:dots@ietf.org>
> *Cc :* 'Roman Danyliw'
> *Objet :* [Dots] Close of WGLC for Requirements Draft
>
> Dear DOTS WG team,
>
> Thanks for your discussion and patience.
>
> As announced a month ago, the WGLC for the requirements document is now closed.
>
> From reading through all the emails on the mailing-list it appears to me that all open issues have been addressed so far. In case I have missed something, please let me know.
>
> Next step will be for the ID shepherd (Frank XiaLiang was so kind to volunteer for the work task) and the chairs to prepare a shepherd document and submit the document to the IESG for LC.
>
> Thanks and best regards, Tobias
>
> Ps.: over the weekend, I will also review the status for the other WG documents and come back to you on that beginning of next week.
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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    Hi WG members,<br>
    <br>
    <br>
    &gt; As I understand that we had some further implementation works
    going on since IETF101, I would like to reconfirm the question
    towards the implementation and hackathon teams whether they found
    any further deviations or lack of clarity in the last few weeks
    since IETF101?<br>
    &gt; If not, then I think we are ready to go. I would appreciate a
    last “thumbs up” or any raise issues if they encountered any in the
    last weeks.<br>
    <br>
    So far, issues found are raised on the mailing list.<br>
    <br>
    As an implementation status update, the latest code is available on
    <a class="moz-txt-link-freetext" href="https://github.com/nttdots/go-dots">https://github.com/nttdots/go-dots</a><br>
     * it reflects changes by -18 <br>
     * it is now using libcoap (excluded old dependencies)<br>
     * install guide is renewed (Dockerfile is also provided)<br>
    <br>
    I'm planning to do further interop testing with NCCGroup's based on
    -20 draft.<br>
    Data-channel interop testing is also planned at the next hackathon
    in IETF102.<br>
    <br>
    regards,<br>
    Kaname<br>
    <br>
    <div class="moz-cite-prefix">On 2018/06/14 5:12, Tobias Gondrom
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:031b01d40352$dddbfb10$9993f130$@gondrom.org">
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        <p class="MsoNormal">Apologies, I forgot to change the Subject
          line before sending. <o:p></o:p></p>
        <p class="MsoNormal">As this pertains to the Signal draft, now
          with corrected subject line. <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Hi guys, <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">As far as I could see the signal draft WGLC
          can be closed and the raised points have been addressed. <o:p></o:p></p>
        <p class="MsoNormal">(one caveat: I am still combing through the
          some left 10% of the email threads for the signal draft to
          check whether I missed something, so if I did, please let me
          know by raising it…) <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">As I understand that we had some further
          implementation works going on since IETF101, I would like to
          reconfirm the question towards the implementation and
          hackathon teams whether they found any further deviations or
          lack of clarity in the last few weeks since IETF101? <o:p></o:p></p>
        <p class="MsoNormal">If not, then I think we are ready to go. I
          would appreciate a last “thumbs up” or any raise issues if
          they encountered any in the last weeks. <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Thank a lot and best regards, Tobias<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
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            <p class="MsoNormal"><b>From:</b> Dots &lt;<a
                href="mailto:dots-bounces@ietf.org"
                moz-do-not-send="true">dots-bounces@ietf.org</a>&gt; <b>On
                Behalf Of </b><a
                href="mailto:mohamed.boucadair@orange.com"
                moz-do-not-send="true">mohamed.boucadair@orange.com</a><br>
              <b>Sent:</b> Wednesday, June 13, 2018 10:15 AM<br>
              <b>To:</b> Tobias Gondrom &lt;<a
                href="mailto:tobias.gondrom@gondrom.org"
                moz-do-not-send="true">tobias.gondrom@gondrom.org</a>&gt;;
              <a href="mailto:dots@ietf.org" moz-do-not-send="true">dots@ietf.org</a><br>
              <b>Cc:</b> 'Roman Danyliw' &lt;<a
                href="mailto:rdd@cert.org" moz-do-not-send="true">rdd@cert.org</a>&gt;<br>
              <b>Subject:</b> Re: [Dots] Close of WGLC for Requirements
              Draft<o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black" lang="FR">Hi Tobias, <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black" lang="FR"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black">Can you please update us about your
            conclusions with regards to the WGLC of signal channel? <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black">Thank you. <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black">Cheers,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black">Med<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Courier
            New&quot;;color:black"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span
                    style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"
                    lang="FR">De :</span></b><span
                  style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif"
                  lang="FR"> Dots [<a
                    href="mailto:dots-bounces@ietf.org"
                    moz-do-not-send="true">mailto:dots-bounces@ietf.org</a>]
                  <b>De la part de</b> Tobias Gondrom<br>
                  <b>Envoyé :</b> vendredi 1 juin 2018 20:02<br>
                  <b>À :</b> <a href="mailto:dots@ietf.org"
                    moz-do-not-send="true">dots@ietf.org</a><br>
                  <b>Cc :</b> 'Roman Danyliw'<br>
                  <b>Objet :</b> [Dots] Close of WGLC for Requirements
                  Draft<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
          <p class="MsoNormal">Dear DOTS WG team, <o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Thanks for your discussion and patience.
            <o:p></o:p></p>
          <p class="MsoNormal">As announced a month ago, the WGLC for
            the requirements document is now closed. <o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">From reading through all the emails on
            the mailing-list it appears to me that all open issues have
            been addressed so far. In case I have missed something,
            please let me know. <o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Next step will be for the ID shepherd
            (Frank XiaLiang was so kind to volunteer for the work task)
            and the chairs to prepare a shepherd document and submit the
            document to the IESG for LC. <o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Thanks and best regards, Tobias<o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Ps.: over the weekend, I will also review
            the status for the other WG documents and come back to you
            on that beginning of next week. <o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
        </div>
      </div>
      <!--'"--><br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
Dots mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Dots@ietf.org">Dots@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/dots">https://www.ietf.org/mailman/listinfo/dots</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

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Hi Tiru,

Thanks for the comments. Please see inline my responses. If the proposed
text is fine to youI will update the draft and publish a new version by the
end of the week.

Yours,
Daniel

On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Daniel,
>
> My comments and nits
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>

> Comment>  If the DMS in the enterprise network is not capable of detecting
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to detect
> and mitigate the outgoing DDoS attack ?
>
> <mglt>

While writing the use case the example I had in mind was that the ITP could
signal the network enterprise that some hosts are being infected and
belonging to a botnet. The ITP could provide a list of suspicious tagged
IPv6 or the indication that hosts are suspected to belong to a specific
botnet.
The network enterprise may then take the necessary action, monitoring
specific DNS requests, running specific scans over its hosts... At least
this what I had in mind. The specific signaling should be defined by DOTS.
Do you think the text should be updated as below ?


OLD:
[...] The enterprise network is then responsible to
   perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
   delegated back to the upstream ITP, as described in this section.

NEW:
[...] The enterprise network is then responsible to
   perform the DDoS Mitigation.  Typically, the ITP could provide a list of
suspicious hosts with some additional information related the detected
attacks such as DDoS, Botnet, .... According to the type of attack, the
enterprise is likely to apply specific security policies which could
include security checks, updates on the tagged hosts as well as
instantiating specific monitoring traffic elements such as certain type of
DNS queries, traffic of specific destination...  In some case the DDoS
Mitigation may be
   delegated back to the upstream ITP, as described in this section.

</mglt>


> 2)
>    Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> In the above line, I don't get "that it has received a DOTS DDoS
> Mitigation termination request from a downstream Enterprise Network or DDoS
> Mitigation Service Provider".
> I think you mean "or notified by the DDoS Mitigation Service Provider that
> the DDoS attack has stopped"
>
>
<mglt>
The text attempt to provide reasons for a DOTS Client to send a DOTS DDoS
Mitigation termination request. It could be that a) information received
from the upstream DMS indicates the attacks has been stopped or that the
attack is sufficiently low so that it can handle the attack on its own. On
the other hand, in the case of collaboration between DMS, a DMS may end the
collaboration with an upstream DMS because the downstream DMS has requested
so. I propose the follwoing clarification, please let me know if that is
fine with you:


OLD:
Once the requesting Enterprise Network is confident that the DDoS
   attack has either ceased or has fallen to levels of traffic/
   complexity which they can handle on their own or that it has received
   a DOTS DDoS Mitigation termination request from a downstream
   Enterprise Network or DDoS Mitigation Service Provider, the
   requesting Enterprise Network DOTS client sends a DOTS DDoS
   Mitigation termination request to the DDoS Mitigation Service
   Provider.

NEW:
Once the requesting Enterprise Network has been notified by the DDoS
Mitigation Service
   Provider. the attack has been stopped, or that the level of the attack
has fallen to levels of traffic/
   complexity which they can handle on their own, the Enterprise Network
may notify the DDoS Mitigation Service Provider to stop the DDoS
Mitigation. Similarly, when DDoS Mitigation Service
   Providers are collaborating, a DDoS Mitigation Service Provider may
relay the request for terminating a DDoS MItigation to the upstream DoS
Mitigation Service Provider upon request from a downstream  DoS Mitigation
Service Provider. In any case the termination of a DDoS Mitigation is
requested by the Network Enterprise DOTS client sending a DOTS DDoS
Mitigation termination request to the DDoS Mitigation Service Provider.

</mglt>

3)
>
>    The pre-arrangement typically includes the agreement on the
>    mechanisms used to redirect the traffic to the DDoS Mitigation
>    Service Provider, as well as the mechanism to to re-inject the
>
>  >>>>>>>>>>>>>>>>>>>>>>>>>>> Remove "to"
>
> <mglt>
Done
</mglt>

4)
>
>    o  DDoS Mitigation Service: designates a DDoS service provided to a
>       customer and which is scoped to mitigate DDoS attacks.  Services
>       usually involve Service Level Agreement (SLA) that have to be met.
>       It is the responsibility of the service provider to instantiate
>       the DDoS Mitigation System to meet these SLAs.
>
>    o  DDoS Mitigation System (DMS): A system that performs DDoS
>       mitigation.  The DDoS Mitigation System may be composed by a
>       cluster of hardware and/or software resources, but could also
>       involve an orchestrator that may take decisions such as
>       outsourcing partial or more of the mitigation to another DDoS
>       Mitigation System.
>
> Nit> For better readability you may want to define "DMS" followed by "DDoS
> Mitigation Service"
>

<mglt>
Done
</mglt>

>
> 5)
>    DOTS is at risk from three primary attacks: DOTS agent impersonation,
>    traffic injection, and signaling blocking.  The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> Comment> A MITM attacker can drop all the DOTS signal channel traffic,
> designing the DOTS signal channel protocol for minimal data
> transfer will not address the MITM attack.
>

<mglt>
 Agree. I propose to remove:
"""
The DOTS protocol must be
   designed for minimal data transfer to address the blocking risk.
"""
</mglt>

>
> 6)
>    One consideration could be to minimize the security technologies in use
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> Comment> The DOTS signal and data channels are using TLS for mutual
> authentication, confidentiality and data integrity. I don't see the need
> for the above lines.
>
> <mglt>
Agree.  I propose to remove the following lines:
"""
 One consideration could be to minimize the security technologies in use at
any one
   time.  The more needed, the greater the risk of failures coming from
   assumptions on one technology providing protection that it does not
   in the presence of another technology.
"""

</mglt>

> 7)
>    When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
> Comment> I think you mean the DDoS attack has stopped. You may want to
> rephrase the line.
>

<mglt>
I propose the following text:

OLD:
When the DDoS mitigation is finished on the DMS, the orchestrator
   indicates to the telemetry systems as well as to the network
   administrator the DDoS mitigation is finished.

NEW:
When the DDoS attack has stopped, the orchestrator
   indicates to the telemetry systems as well as to the network
   administrator the end of the DDoS Mitigation.
</mglt>


> 8)
>    Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
> Comment> You may want to clarify the DOTS client will later be notified
> that the DDoS mitigation is effective.
>

<mglt>
I propose the following text:

OLD:
Upon receiving the DOTS request for DDoS mitigation from the network
   administrator, the orchestrator coordinates the DDoS mitigation
   according to a specified strategy.  Its status indicates the DDoS
   mitigation is starting while not effective.

NEW:
Upon receiving the DOTS request for DDoS mitigation from the network
   administrator, the orchestrator coordinates the DDoS Mitigation
   according to a specified strategy.  Its status indicates the DDoS
   Mitigation is starting while not effective. The DOTS client of the
orchestrator will later be notified that the DDoS Mitigation is effective.


</mglt>

>
> 9) If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
> Nit> The above line is not clear, who are "they" in the above line ?
>
> <mglt>
I propose the followin text:

OLD:
If the network administrator decides to start the
   mitigation, they order through her web interface a DOTS client to
   send a request for DDoS mitigation.

NEW:
If the network administrator decides to start the
   mitigation, the network administrator orders through her web interface a
DOTS client to
   send a request for DDoS mitigation.
</mglt>


> 10) This request is expected to be associated with a context that
> identifies the DDoS mitigation selected.
>
> Comment> I don't understand the context of the above line.
>

<mg;t>
The context constitutes of elements, indications that provides sufficient
information to the orchestrator to know what needs to be done. in other
words, the DDoS Mitigation.
I propose the following text:

OLD:
This request is expected to be associated with a context that identifies
the DDoS mitigation selected.

NEW:
This request is expected to be associated with a context that identifies or
provide sufficient information to the orchestrator to in fer the DDoS
Mitigation to elaborate and coordinate.

</mglt>


>
> 11)   Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.
>
> Comment> What is the specified strategy (you may want to give an example) ?
>
<mglt>
I propose to add the follwoing text, but I am happy if you are willing to
provide a more specific example.

NEW:
Upon receiving a request to mitigate a DDoS attack performed over a target,
the orchestrator, may evaluate the volumetry of the attack as well as the
value that represent the target. Then it may also request an upstream DMS
Provider to filter the traffic while moving the target to another network
so new sessions will not be impacted.

</mglt>


>
> 12)
> The status of the DDoS mitigation indicates the orchestrator is in an
> analyzing phase.
>


> Comment> DOTS signal channel draft does not indicate the mitigation status
> is in analyzing phase (Please see "Table 2: Values of 'status' Parameter"
> in the draft).
>
> <mglt>
I propose to remove:

"""
The status of the DDoS
mitigation indicates the orchestrator is in an analyzing phase.
"""
</mglt>

13)
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
> Comment> The orchestrator would anyway be collecting data from various
> telemetry systems for correlation.
>
> <mglt>
Agree. I think what I wanted to say that we may move to a state where finer
information is being monitored. I porposed the follwoing text:

OLD:
The orchestrator begins collecting various information from various
telemetry systems in order to correlate the measurements and provide  an
analysis of the event.

NEW:
The orchestrator may begin collecting additional fined grain and specific
information from various  telemetry systems in order to correlate the
measurements and provide an analysis of the event.

</mglt>

14) These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
> Comment> what do you mean by "some measurement indicators" and "specific
> reporting" (looks vague to me) ?
>
> <mglt>

measurement indicators means to me, some variables that we believe
representative for threat detection, this typically involved the traffic
load, the number of SYNs...Specific reporting here indicates what the DOTS
client refers to while triggering teh DDoS Mitigation request. I propose
teh follwointext:

OLD:
These systems are configured so that when an
   event or some measurement indicators reach a predefined level to
   report a DOTS mitigation request to the orchestrator.  The DOTS
   mitigation request may be associated with some element such as
   specific reporting.

NEW:
These systems are configured so that when an
   event or some measurement indicators reach a predefined level to
  send DOTS mitigation request to the orchestrator.  The DOTS
   mitigation request may be associated with additional information to let
the orchestrator know what has triggered the request. .

</mglt>

15) Figure 4 (DDoS Orchestration) includes both internal and external DDoS
> mitigation systems, but the usage of internal and external DDoS mitigation
> systems in
>        not discussed in section 3.3.
>
> <mglt>
I propose the following change in teh beginign of teh section:

OLD:
In this use case, one or more DDoS telemetry systems or monitoring
devices monitor a network - typically an ISP network.

NEW:
In this use case, one or more DDoS telemetry systems or monitoring
devices spread over one or multiple administrative domains provides health
indicator of the network traffic to the orchestrator

I also propose to indicate on the figure ( orchetsrator adinistrative
domain / other administraiev domains

</mglt>

16) Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
> Comment> You may want to clarify the scrubbed traffic is re-directed to
> the Enterprise network via the tunneling mechanism.
>

<mglt>
I propose the following text:

OLD:
Redirection to the DDoS
   Mitigation Service Provider typically involves BGP prefix
   announcement eventually combined with DNS redirection, while re-
   injection may be performed via tunneling mechanisms such as GRE for
   example.

NEW:
Redirection to the DDoS
   Mitigation Service Provider typically involves BGP prefix
   announcement eventually combined with DNS redirection, while re-
   injection to the enterprise network may be performed via tunneling
mechanisms such as GRE for
   example.

</mglt>

>
> 17) Of course, such mechanisms needs to be regularly tested and
>    evaluated.
>
> Comment> The above line does not look relevant to this document.
>
> <mglt>

I am fine removing it.

</mglt>

18)   Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> It's not clear how the requesting Enterprise network will learn
> the DDoS attack has ceased ?
>
> <mglt>
DOTS status may be used for example. I hope teh text provided for (2)
clarifies this.
</mglt>

> -Tiru
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

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<div dir=3D"ltr"><div>Hi Tiru, <br></div><div><br></div><div>Thanks for the=
 comments. Please see inline my responses. If the proposed text is fine to =
youI will update the draft and publish a new version by the end of the week=
.<br></div><div><br></div><div>Yours, <br></div><div>Daniel<br></div><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Jun 19, 2018 at=
 9:05 AM, Konda, Tirumaleswar Reddy <span dir=3D"ltr">&lt;<a href=3D"mailto=
:TirumaleswarReddy_Konda@mcafee.com" target=3D"_blank">TirumaleswarReddy_Ko=
nda@<wbr>mcafee.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex">Hi Daniel,<br>
<br>
My comments and nits<br>
<br>
1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<br>
<br></blockquote><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
Comment&gt;=C2=A0 If the DMS in the enterprise network is not capable of de=
tecting outgoing DDoS attack, how will the signaling from the DOTS client i=
n the upstream ITP to the DOTS server in the enterprise network help it to =
detect and mitigate the outgoing DDoS attack ?<br>
<br></blockquote><div>&lt;mglt&gt; <br></div><div><br></div><div>While writ=
ing the use case the example I had in mind was that the ITP could signal th=
e network enterprise that some hosts are being infected and belonging to a =
botnet. The ITP could provide a list of suspicious tagged IPv6 or the indic=
ation that hosts are suspected to belong to a specific botnet. =C2=A0 <br><=
/div><div>The network enterprise may then take the necessary action, monito=
ring specific DNS requests, running specific scans over its hosts... At lea=
st this what I had in mind. The specific signaling should be defined by DOT=
S. Do you think the text should be updated as below ?<br></div><div><br></d=
iv><div><br></div><div>OLD:</div><div>[...] The enterprise network is then =
responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<br>
<br></div><div>NEW:</div><div>[...] The enterprise network is then responsi=
ble to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific security policies which cou=
ld include security checks, updates on the tagged hosts as well as instanti=
ating specific monitoring traffic elements such as certain type of DNS quer=
ies, traffic of specific destination...=C2=A0 In some case the DDoS Mitigat=
ion may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<br>
<br></div><div>&lt;/mglt&gt;</div><div><br></div><blockquote class=3D"gmail=
_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204=
,204);padding-left:1ex">
<br>
2)<br>
=C2=A0 =C2=A0Once the requesting Enterprise Network is confident that the D=
DoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; In the above line, I don&#39;t get &quot;that it has received a=
 DOTS DDoS Mitigation termination request from a downstream Enterprise Netw=
ork or DDoS Mitigation Service Provider&quot;.<br>
I think you mean &quot;or notified by the DDoS Mitigation Service Provider =
that the DDoS attack has stopped&quot;<br>
<br></blockquote><div><br></div><div>&lt;mglt&gt;</div><div>The text attemp=
t to provide reasons for a DOTS Client to send a DOTS DDoS Mitigation termi=
nation request. It could be that a) information received from the upstream =
DMS indicates the attacks has been stopped or that the attack is sufficient=
ly low so that it can handle the attack on its own. On the other hand, in t=
he case of collaboration between DMS, a DMS may end the collaboration with =
an upstream DMS because the downstream DMS has requested so. I propose the =
follwoing clarification, please let me know if that is fine with you:</div>=
<div><br></div><div><br></div><div>OLD:</div><div>Once the requesting Enter=
prise Network is confident that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.</div><div><br></div><div>NEW:<br></div><div>Once the=
 requesting Enterprise Network has been notified by the DDoS Mitigation Ser=
vice<br>
=C2=A0 =C2=A0Provider. the attack has been stopped, or that the level of th=
e attack has fallen to levels of traffic/<br>
=C2=A0 =C2=A0complexity which they can handle on their own, the Enterprise =
Network may notify the DDoS Mitigation Service Provider to stop the DDoS Mi=
tigation. Similarly, when DDoS Mitigation Service<br>
=C2=A0 =C2=A0Providers are collaborating, a DDoS Mitigation Service Provide=
r may relay the request for terminating a DDoS MItigation to the upstream=
=C2=A0DoS Mitigation Service Provider upon request from a downstream=C2=A0 =
DoS Mitigation Service Provider. In any case the termination of a DDoS Miti=
gation is requested by the Network Enterprise DOTS client sending a DOTS DD=
oS Mitigation termination request to the DDoS Mitigation Service Provider.<=
br><div><br></div>&lt;/mglt&gt;</div><div><br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">
3)<br>
<br>
=C2=A0 =C2=A0The pre-arrangement typically includes the agreement on the<br=
>
=C2=A0 =C2=A0mechanisms used to redirect the traffic to the DDoS Mitigation=
<br>
=C2=A0 =C2=A0Service Provider, as well as the mechanism to to re-inject the=
<br>
<br>
=C2=A0&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&=
gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; Remove &quot;to&quot;<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>Done</div><div>&lt;/mglt&gt;</=
div><div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
4)<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation Service: designates a DDoS service pro=
vided to a<br>
=C2=A0 =C2=A0 =C2=A0 customer and which is scoped to mitigate DDoS attacks.=
=C2=A0 Services<br>
=C2=A0 =C2=A0 =C2=A0 usually involve Service Level Agreement (SLA) that hav=
e to be met.<br>
=C2=A0 =C2=A0 =C2=A0 It is the responsibility of the service provider to in=
stantiate<br>
=C2=A0 =C2=A0 =C2=A0 the DDoS Mitigation System to meet these SLAs.<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation System (DMS): A system that performs D=
DoS<br>
=C2=A0 =C2=A0 =C2=A0 mitigation.=C2=A0 The DDoS Mitigation System may be co=
mposed by a<br>
=C2=A0 =C2=A0 =C2=A0 cluster of hardware and/or software resources, but cou=
ld also<br>
=C2=A0 =C2=A0 =C2=A0 involve an orchestrator that may take decisions such a=
s<br>
=C2=A0 =C2=A0 =C2=A0 outsourcing partial or more of the mitigation to anoth=
er DDoS<br>
=C2=A0 =C2=A0 =C2=A0 Mitigation System.<br>
<br>
Nit&gt; For better readability you may want to define &quot;DMS&quot; follo=
wed by &quot;DDoS Mitigation Service&quot;<br></blockquote><div><br></div><=
div>&lt;mglt&gt;</div><div>Done</div><div>&lt;/mglt&gt;<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
5)<br>
=C2=A0 =C2=A0DOTS is at risk from three primary attacks: DOTS agent imperso=
nation,<br>
=C2=A0 =C2=A0traffic injection, and signaling blocking.=C2=A0 The DOTS prot=
ocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<br>
<br>
Comment&gt; A MITM attacker can drop all the DOTS signal channel traffic, d=
esigning the DOTS signal channel protocol for minimal data <br>
transfer will not address the MITM attack.<br></blockquote><div><br></div><=
div>&lt;mglt&gt;</div><div>=C2=A0Agree. I propose to remove: <br></div><div=
>&quot;&quot;&quot;<br> </div><div>The DOTS protocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.</div><div>&quot;&quot;&quot;</div><div>&lt;/mglt&gt;<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">
<br>
6)<br>
=C2=A0 =C2=A0One consideration could be to minimize the security technologi=
es in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<br>
<br>
Comment&gt; The DOTS signal and data channels are using TLS for mutual auth=
entication, confidentiality and data integrity. I don&#39;t see the need fo=
r the above lines.<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>Agree.=C2=A0 I propose to remo=
ve the following lines:</div><div>&quot;&quot;&quot;</div><div> =C2=A0One c=
onsideration could be to minimize the security technologies in use at any o=
ne<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<br></div><div>&quot;&qu=
ot;&quot;<br></div><div><br></div><div>&lt;/mglt&gt;<br></div><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex">
7)<br>
=C2=A0 =C2=A0When the DDoS mitigation is finished on the DMS, the orchestra=
tor<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<br>
<br>
Comment&gt; I think you mean the DDoS attack has stopped. You may want to r=
ephrase the line.<br></blockquote><div><br></div><div>&lt;mglt&gt;</div><di=
v>I propose the following text:<br></div><div><br></div><div>OLD:</div><div=
>When the DDoS mitigation is finished on the DMS, the orchestrator<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.</div><div><br><=
/div><div>NEW:</div><div>When the DDoS attack has stopped, the orchestrator=
<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the end of the DDoS Mitigation.<br></div><div>&l=
t;/mglt&gt;<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex">
8)<br>
=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from the n=
etwork<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<br>
<br>
Comment&gt; You may want to clarify the DOTS client will later be notified =
that the DDoS mitigation is effective.<br></blockquote><div>=C2=A0</div><di=
v>&lt;mglt&gt;</div><div>I propose the following text:</div><div><br></div>=
<div>OLD:</div><div>Upon receiving the DOTS request for DDoS mitigation fro=
m the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.</div><div><br></di=
v><div>NEW:</div><div>Upon receiving the DOTS request for DDoS mitigation f=
rom the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS Mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0=C2=A0 Mitigation is starting while not effective. The DOTS client of=
 the orchestrator will later be notified that the DDoS Mitigation is effect=
ive.<br></div><div><br></div><div><br></div><div>&lt;/mglt&gt;<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">
<br>
9) If the network administrator decides to start the<br>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <br>
<br>
Nit&gt; The above line is not clear, who are &quot;they&quot; in the above =
line ? <br>
<br></blockquote><div>&lt;mglt&gt;</div><div>I propose the followin text:</=
div><div><br></div><div>OLD:</div><div>If the network administrator decides=
 to start the<br>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0=C2=A0</div><div><br>=
</div><div>NEW:</div><div>If the network administrator decides to start the=
<br>
=C2=A0 =C2=A0mitigation, the network administrator orders through her web i=
nterface a DOTS client to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <br></div><div>&lt;/=
mglt&gt;<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">
10) This request is expected to be associated with a context that identifie=
s the DDoS mitigation selected.<br>
<br>
Comment&gt; I don&#39;t understand the context of the above line.<br></bloc=
kquote><div><br></div><div>&lt;mg;t&gt;</div><div>The context constitutes o=
f elements, indications that provides sufficient information to the orchest=
rator to know what needs to be done. in other words, the DDoS Mitigation. <=
br></div><div> </div><div>I propose the following text:</div><div><br></div=
><div>OLD:</div><div>This request is expected to be associated with a conte=
xt that identifies the DDoS mitigation selected.</div><div><br></div><div>N=
EW:</div><div>This request is expected to be associated with a context that=
 identifies or provide sufficient information to the orchestrator to in fer=
 the DDoS Mitigation to elaborate and coordinate.<br></div><div><br></div><=
div>&lt;/mglt&gt;<br></div><div>=C2=A0</div><blockquote class=3D"gmail_quot=
e" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204)=
;padding-left:1ex">
<br>
11)=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from th=
e network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.<br>
<br>
Comment&gt; What is the specified strategy (you may want to give an example=
) ?<br></blockquote><div>&lt;mglt&gt;</div><div>I propose to add the follwo=
ing text, but I am happy if you are willing to provide a more specific exam=
ple. <br></div><div><br></div><div>NEW:</div><div>Upon receiving a request =
to mitigate a DDoS attack performed over a target, the orchestrator, may ev=
aluate the volumetry of the attack as well as the value that represent the =
target. Then it may also request an upstream DMS Provider to filter the tra=
ffic while moving the target to another network so new sessions will not be=
 impacted.<br></div><div><br></div><div>&lt;/mglt&gt;<br></div><div>=C2=A0<=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
12)<br>
The status of the DDoS mitigation indicates the orchestrator is in an analy=
zing phase.<br>
</blockquote><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex">Comment&gt; DOTS signal channel draft does not indicate the mitigation=
 status is in analyzing phase (Please see &quot;Table 2: Values of &#39;sta=
tus&#39; Parameter&quot; in the draft).<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>I propose to remove: <br></div=
><div><br></div><div>&quot;&quot;&quot;</div><div>The status of the DDoS<br=
>mitigation indicates the orchestrator is in an analyzing phase.<br></div><=
div>&quot;&quot;&quot;<br></div><div>&lt;/mglt&gt;</div><div><br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex">
13)<br>
The orchestrator begins collecting various information from various=C2=A0 t=
elemetry systems in order to correlate the measurements and provide=C2=A0 a=
n analysis of the event.<br>
Comment&gt; The orchestrator would anyway be collecting data from various t=
elemetry systems for correlation.<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>Agree. I think what I wanted t=
o say that we may move to a state where finer information is being monitore=
d. I porposed the follwoing text:</div><div><br></div><div>OLD:</div><div>T=
he orchestrator begins collecting various information from various=C2=A0=20
telemetry systems in order to correlate the measurements and provide=C2=A0 =
an
 analysis of the event.</div><div><br></div><div>NEW:</div><div>The orchest=
rator may begin collecting additional fined grain and specific information =
from various=C2=A0=20
telemetry systems in order to correlate the measurements and provide an
 analysis of the event.<br></div><div><br></div><div>&lt;/mglt&gt;</div><di=
v><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
14) These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<br>
<br>
Comment&gt; what do you mean by &quot;some measurement indicators&quot; and=
 &quot;specific reporting&quot; (looks vague to me) ?<br>
<br></blockquote><div>&lt;mglt&gt;</div><div><br></div><div>measurement ind=
icators means to me, some variables that we believe representative for thre=
at detection, this typically involved the traffic load, the number of SYNs.=
..Specific reporting here indicates what the DOTS client refers to while tr=
iggering teh DDoS Mitigation request. I propose teh follwointext:</div><div=
><br></div><div>OLD:</div><div>These systems are configured so that when an=
<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<br></div><div><br></div><div>NEW:</div><di=
v>These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 send DOTS mitigation request to the orchestrator.=C2=A0 The DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with additional informati=
on to let the orchestrator know what has triggered the request. .<br></div>=
<div><br></div><div>&lt;/mglt&gt;</div><div><br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex">
15) Figure 4 (DDoS Orchestration) includes both internal and external DDoS =
mitigation systems, but the usage of internal and external DDoS mitigation =
systems in <br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>I propose the following change=
 in teh beginign of teh section:</div><div><br></div><div><div>OLD:</div><d=
iv>In this use case, one or more DDoS telemetry systems or monitoring<br>de=
vices monitor a network - typically an ISP network. <br></div></div><div><b=
r></div><div>NEW:</div><div>In this use case, one or more DDoS telemetry sy=
stems or monitoring<br>devices spread over one or multiple administrative d=
omains provides health indicator of the network traffic to the orchestrator=
<br></div><div><br></div><div>I also propose to indicate on the figure ( or=
chetsrator adinistrative domain / other administraiev domains<br></div><br>=
<div>&lt;/mglt&gt;</div><div><br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">
16) Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<br>
<br>
Comment&gt; You may want to clarify the scrubbed traffic is re-directed to =
the Enterprise network via the tunneling mechanism.<br></blockquote><div><b=
r></div><div>&lt;mglt&gt;</div><div>I propose the following text:</div><div=
><br></div><div>OLD:</div><div>Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<br></div><div><br></div><div>NEW:</div><div>Redirecti=
on to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection to the enterprise network may be performed via tunne=
ling mechanisms such as GRE for<br>
=C2=A0 =C2=A0example.</div><div><br></div><div>&lt;/mglt&gt;<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">
<br>
17) Of course, such mechanisms needs to be regularly tested and<br>
=C2=A0 =C2=A0evaluated.<br>
<br>
Comment&gt; The above line does not look relevant to this document.<br>
<br></blockquote><div>&lt;mglt&gt;</div><div><br></div><div>I am fine remov=
ing it.</div><div><br></div><div>&lt;/mglt&gt;</div><div><br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex">
18)=C2=A0 =C2=A0Once the requesting Enterprise Network is confident that th=
e DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; It&#39;s not clear how the requesting Enterprise network will l=
earn the DDoS attack has ceased ?<br>
<br></blockquote><div>&lt;mglt&gt;</div><div>DOTS status may be used for ex=
ample. I hope teh text provided for (2) clarifies this.=C2=A0 <br></div><di=
v>&lt;/mglt&gt; <br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
>
-Tiru<br>
<div class=3D"gmail-m_-2513832641471553518gmail-HOEnZb"><div class=3D"gmail=
-m_-2513832641471553518gmail-h5">______________________________<wbr>_______=
__________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
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arget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/dots</a><br>
</div></div></blockquote></div><br></div></div>

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Cc: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>,  Tobias Gondrom <tobias.gondrom@gondrom.org>, "Roman D. Danyliw" <rdd@cert.org>, dots <dots@ietf.org>
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Hi Artyom,

I think I agree with you. Let me know if you are fine with the proposed
text.

Yours,
Daniel

On Tue, Jun 19, 2018 at 9:49 AM, Artyom Gavrichenkov <ximaera@gmail.com>
wrote:

> Good day,
>
> Comments inline,
>
> On Tue, Jun 19, 2018 at 4:12 PM Konda, Tirumaleswar Reddy
> <TirumaleswarReddy_Konda@mcafee.com> wrote:
> > 2)
> > Comment> In the above line, I don't get "that it has received a DOTS
> DDoS Mitigation termination request from a downstream Enterprise Network or
> DDoS Mitigation Service Provider".
> > I think you mean "or notified by the DDoS Mitigation Service Provider
> that the DDoS attack has stopped"
>
> This is the case of DOTS Gateway [I-D.ietf-dots-architecture-06,
> 2.2.3], when a downstream DOTS client sends a termination request to
> the gateway.
>
> | Artyom Gavrichenkov
> | gpg: 2deb 97b1 0a3c 151d b67f 1ee5 00e7 94bc 4d08 9191
> | mailto: ximaera@gmail.com
> | fb: ximaera
> | telegram: xima_era
> | skype: xima_era
> | tel. no: +7 916 515 49 58
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

--000000000000dd410a056f18393a
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<div dir=3D"ltr"><div>Hi Artyom, <br></div><div><br></div><div>I think I ag=
ree with you. Let me know if you are fine with the proposed text.</div><div=
><br></div><div>Yours, <br></div><div>Daniel<br></div></div><div class=3D"g=
mail_extra"><br><div class=3D"gmail_quote">On Tue, Jun 19, 2018 at 9:49 AM,=
 Artyom Gavrichenkov <span dir=3D"ltr">&lt;<a href=3D"mailto:ximaera@gmail.=
com" target=3D"_blank">ximaera@gmail.com</a>&gt;</span> wrote:<br><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex">Good day,<br>
<br>
Comments inline,<br>
<br>
On Tue, Jun 19, 2018 at 4:12 PM Konda, Tirumaleswar Reddy<br>
&lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com">TirumaleswarReddy=
_Konda@<wbr>mcafee.com</a>&gt; wrote:<br>
&gt; 2)<br>
<span class=3D"">&gt; Comment&gt; In the above line, I don&#39;t get &quot;=
that it has received a DOTS DDoS Mitigation termination request from a down=
stream Enterprise Network or DDoS Mitigation Service Provider&quot;.<br>
&gt; I think you mean &quot;or notified by the DDoS Mitigation Service Prov=
ider that the DDoS attack has stopped&quot;<br>
<br>
</span>This is the case of DOTS Gateway [I-D.ietf-dots-architecture-<wbr>06=
,<br>
2.2.3], when a downstream DOTS client sends a termination request to<br>
the gateway.<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
| Artyom Gavrichenkov<br>
| gpg: 2deb 97b1 0a3c 151d b67f 1ee5 00e7 94bc 4d08 9191<br>
| mailto: <a href=3D"mailto:ximaera@gmail.com">ximaera@gmail.com</a><br>
| fb: ximaera<br>
| telegram: xima_era<br>
| skype: xima_era<br>
| tel. no: +7 916 515 49 58<br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
______________________________<wbr>_________________<br>
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arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dots</a><br>
</div></div></blockquote></div><br></div>

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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/jz9hPljdtnYe7tKCSMhsrgTL9mA>
Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Daniel Migault <daniel.migault@ericsson.com>, Artyom Gavrichenkov <ximaera@gmail.com>
CC: Tobias Gondrom <tobias.gondrom@gondrom.org>, "Roman D. Danyliw" <rdd@cert.org>, dots <dots@ietf.org>
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Mon, 25 Jun 2018 23:02:55 -0400
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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Hi,

Thanks for the feed backs. IN my opinion the only issues that remain open
are issues 1 and 15 . These are copied below. I provided also inline the
status of each issues - for further details. Once we are clear with these
two issues, I will publish a new version.

Thanks you very much for teh comments.

Yours,
Daniel



1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
<mglt>
I understand your comment for the hints. These were example of information
provided. I agree to mention as GEN-004 that information is a hints that
may be interpreted.
What is not clear to me is that I do not see how volumetric attacks can be
addressed in this case. A volumetric attack whose target is in the
Enterprise Network woudl be detected by the DMS of that Enterprise network.
In that case the DMS of the Enterprise network will have a DOTS client
sending a request to the DOTS Server of the ITP..  This is not the case we
consider here as it has already been described as the primary
alternative.The reason for a ITP DMS to send a request to the DMS of the
Enterprise could be 1) the Enterprise network is taking part of a DDoS
atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS Enterprise
network. I see 1) as informing that hosts of the network are being infected
and being part of a botnet. I am confused by 2) as I see ITP DMS with ways
more resource than the Enterprise network. Could you elaborate a bit on the
scenario ?

</mglt>

15) Figure 4 (DDoS Orchestration) includes both internal and external DDoS
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
<mglt>
The use case considers the following administrative domains: ITP and
Enterprise Network. I propose to simply replace "internal" by Enterprise
Network and "external" by ITP.

</mglt>



On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Daniel,
>
>
>
> Please see inline [TR]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Thursday, June 21, 2018 1:28 AM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> Thanks for the comments. Please see inline my responses. If the proposed
> text is fine to youI will update the draft and publish a new version by t=
he
> end of the week.
>
>
>
> Yours,
>
> Daniel
>
>
>
> On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
> My comments and nits
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
<mglt>
I understand your comment. These were example of information provided. I
agree to mention as GEN-004 that information is a hints that may be
interpreted. I do not see how volumetric attacks can be addressed in this
case. A volumetric attack whose target is in the Entreprise Network woudl
be detected by the DMS of that Enterprise network. In that case the DMS of
the Enterprise network will have a DOTS client sending a request to the
DOTS Server of the ITP..  This is not the case we consider here as it has
already been described as the primary alternative.The reason for a ITP DMS
to send a request to the DMS of the Enterprise could be 1) the Enterprise
network is taking part of a DDoS atatck, 2) the ITP DMS delegate the DDoS
mitigation to the DMS Enterprise network. I see 1) as informing that hosts
of the network are being infected and being part of a botnet. I am confused
by 2) as I see ITP DMS with ways more resource than the Enterprise network.
Could you elaborate a bit on the scenario you have in mind ?

</mglt>

>
> 2)
>    Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> In the above line, I don't get "that it has received a DOTS DDoS
> Mitigation termination request from a downstream Enterprise Network or DD=
oS
> Mitigation Service Provider".
> I think you mean "or notified by the DDoS Mitigation Service Provider tha=
t
> the DDoS attack has stopped"
>
>
>
> <mglt>
>
> The text attempt to provide reasons for a DOTS Client to send a DOTS DDoS
> Mitigation termination request. It could be that a) information received
> from the upstream DMS indicates the attacks has been stopped or that the
> attack is sufficiently low so that it can handle the attack on its own. O=
n
> the other hand, in the case of collaboration between DMS, a DMS may end t=
he
> collaboration with an upstream DMS because the downstream DMS has request=
ed
> so. I propose the follwoing clarification, please let me know if that is
> fine with you:
>
>
>
>
>
> OLD:
>
> Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
>
>
> NEW:
>
> Once the requesting Enterprise Network has been notified by the DDoS
> Mitigation Service
>    Provider. the attack has been stopped, or that the level of the attack
> has fallen to levels of traffic/
>    complexity which they can handle on their own, the Enterprise Network
> may notify the DDoS Mitigation Service Provider to stop the DDoS
> Mitigation.
>
>
>
>
>
> [TR] You may want to simplify the above text as follows :
>
> The DOTS server notifies the mitigation metrics to the DOTS client. If th=
e
> DDoS attack has stopped or the severity of the attack has subsided, the
> DOTS client can request the DDoS Mitigation Service Provider to stop the
> DDoS Mitigation.
>
>
>
>
>
> Similarly, when DDoS Mitigation Service Providers are collaborating, a
> DDoS Mitigation Service Provider may relay the request for terminating a
> DDoS MItigation to the upstream DoS Mitigation Service Provider upon
> request from a downstream  DoS Mitigation Service Provider. In any case t=
he
> termination of a DDoS Mitigation is requested by the Network Enterprise
> DOTS client sending a DOTS DDoS Mitigation termination request to the DDo=
S
> Mitigation Service Provider.
>
>
>
> [TR] I am not sure about the above lines, DDoS mitigation service
> providers collaborating with each other does not look relevant to this us=
e
> case. You may want to remove the above lines.
>
>
>
> </mglt>
>
>
>
<mglt>
The reason for mentioning the collaboration was to indicate there are
multiple reasons to stop the mitigation. You can be the one deciding given
the status provided or your can can do that because you have been asked to
do it. I am fine removing the latest case. Done.

</mglt>

> 3)
>
>    The pre-arrangement typically includes the agreement on the
>    mechanisms used to redirect the traffic to the DDoS Mitigation
>    Service Provider, as well as the mechanism to to re-inject the
>
>  >>>>>>>>>>>>>>>>>>>>>>>>>>> Remove "to"
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
> 4)
>
>    o  DDoS Mitigation Service: designates a DDoS service provided to a
>       customer and which is scoped to mitigate DDoS attacks.  Services
>       usually involve Service Level Agreement (SLA) that have to be met.
>       It is the responsibility of the service provider to instantiate
>       the DDoS Mitigation System to meet these SLAs.
>
>    o  DDoS Mitigation System (DMS): A system that performs DDoS
>       mitigation.  The DDoS Mitigation System may be composed by a
>       cluster of hardware and/or software resources, but could also
>       involve an orchestrator that may take decisions such as
>       outsourcing partial or more of the mitigation to another DDoS
>       Mitigation System.
>
> Nit> For better readability you may want to define "DMS" followed by "DDo=
S
> Mitigation Service"
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
>
> 5)
>    DOTS is at risk from three primary attacks: DOTS agent impersonation,
>    traffic injection, and signaling blocking.  The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> Comment> A MITM attacker can drop all the DOTS signal channel traffic,
> designing the DOTS signal channel protocol for minimal data
> transfer will not address the MITM attack.
>
>
>
> <mglt>
>
>  Agree. I propose to remove:
>
> """
>
> The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> """
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
<mglt>
done
</mglt>

>
> 6)
>    One consideration could be to minimize the security technologies in us=
e
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> Comment> The DOTS signal and data channels are using TLS for mutual
> authentication, confidentiality and data integrity. I don't see the need
> for the above lines.
>
> <mglt>
>
> Agree.  I propose to remove the following lines:
>
> """
>
>  One consideration could be to minimize the security technologies in use
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> """
>
>
>
> </mglt>
>
>
>
> [TR] Okay.
>
>
>
<mglt>
done
</mglt>

> 7)
>    When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
> Comment> I think you mean the DDoS attack has stopped. You may want to
> rephrase the line.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
>
>
> NEW:
>
> When the DDoS attack has stopped, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the end of the DDoS Mitigation.
>
> </mglt>
>
>
>
> [TR] Looks good.
>
> <mglt>
done
</mglt>

>
>
> 8)
>    Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
> Comment> You may want to clarify the DOTS client will later be notified
> that the DDoS mitigation is effective.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
>
>
> NEW:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS Mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    Mitigation is starting while not effective. The DOTS client of the
> orchestrator will later be notified that the DDoS Mitigation is effective=
.
>
>
>
> [TR] Looks good.
>
>
>
<mglt>
done
</mglt>


>
> </mglt>
>
>
> 9) If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
> Nit> The above line is not clear, who are "they" in the above line ?
>
> <mglt>
>
> I propose the followin text:
>
>
>
> OLD:
>
> If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
>
>
> NEW:
>
> If the network administrator decides to start the
>    mitigation, the network administrator orders through her web interface
> a DOTS client to
>    send a request for DDoS mitigation.
>
> </mglt>
>
>
>
> [TR] You may want to remove gender from the above line and simplify the
> text.
>
> NEW:
>
> If the network administrator decides to start the
> mitigation, the network administrator triggers the DDoS mitigation reques=
t
> using the web interface of a DOTS client.
>
>
>
>
>
<mglt>
Done
</mglt>

> 10) This request is expected to be associated with a context that
> identifies the DDoS mitigation selected.
>
> Comment> I don't understand the context of the above line.
>
>
>
> <mg;t>
>
> The context constitutes of elements, indications that provides sufficient
> information to the orchestrator to know what needs to be done. in other
> words, the DDoS Mitigation.
>
> I propose the following text:
>
>
>
> OLD:
>
> This request is expected to be associated with a context that identifies
> the DDoS mitigation selected.
>
>
>
> NEW:
>
> This request is expected to be associated with a context that identifies
> or provide sufficient information to the orchestrator to in fer the DDoS
> Mitigation to elaborate and coordinate.
>
>
>
> [TR] NEW:
>
> This request is expected to be associated with a context that provides
> sufficient information to the orchestrator to infer the DDoS Mitigation t=
o
> elaborate and coordinate.
>
>
>
>
>
> </mglt>
>
>
>
<mglt
done
</mglt>

>
> 11)   Upon receiving the DOTS request for DDoS mitigation from the networ=
k
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.
>
> Comment> What is the specified strategy (you may want to give an example)=
 ?
>
> <mglt>
>
> I propose to add the follwoing text, but I am happy if you are willing to
> provide a more specific example.
>
>
>
> NEW:
>
> Upon receiving a request to mitigate a DDoS attack performed over a
> target, the orchestrator, may evaluate the volumetry of the attack as wel=
l
> as the value that represent the target. Then it may also request an
> upstream DMS Provider to filter the traffic while moving the target to
> another network so new sessions will not be impacted.
>
>
>
> [TR] I don=E2=80=99t think moving the target to a different network is ea=
sy.
> However, the orchestrator may select the DDoS mitigation provider based o=
n
> the attack severity.
>
>
>
> </mglt>
>
>
>
<mglt>
I agree MTD is not easy, but I wanted to stress that the orchestrator can
be coordinate complex operations ,that is a bit more than delegating. I
have added the following text:

NEW:
Upon receiving a request to mitigate a DDoS attack performed over a target,
the orchestrator, may evaluate the volumetry of the attack as well as the
value that represent the target. The orchestrator may select the DDoS
Mitigation Service  Provider based on the attack severity. It may also
coordinate the DDoS Mitigation performed by the DDoS Mitigation Service
Provider with some other tasks such as for example,  moving the target to
another network so new sessions will not be impacted.


</mglt>

>
> 12)
> The status of the DDoS mitigation indicates the orchestrator is in an
> analyzing phase.
>
>
>
> Comment> DOTS signal channel draft does not indicate the mitigation statu=
s
> is in analyzing phase (Please see "Table 2: Values of 'status' Parameter"
> in the draft).
>
> <mglt>
>
> I propose to remove:
>
>
>
> """
>
> The status of the DDoS
> mitigation indicates the orchestrator is in an analyzing phase.
>
> """
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
 <mglt>
Done
</mglt>

> 13)
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
> Comment> The orchestrator would anyway be collecting data from various
> telemetry systems for correlation.
>
> <mglt>
>
> Agree. I think what I wanted to say that we may move to a state where
> finer information is being monitored. I porposed the follwoing text:
>
>
>
> OLD:
>
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
>
>
>
> NEW:
>
> The orchestrator may begin collecting additional fined grain and specific
> information from various  telemetry systems in order to correlate the
> measurements and provide an analysis of the event.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
>
>
 <mglt>
Done
</mglt>

> 14) These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
> Comment> what do you mean by "some measurement indicators" and "specific
> reporting" (looks vague to me) ?
>
> <mglt>
>
>
>
> measurement indicators means to me, some variables that we believe
> representative for threat detection, this typically involved the traffic
> load, the number of SYNs...Specific reporting here indicates what the DOT=
S
> client refers to while triggering teh DDoS Mitigation request. I propose
> teh follwointext:
>
>
>
> OLD:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
>
>
> NEW:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>   send DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with additional information to le=
t
> the orchestrator know what has triggered the request.
>
>
>
> [TR] Okay (Mitigation hints (=E2=80=9Cadditional information=E2=80=9D) ar=
e optional and is
> not mandatory to be conveyed in the mitigation request).
>
>
>
> </mglt>
>
>
>

<mglt>

Done

The following text has been added:
These systems are configured so that when an event or some measurement
indicators reach a predefined level to send DOTS mitigation request to
the orchestrator.  The DOTS mitigation request may be associated with
some optional mitigation hints to let the orchestrator know what has
triggered the request.
</mglt>

15) Figure 4 (DDoS Orchestration) includes both internal and external DDoS
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
<mglt>
The use case considers teh following administrative domains: ITP and
Enterprise Network. I propose to simply replace internal by Enterprise
Network and external by ITP.

</mglt>

> 16) Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
> Comment> You may want to clarify the scrubbed traffic is re-directed to
> the Enterprise network via the tunneling mechanism.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
>
>
> NEW:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection to the enterprise network may be performed via tunneling
> mechanisms such as GRE for
>    example.
>
>
>
> [TR] DNS redirection and BGP routing are two different diversion
> techniques, DNS redirection is not required after BGP announcement.
>
>
>
> [TR]
>
> NEW:
>
> Redirection to the DDoS
> Mitigation Service Provider typically involves BGP prefix
> announcement or DNS redirection, while re-injection of the scrubbed
> traffic to the enterprise network may be performed via tunneling mechanis=
ms
> such as GRE for
> example.
>
>
>
>
>
> </mglt>
>
>
> <mglt>
Done
</mglt>

17) Of course, such mechanisms needs to be regularly tested and
>    evaluated.
>
> Comment> The above line does not look relevant to this document.
>
> <mglt>
>
>
>
> I am fine removing it.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
<mglt>
Done
</mglt>


>
> 18)   Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> It's not clear how the requesting Enterprise network will learn
> the DDoS attack has ceased ?
>
> <mglt>
>
> DOTS status may be used for example. I hope teh text provided for (2)
> clarifies this.
>
>
>
> [TR] You may want to rephrase the above line similar to the new text you
> have provided for (2).
>
>
>
> Cheers,
>
> -Tiru
>
>
>
> </mglt>
>
> -Tiru
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>

--000000000000238f50056f82bcd9
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi, <br></div><div><br></div><div>Thanks for the feed=
 backs. IN my opinion the only issues that remain open are issues 1 and 15 =
. These are copied below. I provided also inline the status of each issues =
- for further details. Once we are clear with these two issues, I will publ=
ish a new version. <br></div><div><br></div><div>Thanks you very much for t=
eh comments. <br></div><div><br></div><div>Yours, <br></div><div>Daniel<br>=
</div><div><br></div><div><br></div><div><br></div><div> <blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_=
-2328220809847430590m_-1907154065627156770WordSection1"><div style=3D"borde=
r-color:currentcolor currentcolor currentcolor blue;border-style:none none =
none solid;border-width:medium medium medium 1.5pt;padding:0in 0in 0in 4pt"=
><div><div><div><div><div class=3D"gmail-m_-2328220809847430590h5"><blockqu=
ote style=3D"border-color:currentcolor currentcolor currentcolor rgb(204,20=
4,204);border-style:none none none solid;border-width:medium medium medium =
1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><p class=3D=
"MsoNormal" style=3D"margin-bottom:12pt">1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt;=C2=A0 If th=
e=20
DMS in the enterprise network is not capable of detecting outgoing DDoS=20
attack, how will the signaling from the DOTS client in the upstream ITP=20
to the DOTS server in the enterprise network help
 it to detect and mitigate the outgoing DDoS attack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt; <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in=20
mind was that the ITP could signal the network enterprise that some=20
hosts are being infected and belonging to a botnet. The ITP could=20
provide a list of suspicious tagged IPv6 or the indication
 that hosts are suspected to belong to a specific botnet. =C2=A0 <u></u><u>=
</u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary=
=20
action, monitoring specific DNS requests, running specific scans over=20
its hosts... At least this what I had in mind. The specific signaling=20
should be defined by DOTS. Do you think the text
 should be updated as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div></div><div><div><div class=3D"gmail-m_-2328220809847430590h5">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list
 of suspicious hosts with some additional information related the=20
detected attacks such as DDoS, Botnet, .... According to the type of=20
attack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the=20
tagged hosts as well as instantiating specific monitoring traffic=20
elements such as certain type of DNS queries, traffic of specific=20
destination...=C2=A0 In some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div></div><p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[TR] The=20
above text is not completely clear. The above text assumes hosts in the=20
enterprise network are not behind NAT. Further, DMS in the enterprise=20
network should be monitoring both incoming and outgoing
 traffic and capable of detecting outgoing DDoS attacks. I think the use
 case should only focus on volumetric attack exceeding the capacity of=20
the DMS in the Enterprise network and not discuss multiple attack=20
vectors (You may also want to look into the requirement
 GEN-004 (Mitigation hinting) in the requirements draft). <u></u><u></u></p=
>
</div><div><div class=3D"gmail-m_-2328220809847430590h5">
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></div></div></div></div></div=
></div></div></div></blockquote><div>&lt;mglt&gt;</div><div>I
 understand your comment for the hints. These were example of information p=
rovided. I=20
agree to mention as GEN-004 that information is a hints that may be=20
interpreted. <br></div><div>What is not clear to me is that I do not see ho=
w volumetric attacks can be addressed in=20
this case. A volumetric attack whose target is in the Enterprise Network
 woudl be detected by the DMS of that Enterprise network. In that case=20
the DMS of the Enterprise network will have a DOTS client sending a=20
request to the DOTS Server of the ITP..=C2=A0 This is not the case we=20
consider here as it has already been described as the primary=20
alternative.The reason for a ITP DMS to send a request to the DMS of the
 Enterprise could be 1) the Enterprise network is taking part of a DDoS=20
atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS=20
Enterprise network. I see 1) as informing that hosts of the network are=20
being infected and being part of a botnet. I am confused by 2) as I see=20
ITP DMS with ways more resource than the Enterprise network. Could you=20
elaborate a bit on the scenario ?</div><div><br></div><div>&lt;/mglt&gt;</d=
iv><br></div><div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px=
 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div la=
ng=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-19071540656271567=
70WordSection1"><div style=3D"border-color:currentcolor currentcolor curren=
tcolor blue;border-style:none none none solid;border-width:medium medium me=
dium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><blockquote style=
=3D"border-color:currentcolor currentcolor currentcolor rgb(204,204,204);bo=
rder-style:none none none solid;border-width:medium medium medium 1pt;paddi=
ng:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">15) Figure 4 (DDoS=20
Orchestration) includes both internal and external DDoS mitigation=20
systems, but the usage of internal and external DDoS mitigation systems=20
in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple =
administrative domain use case. Why would multiple ISPs use the same orches=
trator ?<u></u><u></u></p>
</div><span>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>&lt;mglt&gt;</div><div>The
 use case considers the following administrative domains: ITP and=20
Enterprise Network. I propose to simply replace &quot;internal&quot; by Ent=
erprise=20
Network and &quot;external&quot; by ITP. <br></div><div> <br></div><div>&lt=
;/mglt&gt;</div><br></div><div><br></div><div><div class=3D"gmail_extra"><b=
r><div class=3D"gmail_quote">On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tiruma=
leswar Reddy <span dir=3D"ltr">&lt;<a href=3D"mailto:TirumaleswarReddy_Kond=
a@mcafee.com" target=3D"_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>=
&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordSection=
1">
<p class=3D"MsoNormal">Hi Daniel, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Please see inline [TR]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-2328220809847430590_m_-190715406562715=
6770__MailEndCompose"><u></u>=C2=A0<u></u></a></p>
<span></span>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;borde=
r-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in"=
>
<p class=3D"MsoNormal"><b>From:</b> <a href=3D"mailto:mglt.ietf@gmail.com" =
target=3D"_blank">mglt.ietf@gmail.com</a> [mailto:<a href=3D"mailto:mglt.ie=
tf@gmail.com" target=3D"_blank">mglt.ietf@gmail.com</a>]
<b>On Behalf Of </b>Daniel Migault<br>
<b>Sent:</b> Thursday, June 21, 2018 1:28 AM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@McAfe<wbr>=
<a href=3D"http://e.com">e.com</a>&gt;<br>
<b>Cc:</b> Tobias Gondrom &lt;<a href=3D"mailto:tobias.gondrom@gondrom.org"=
 target=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a=
 href=3D"mailto:rdd@cert.org" target=3D"_blank">rdd@cert.org</a>&gt;; <a hr=
ef=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
<b>Subject:</b> Re: [Dots] WGLC for use cases draft - until July-1.<u></u><=
u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"gmail-m_-2328220809847430590m_-1907154065627156770MsoNormal=
Table" style=3D"background:rgb(243,255,51) none repeat scroll 0% 0%;border:=
1.5pt solid rgb(155,154,135)" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:medium none;padding:0.75pt">
<p><b><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:rgb(155=
,139,62)">CAUTION</span></b><span style=3D"font-family:&quot;Arial&quot;,sa=
ns-serif;color:rgb(155,139,62)">:</span><span style=3D"font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"> External email. Do not click links or op=
en
 attachments unless you recognize the sender and know the content is safe.<=
/span><span style=3D"font-family:&quot;Arial&quot;,sans-serif"><u></u><u></=
u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
<div><div><div class=3D"gmail-m_-2328220809847430590h5">
<div>
<p class=3D"MsoNormal">Hi Tiru, <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the comments. Please see inline my respon=
ses. If the proposed text is fine to youI will update the draft and publish=
 a new version by the end of the week.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours, <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
</div></div><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div><div><div class=3D"gmail-m_-2328220809847430590h5">
<p class=3D"MsoNormal">On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@mcafe<wbr>e.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Hi Daniel,<br>
<br>
My comments and nits<br>
<br>
1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt;=C2=A0 If th=
e DMS in the enterprise network is not capable of detecting outgoing DDoS a=
ttack, how will the signaling from the DOTS client in the upstream ITP to t=
he DOTS server in the enterprise network help
 it to detect and mitigate the outgoing DDoS attack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt; <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in mind=
 was that the ITP could signal the network enterprise that some hosts are b=
eing infected and belonging to a botnet. The ITP could provide a list of su=
spicious tagged IPv6 or the indication
 that hosts are suspected to belong to a specific botnet. =C2=A0 <u></u><u>=
</u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary a=
ction, monitoring specific DNS requests, running specific scans over its ho=
sts... At least this what I had in mind. The specific signaling should be d=
efined by DOTS. Do you think the text
 should be updated as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div></div><div><div><div class=3D"gmail-m_-2328220809847430590h5">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the tagg=
ed hosts as well as instantiating specific monitoring traffic elements such=
 as certain type of DNS queries, traffic of specific destination...=C2=A0 I=
n some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div></div><p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[TR] The ab=
ove text is not completely clear. The above text assumes hosts in the enter=
prise network are not behind NAT. Further, DMS in the enterprise network sh=
ould be monitoring both incoming and outgoing
 traffic and capable of detecting outgoing DDoS attacks. I think the use ca=
se should only focus on volumetric attack exceeding the capacity of the DMS=
 in the Enterprise network and not discuss multiple attack vectors (You may=
 also want to look into the requirement
 GEN-004 (Mitigation hinting) in the requirements draft). <u></u><u></u></p=
>
</div><div><div class=3D"gmail-m_-2328220809847430590h5">
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></div></div></div></div></div=
></div></div></div></blockquote><div>&lt;mglt&gt;</div><div>I understand yo=
ur comment. These were example of information provided. I agree to mention =
as GEN-004 that information is a hints that may be interpreted. I do not se=
e how volumetric attacks can be addressed in this case. A volumetric attack=
 whose target is in the Entreprise Network woudl be detected by the DMS of =
that Enterprise network. In that case the DMS of the Enterprise network wil=
l have a DOTS client sending a request to the DOTS Server of the ITP..=C2=
=A0 This is not the case we consider here as it has already been described =
as the primary alternative.The reason for a ITP DMS to send a request to th=
e DMS of the Enterprise could be 1) the Enterprise network is taking part o=
f a DDoS atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS Ent=
erprise network. I see 1) as informing that hosts of the network are being =
infected and being part of a botnet. I am confused by 2) as I see ITP DMS w=
ith ways more resource than the Enterprise network. Could you elaborate a b=
it on the scenario you have in mind ?</div><div><br></div><div>&lt;/mglt&gt=
;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"E=
N-US"><div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordS=
ection1"><div style=3D"border-color:currentcolor currentcolor currentcolor =
blue;border-style:none none none solid;border-width:medium medium medium 1.=
5pt;padding:0in 0in 0in 4pt"><div><div><div><div><div class=3D"gmail-m_-232=
8220809847430590h5"><div><p class=3D"MsoNormal"><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
2)<br>
=C2=A0 =C2=A0Once the requesting Enterprise Network is confident that the D=
DoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; In the above line, I don&#39;t get &quot;that it has received a=
 DOTS DDoS Mitigation termination request from a downstream Enterprise Netw=
ork or DDoS Mitigation Service Provider&quot;.<br>
I think you mean &quot;or notified by the DDoS Mitigation Service Provider =
that the DDoS attack has stopped&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The text attempt to provide reasons for a DOTS Clien=
t to send a DOTS DDoS Mitigation termination request. It could be that a) i=
nformation received from the upstream DMS indicates the attacks has been st=
opped or that the attack is sufficiently
 low so that it can handle the attack on its own. On the other hand, in the=
 case of collaboration between DMS, a DMS may end the collaboration with an=
 upstream DMS because the downstream DMS has requested so. I propose the fo=
llwoing clarification, please let
 me know if that is fine with you:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Once the requesting Enterprise Network is confident =
that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div></div><div><div><div class=3D"gmail-m_-2328220809847430590h5">
<p class=3D"MsoNormal">Once the requesting Enterprise Network has been noti=
fied by the DDoS Mitigation Service<br>
=C2=A0 =C2=A0Provider. the attack has been stopped, or that the level of th=
e attack has fallen to levels of traffic/<br>
=C2=A0 =C2=A0complexity which they can handle on their own, the Enterprise =
Network may notify the DDoS Mitigation Service Provider to stop the DDoS Mi=
tigation.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div></div><p class=3D"MsoNormal">[TR] You may want to simplify the above =
text as follows :<u></u><u></u></p>
<p class=3D"MsoNormal">The DOTS server notifies the mitigation metrics to t=
he DOTS client. If the DDoS attack has stopped or the severity of the attac=
k has subsided, the DOTS client can request the DDoS Mitigation Service Pro=
vider to stop the DDoS Mitigation.<u></u><u></u></p><span>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Similarly, when DDoS Mitigation Service Providers ar=
e collaborating, a DDoS Mitigation Service Provider may relay the request f=
or terminating a DDoS MItigation to the upstream=C2=A0DoS Mitigation Servic=
e Provider upon request from a downstream=C2=A0
 DoS Mitigation Service Provider. In any case the termination of a DDoS Mit=
igation is requested by the Network Enterprise DOTS client sending a DOTS D=
DoS Mitigation termination request to the DDoS Mitigation Service Provider.=
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] I am not sure about the above lines, DDo=
S mitigation service providers collaborating with each other does not look =
relevant to this use case. You may want to remove the above lines.
<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>&lt;mglt&gt;</div><div>The reason for menti=
oning the collaboration was to indicate there are multiple reasons to stop =
the mitigation. You can be the one deciding given the status provided or yo=
ur can can do that because you have been asked to do it. I am fine removing=
 the latest case. Done.<br></div><div> <br></div><div>&lt;/mglt&gt;<br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><di=
v class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordSection1">=
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt"><div><div><div><span><div><p class=3D"MsoNormal"><u></u=
></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">3)<br>
<br>
=C2=A0 =C2=A0The pre-arrangement typically includes the agreement on the<br=
>
=C2=A0 =C2=A0mechanisms used to redirect the traffic to the DDoS Mitigation=
<br>
=C2=A0 =C2=A0Service Provider, as well as the mechanism to to re-inject the=
<br>
<br>
=C2=A0&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&=
gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; Remove &quot;to&quot;<u></u><u></u>=
</p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">4)<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation Service: designates a DDoS service pro=
vided to a<br>
=C2=A0 =C2=A0 =C2=A0 customer and which is scoped to mitigate DDoS attacks.=
=C2=A0 Services<br>
=C2=A0 =C2=A0 =C2=A0 usually involve Service Level Agreement (SLA) that hav=
e to be met.<br>
=C2=A0 =C2=A0 =C2=A0 It is the responsibility of the service provider to in=
stantiate<br>
=C2=A0 =C2=A0 =C2=A0 the DDoS Mitigation System to meet these SLAs.<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation System (DMS): A system that performs D=
DoS<br>
=C2=A0 =C2=A0 =C2=A0 mitigation.=C2=A0 The DDoS Mitigation System may be co=
mposed by a<br>
=C2=A0 =C2=A0 =C2=A0 cluster of hardware and/or software resources, but cou=
ld also<br>
=C2=A0 =C2=A0 =C2=A0 involve an orchestrator that may take decisions such a=
s<br>
=C2=A0 =C2=A0 =C2=A0 outsourcing partial or more of the mitigation to anoth=
er DDoS<br>
=C2=A0 =C2=A0 =C2=A0 Mitigation System.<br>
<br>
Nit&gt; For better readability you may want to define &quot;DMS&quot; follo=
wed by &quot;DDoS Mitigation Service&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><span>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal"><br>
5)<br>
=C2=A0 =C2=A0DOTS is at risk from three primary attacks: DOTS agent imperso=
nation,<br>
=C2=A0 =C2=A0traffic injection, and signaling blocking.=C2=A0 The DOTS prot=
ocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<br>
<br>
Comment&gt; A MITM attacker can drop all the DOTS signal channel traffic, d=
esigning the DOTS signal channel protocol for minimal data
<br>
transfer will not address the MITM attack.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0Agree. I propose to remove: <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The DOTS protocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></div></div></div></div></div=
></div></blockquote><div>&lt;mglt&gt;</div><div>done<br></div><div>&lt;/mgl=
t&gt;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0p=
x 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=
=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770=
WordSection1"><div style=3D"border-color:currentcolor currentcolor currentc=
olor blue;border-style:none none none solid;border-width:medium medium medi=
um 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><div><p class=3D"MsoNormal=
"><u></u></p>
</div><span>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
6)<br>
=C2=A0 =C2=A0One consideration could be to minimize the security technologi=
es in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<br>
<br>
Comment&gt; The DOTS signal and data channels are using TLS for mutual auth=
entication, confidentiality and data integrity. I don&#39;t see the need fo=
r the above lines.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree.=C2=A0 I propose to remove the following lines=
:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0One consideration could be to minimize the sec=
urity technologies in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Okay. <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></div></div></div></div></div=
></div></blockquote><div>&lt;mglt&gt;</div><div>done</div><div>&lt;/mglt&gt=
;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"E=
N-US"><div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordS=
ection1"><div style=3D"border-color:currentcolor currentcolor currentcolor =
blue;border-style:none none none solid;border-width:medium medium medium 1.=
5pt;padding:0in 0in 0in 4pt"><div><div><div><div><p class=3D"MsoNormal"><u>=
</u></p>
</div><span>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">7)<br>
=C2=A0 =C2=A0When the DDoS mitigation is finished on the DMS, the orchestra=
tor<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<br>
<br>
Comment&gt; I think you mean the DDoS attack has stopped. You may want to r=
ephrase the line.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS mitigation is finished on the DMS, the=
 orchestrator<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<u></u><u></u></=
p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS attack has stopped, the orchestrator<b=
r>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the end of the DDoS Mitigation.<u></u><u></u></p=
>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Looks good. <u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"></p></div></span></div></div></div></div></div></div=
></blockquote><div>&lt;mglt&gt;</div><div>done</div><div>&lt;/mglt&gt;<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US">=
<div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordSection=
1"><div style=3D"border-color:currentcolor currentcolor currentcolor blue;b=
order-style:none none none solid;border-width:medium medium medium 1.5pt;pa=
dding:0in 0in 0in 4pt"><div><div><div><span><div><p class=3D"MsoNormal">=C2=
=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">8)<br>
=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from the n=
etwork<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<br>
<br>
Comment&gt; You may want to clarify the DOTS client will later be notified =
that the DDoS mitigation is effective.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS Mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0=C2=A0 Mitigation is starting while not effective. The DOTS client of=
 the orchestrator will later be notified that the DDoS Mitigation is effect=
ive.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] Looks good.<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>&lt;mglt&gt;</div><div>done</div><div>&lt;/=
mglt&gt;</div><div><br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-190715=
4065627156770WordSection1"><div style=3D"border-color:currentcolor currentc=
olor currentcolor blue;border-style:none none none solid;border-width:mediu=
m medium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><p=
 class=3D"MsoNormal"><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
9) If the network administrator decides to start the<br>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <br>
<br>
Nit&gt; The above line is not clear, who are &quot;they&quot; in the above =
line ? <u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the followin text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0=C2=A0<u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, the network administrator orders through her web i=
nterface a DOTS client to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] You may want to remove gender from the above li=
ne and simplify the text.
<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal"><span>If the network administrator decides to start =
the<br></span>
mitigation, the network administrator triggers the DDoS mitigation request =
using the web interface of a DOTS client.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal">=C2=A0</p></div></span></div></div></div></div></div=
></div></blockquote><div>&lt;mglt&gt;</div><div>Done</div><div>&lt;/mglt&gt=
;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.=
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"E=
N-US"><div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordS=
ection1"><div style=3D"border-color:currentcolor currentcolor currentcolor =
blue;border-style:none none none solid;border-width:medium medium medium 1.=
5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><p class=3D"MsoNorma=
l"><u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">10) This request is expected to be associated with a=
 context that identifies the DDoS mitigation selected.<br>
<br>
Comment&gt; I don&#39;t understand the context of the above line.<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mg;t&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The context constitutes of elements, indications tha=
t provides sufficient information to the orchestrator to know what needs to=
 be done. in other words, the DDoS Mitigation.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies the DDoS mitigation selected.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies or provide sufficient information to the orchestrator =
to in fer the DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p=
>
</div>
</span><div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that provides sufficient information to the orchestrator to infer the =
DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0</p></div></span></div></div></div></div></div=
></div></blockquote><div>&lt;mglt</div><div>done</div><div>&lt;/mglt&gt;<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US=
"><div class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordSecti=
on1"><div style=3D"border-color:currentcolor currentcolor currentcolor blue=
;border-style:none none none solid;border-width:medium medium medium 1.5pt;=
padding:0in 0in 0in 4pt"><div><div><div><span><div><p class=3D"MsoNormal"><=
u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal"><br>
11)=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from th=
e network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.<br>
<br>
Comment&gt; What is the specified strategy (you may want to give an example=
) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to add the follwoing text, but I am happy =
if you are willing to provide a more specific example.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">Upon receiving a request to mitigate a DDoS attack p=
erformed over a target, the orchestrator, may evaluate the volumetry of the=
 attack as well as the value that represent the target. Then it may also re=
quest an upstream DMS Provider to
 filter the traffic while moving the target to another network so new sessi=
ons will not be impacted.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] I don=E2=80=99t think moving the target =
to a different network is easy. However, the orchestrator may select the DD=
oS mitigation provider based on the attack severity.
<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0</p></div></span></div></div></div></div></div=
></div></blockquote><div>&lt;mglt&gt;</div><div>I agree MTD is not easy, bu=
t I wanted to stress that the orchestrator can be coordinate complex operat=
ions ,that is a bit more than delegating. I have added the following text:<=
/div><div><br></div><div>NEW:</div><div><span>Upon receiving a request to m=
itigate a DDoS attack performed over a
 target, the orchestrator, may evaluate the volumetry of the attack as=20
well as the value that represent the target. The orchestrator may select th=
e DDoS Mitigation Service=C2=A0 Provider based on the attack severity.
It may also coordinate the DDoS Mitigation performed by the <span>DDoS Miti=
gation Service=C2=A0 Provider with some other tasks such as for example,=C2=
=A0</span> moving the target to another network so new=20
sessions will not be impacted.</span><br></div><div><br></div><div><br></di=
v><div>&lt;/mglt&gt;<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-19071=
54065627156770WordSection1"><div style=3D"border-color:currentcolor current=
color currentcolor blue;border-style:none none none solid;border-width:medi=
um medium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><=
p class=3D"MsoNormal"><u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal"><br>
12)<br>
The status of the DDoS mitigation indicates the orchestrator is in an analy=
zing phase.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt; DOTS signal=
 channel draft does not indicate the mitigation status is in analyzing phas=
e (Please see &quot;Table 2: Values of &#39;status&#39; Parameter&quot; in =
the draft).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to remove: <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The status of the DDoS<br>
mitigation indicates the orchestrator is in an analyzing phase.<u></u><u></=
u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>=C2=A0&lt;mglt&gt;</div><div>Done</div><div=
>&lt;/mglt&gt;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><=
div lang=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-19071540656=
27156770WordSection1"><div style=3D"border-color:currentcolor currentcolor =
currentcolor blue;border-style:none none none solid;border-width:medium med=
ium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><p clas=
s=3D"MsoNormal"><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">13)<br>
The orchestrator begins collecting various information from various=C2=A0 t=
elemetry systems in order to correlate the measurements and provide=C2=A0 a=
n analysis of the event.<br>
Comment&gt; The orchestrator would anyway be collecting data from various t=
elemetry systems for correlation.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree. I think what I wanted to say that we may move=
 to a state where finer information is being monitored. I porposed the foll=
woing text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator begins collecting various informati=
on from various=C2=A0 telemetry systems in order to correlate the measureme=
nts and provide=C2=A0 an analysis of the event.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">The orchestrator may begin collecting additional fin=
ed grain and specific information from various=C2=A0 telemetry systems in o=
rder to correlate the measurements and provide an analysis of the event.<u>=
</u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] Okay. <u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>=C2=A0&lt;mglt&gt;</div><div>Done</div><div=
>&lt;/mglt&gt;<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><=
div lang=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-19071540656=
27156770WordSection1"><div style=3D"border-color:currentcolor currentcolor =
currentcolor blue;border-style:none none none solid;border-width:medium med=
ium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><p clas=
s=3D"MsoNormal"><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">14) These systems are c=
onfigured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<br>
<br>
Comment&gt; what do you mean by &quot;some measurement indicators&quot; and=
 &quot;specific reporting&quot; (looks vague to me) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">measurement indicators means to me, some variables t=
hat we believe representative for threat detection, this typically involved=
 the traffic load, the number of SYNs...Specific reporting here indicates w=
hat the DOTS client refers to while
 triggering teh DDoS Mitigation request. I propose teh follwointext:<u></u>=
<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 send DOTS mitigation request to the orchestrator.=C2=A0 The DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with additional informati=
on to let the orchestrator know what has triggered the request.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] Okay (Mitigation hints (=E2=80=9Cadditio=
nal information=E2=80=9D) are optional and is not mandatory to be conveyed =
in the mitigation request).<u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div><br></div><div>&lt;mglt&gt;</div><div><br><=
/div><div>Done</div><div><br></div><div>The following text has been added:<=
/div><div>These systems are configured so that when an event or some measur=
ement<br>indicators reach a predefined level to send DOTS mitigation reques=
t to<br>the orchestrator.=C2=A0 The DOTS mitigation request may be associat=
ed with<br>some optional mitigation hints to let the orchestrator know what=
 has <br>triggered the request.</div><div>&lt;/mglt&gt;</div><div><br></div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div=
 class=3D"gmail-m_-2328220809847430590m_-1907154065627156770WordSection1"><=
div style=3D"border-color:currentcolor currentcolor currentcolor blue;borde=
r-style:none none none solid;border-width:medium medium medium 1.5pt;paddin=
g:0in 0in 0in 4pt"><div><div><div><span><div><p class=3D"MsoNormal"><u></u>=
</p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">15) Figure 4 (DDoS Orch=
estration) includes both internal and external DDoS mitigation systems, but=
 the usage of internal and external DDoS mitigation systems in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple =
administrative domain use case. Why would multiple ISPs use the same orches=
trator ?<u></u><u></u></p>
</div><span>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></span></div></div></div></di=
v></div></div></blockquote><div>&lt;mglt&gt;</div><div>The use case conside=
rs teh following administrative domains: ITP and Enterprise Network. I prop=
ose to simply replace internal by Enterprise Network and external by ITP. <=
br></div><div> <br></div><div>&lt;/mglt&gt;<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204=
,204,204);padding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-2328=
220809847430590m_-1907154065627156770WordSection1"><div style=3D"border-col=
or:currentcolor currentcolor currentcolor blue;border-style:none none none =
solid;border-width:medium medium medium 1.5pt;padding:0in 0in 0in 4pt"><div=
><div><div><span><div><p class=3D"MsoNormal"><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">16) Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<br>
<br>
Comment&gt; You may want to clarify the scrubbed traffic is re-directed to =
the Enterprise network via the tunneling mechanism.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection to the enterprise network may be performed via tunne=
ling mechanisms such as GRE for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] DNS redirection and BGP routing are two =
different diversion techniques, DNS redirection is not required after BGP a=
nnouncement.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR]<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal"><span>Redirection to the DDoS<br>
Mitigation Service Provider typically involves BGP prefix<br></span>
announcement or DNS redirection, while re-injection of the scrubbed traffic=
 to the enterprise network may be performed via tunneling mechanisms such a=
s GRE for<br>
example.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br></p></blockquote></=
span></div></div></div></div></div></div></blockquote><div>&lt;mglt&gt;</di=
v><div>Done</div><div>&lt;/mglt&gt;</div><div><br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_=
-2328220809847430590m_-1907154065627156770WordSection1"><div style=3D"borde=
r-color:currentcolor currentcolor currentcolor blue;border-style:none none =
none solid;border-width:medium medium medium 1.5pt;padding:0in 0in 0in 4pt"=
><div><div><div><span><blockquote style=3D"border-color:currentcolor curren=
tcolor currentcolor rgb(204,204,204);border-style:none none none solid;bord=
er-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt=
;margin-right:0in"><p class=3D"MsoNormal" style=3D"margin-bottom:12pt">
17) Of course, such mechanisms needs to be regularly tested and<br>
=C2=A0 =C2=A0evaluated.<br>
<br>
Comment&gt; The above line does not look relevant to this document.<u></u><=
u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">I am fine removing it.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] Okay. <u></u><u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;</p></div></span></div></div></div></di=
v></div></div></blockquote><div>&lt;mglt&gt;</div><div>Done</div><div>&lt;/=
mglt&gt;</div><div><br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-2328220809847430590m_-190715=
4065627156770WordSection1"><div style=3D"border-color:currentcolor currentc=
olor currentcolor blue;border-style:none none none solid;border-width:mediu=
m medium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><span><div><p=
 class=3D"MsoNormal"><u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">18)=C2=A0 =C2=A0Once th=
e requesting Enterprise Network is confident that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; It&#39;s not clear how the requesting Enterprise network will l=
earn the DDoS attack has ceased ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
</span><div><span>
<p class=3D"MsoNormal">DOTS status may be used for example. I hope teh text=
 provided for (2) clarifies this.=C2=A0
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR] You may want to rephrase the above line =
similar to the new text you have provided for (2).<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><span>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt; <u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">______________________________<wbr>_________________=
<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/l<wbr>istinfo/dots</a><u></u><u></u></p>
</div>
</div>
</blockquote>
</span></div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>

<br>______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/dots</a><br>
<br></blockquote></div><br></div></div></div>

--000000000000238f50056f82bcd9--


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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/O2Eqf_92NeFpf_9FZ_RmZYAE9c0>
Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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From: Daniel Migault <daniel.migault@ericsson.com>
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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Hi Tiru,

Please see my response inline. I believe we are close to reaching a
consensus.

Yours,
Daniel

On Tue, Jun 26, 2018 at 7:02 AM, Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Daniel,
>
>
>
> Please see inline [TR2]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Tuesday, June 26, 2018 8:33 AM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi,
>
>
>
> Thanks for the feed backs. IN my opinion the only issues that remain open
> are issues 1 and 15 . These are copied below. I provided also inline the
> status of each issues - for further details. Once we are clear with these
> two issues, I will publish a new version.
>
>
>
> Thanks you very much for teh comments.
>
>
>
> Yours,
>
> Daniel
>
>
>
>
>
>
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
> <mglt>
>
> I understand your comment for the hints. These were example of informatio=
n
> provided. I agree to mention as GEN-004 that information is a hints that
> may be interpreted.
>
> What is not clear to me is that I do not see how volumetric attacks can b=
e
> addressed in this case. A volumetric attack whose target is in the
> Enterprise Network woudl be detected by the DMS of that Enterprise networ=
k.
> In that case the DMS of the Enterprise network will have a DOTS client
> sending a request to the DOTS Server of the ITP..  This is not the case w=
e
> consider here as it has already been described as the primary
> alternative.The reason for a ITP DMS to send a request to the DMS of the
> Enterprise could be 1) the Enterprise network is taking part of a DDoS
> atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS Enterprise
> network. I see 1) as informing that hosts of the network are being infect=
ed
> and being part of a botnet. I am confused by 2) as I see ITP DMS with way=
s
> more resource than the Enterprise network. Could you elaborate a bit on t=
he
> scenario ?
>
>
>
> [TR2] I meant don=E2=80=99t club incoming and outgoing attacks in the sam=
e use
> case, my suggestion is to focus only on the incoming volumetric attack in
> this use case.
>
> If you plan to discuss outgoing attack from the Enterprise network, pleas=
e
> add more details why the Enterprise DMS cannot detect the outgoing attack=
s
> and how will the additional information provided by the ITP DMS help the
> Enterprise DMS to detect outgoing DDoS attacks, and how this additional
> information is useful when the compromised hosts in the Enterprise networ=
ks
> are behind NAT ?
>
>
>
> </mglt>
>
<mglt3>
OK got it. Actually I added this use case after our discussion in the IETF.
I believe also its is going a bit beyong the volumetric attacks. I am ok
removing it. It has been removed on my local version.
</mglt3>

>
>
> 15) Figure 4 (DDoS Orchestration) includes both internal and external DDo=
S
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The use case considers the following administrative domains: ITP and
> Enterprise Network. I propose to simply replace "internal" by Enterprise
> Network and "external" by ITP.
>
>
>
> [TR2] Okay, but why would the upstream ITP and Enterprise network use the
> same orchestrator ?
>
> <mglt3>
The orchestrator is in the Enterprise Network
and decides between different DDoS Mitigation Serviec Provider. One of
those is hosted in the NEterprise NEtwork, the other one is in the ITP..
Sure they share the same orchestrator, but in my opinion that is the
otherway around, the orchestrator got access to multiple providers. How do
you think we should clarify this ?

The figure I am proposing is as below:

           +----------+
           | network  |C            (Enterprise Network)
           | adminis  |<-+
           | trator   |  |
           +----------+  |
                         |
           +----------+  | S+--------------+     +-----------+
           |telemetry/|  +->|              |C   S| DDoS      |+
           |monitoring|<--->| Orchestrator |<--->| mitigation||
           |systems   |C   S|              |<-+  | systems   ||
           +----------+     +--------------+C |  +-----------+|
                                              |    +----------+
           -----------------------------------|-----------------
                                              |
                                              |
              (Internet Transit Provider)     |
                                              |  +-----------+
                                              | S| DDoS      |
                                              +->| mitigation|
                                                 | systems   |
                                                 +-----------+
           * C is for DOTS client functionality
           * S is for DOTS server functionality

   Figure 4: DDoS Orchestration



</mglt3>

>
>
> -Tiru
>
>
>
> </mglt>
>
>
>
>
>
>
>
> On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
>
>
> Please see inline [TR]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Thursday, June 21, 2018 1:28 AM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
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> ------------------------------
>
> Hi Tiru,
>
>
>
> Thanks for the comments. Please see inline my responses. If the proposed
> text is fine to youI will update the draft and publish a new version by t=
he
> end of the week.
>
>
>
> Yours,
>
> Daniel
>
>
>
> On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
> My comments and nits
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
> <mglt>
>
> I understand your comment. These were example of information provided. I
> agree to mention as GEN-004 that information is a hints that may be
> interpreted. I do not see how volumetric attacks can be addressed in this
> case. A volumetric attack whose target is in the Entreprise Network woudl
> be detected by the DMS of that Enterprise network. In that case the DMS o=
f
> the Enterprise network will have a DOTS client sending a request to the
> DOTS Server of the ITP..  This is not the case we consider here as it has
> already been described as the primary alternative.The reason for a ITP DM=
S
> to send a request to the DMS of the Enterprise could be 1) the Enterprise
> network is taking part of a DDoS atatck, 2) the ITP DMS delegate the DDoS
> mitigation to the DMS Enterprise network. I see 1) as informing that host=
s
> of the network are being infected and being part of a botnet. I am confus=
ed
> by 2) as I see ITP DMS with ways more resource than the Enterprise networ=
k.
> Could you elaborate a bit on the scenario you have in mind ?
>
>
>
> </mglt>
>
>
> 2)
>    Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> In the above line, I don't get "that it has received a DOTS DDoS
> Mitigation termination request from a downstream Enterprise Network or DD=
oS
> Mitigation Service Provider".
> I think you mean "or notified by the DDoS Mitigation Service Provider tha=
t
> the DDoS attack has stopped"
>
>
>
> <mglt>
>
> The text attempt to provide reasons for a DOTS Client to send a DOTS DDoS
> Mitigation termination request. It could be that a) information received
> from the upstream DMS indicates the attacks has been stopped or that the
> attack is sufficiently low so that it can handle the attack on its own. O=
n
> the other hand, in the case of collaboration between DMS, a DMS may end t=
he
> collaboration with an upstream DMS because the downstream DMS has request=
ed
> so. I propose the follwoing clarification, please let me know if that is
> fine with you:
>
>
>
>
>
> OLD:
>
> Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
>
>
> NEW:
>
> Once the requesting Enterprise Network has been notified by the DDoS
> Mitigation Service
>    Provider. the attack has been stopped, or that the level of the attack
> has fallen to levels of traffic/
>    complexity which they can handle on their own, the Enterprise Network
> may notify the DDoS Mitigation Service Provider to stop the DDoS
> Mitigation.
>
>
>
>
>
> [TR] You may want to simplify the above text as follows :
>
> The DOTS server notifies the mitigation metrics to the DOTS client. If th=
e
> DDoS attack has stopped or the severity of the attack has subsided, the
> DOTS client can request the DDoS Mitigation Service Provider to stop the
> DDoS Mitigation.
>
>
>
>
>
> Similarly, when DDoS Mitigation Service Providers are collaborating, a
> DDoS Mitigation Service Provider may relay the request for terminating a
> DDoS MItigation to the upstream DoS Mitigation Service Provider upon
> request from a downstream  DoS Mitigation Service Provider. In any case t=
he
> termination of a DDoS Mitigation is requested by the Network Enterprise
> DOTS client sending a DOTS DDoS Mitigation termination request to the DDo=
S
> Mitigation Service Provider.
>
>
>
> [TR] I am not sure about the above lines, DDoS mitigation service
> providers collaborating with each other does not look relevant to this us=
e
> case. You may want to remove the above lines.
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The reason for mentioning the collaboration was to indicate there are
> multiple reasons to stop the mitigation. You can be the one deciding give=
n
> the status provided or your can can do that because you have been asked t=
o
> do it. I am fine removing the latest case. Done.
>
>
>
> </mglt>
>
> 3)
>
>    The pre-arrangement typically includes the agreement on the
>    mechanisms used to redirect the traffic to the DDoS Mitigation
>    Service Provider, as well as the mechanism to to re-inject the
>
>  >>>>>>>>>>>>>>>>>>>>>>>>>>> Remove "to"
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
> 4)
>
>    o  DDoS Mitigation Service: designates a DDoS service provided to a
>       customer and which is scoped to mitigate DDoS attacks.  Services
>       usually involve Service Level Agreement (SLA) that have to be met.
>       It is the responsibility of the service provider to instantiate
>       the DDoS Mitigation System to meet these SLAs.
>
>    o  DDoS Mitigation System (DMS): A system that performs DDoS
>       mitigation.  The DDoS Mitigation System may be composed by a
>       cluster of hardware and/or software resources, but could also
>       involve an orchestrator that may take decisions such as
>       outsourcing partial or more of the mitigation to another DDoS
>       Mitigation System.
>
> Nit> For better readability you may want to define "DMS" followed by "DDo=
S
> Mitigation Service"
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
>
> 5)
>    DOTS is at risk from three primary attacks: DOTS agent impersonation,
>    traffic injection, and signaling blocking.  The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> Comment> A MITM attacker can drop all the DOTS signal channel traffic,
> designing the DOTS signal channel protocol for minimal data
> transfer will not address the MITM attack.
>
>
>
> <mglt>
>
>  Agree. I propose to remove:
>
> """
>
> The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> """
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
>
> 6)
>    One consideration could be to minimize the security technologies in us=
e
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> Comment> The DOTS signal and data channels are using TLS for mutual
> authentication, confidentiality and data integrity. I don't see the need
> for the above lines.
>
> <mglt>
>
> Agree.  I propose to remove the following lines:
>
> """
>
>  One consideration could be to minimize the security technologies in use
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> """
>
>
>
> </mglt>
>
>
>
> [TR] Okay.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
> 7)
>    When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
> Comment> I think you mean the DDoS attack has stopped. You may want to
> rephrase the line.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
>
>
> NEW:
>
> When the DDoS attack has stopped, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the end of the DDoS Mitigation.
>
> </mglt>
>
>
>
> [TR] Looks good.
>
> <mglt>
>
> done
>
> </mglt>
>
>
>
> 8)
>    Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
> Comment> You may want to clarify the DOTS client will later be notified
> that the DDoS mitigation is effective.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
>
>
> NEW:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS Mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    Mitigation is starting while not effective. The DOTS client of the
> orchestrator will later be notified that the DDoS Mitigation is effective=
.
>
>
>
> [TR] Looks good.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
>
>
>
>
> </mglt>
>
>
> 9) If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
> Nit> The above line is not clear, who are "they" in the above line ?
>
> <mglt>
>
> I propose the followin text:
>
>
>
> OLD:
>
> If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
>
>
> NEW:
>
> If the network administrator decides to start the
>    mitigation, the network administrator orders through her web interface
> a DOTS client to
>    send a request for DDoS mitigation.
>
> </mglt>
>
>
>
> [TR] You may want to remove gender from the above line and simplify the
> text.
>
> NEW:
>
> If the network administrator decides to start the
> mitigation, the network administrator triggers the DDoS mitigation reques=
t
> using the web interface of a DOTS client.
>
>
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
> 10) This request is expected to be associated with a context that
> identifies the DDoS mitigation selected.
>
> Comment> I don't understand the context of the above line.
>
>
>
> <mg;t>
>
> The context constitutes of elements, indications that provides sufficient
> information to the orchestrator to know what needs to be done. in other
> words, the DDoS Mitigation.
>
> I propose the following text:
>
>
>
> OLD:
>
> This request is expected to be associated with a context that identifies
> the DDoS mitigation selected.
>
>
>
> NEW:
>
> This request is expected to be associated with a context that identifies
> or provide sufficient information to the orchestrator to in fer the DDoS
> Mitigation to elaborate and coordinate.
>
>
>
> [TR] NEW:
>
> This request is expected to be associated with a context that provides
> sufficient information to the orchestrator to infer the DDoS Mitigation t=
o
> elaborate and coordinate.
>
>
>
>
>
> </mglt>
>
>
>
> <mglt
>
> done
>
> </mglt>
>
>
> 11)   Upon receiving the DOTS request for DDoS mitigation from the networ=
k
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.
>
> Comment> What is the specified strategy (you may want to give an example)=
 ?
>
> <mglt>
>
> I propose to add the follwoing text, but I am happy if you are willing to
> provide a more specific example.
>
>
>
> NEW:
>
> Upon receiving a request to mitigate a DDoS attack performed over a
> target, the orchestrator, may evaluate the volumetry of the attack as wel=
l
> as the value that represent the target. Then it may also request an
> upstream DMS Provider to filter the traffic while moving the target to
> another network so new sessions will not be impacted.
>
>
>
> [TR] I don=E2=80=99t think moving the target to a different network is ea=
sy.
> However, the orchestrator may select the DDoS mitigation provider based o=
n
> the attack severity.
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> I agree MTD is not easy, but I wanted to stress that the orchestrator can
> be coordinate complex operations ,that is a bit more than delegating. I
> have added the following text:
>
>
>
> NEW:
>
> Upon receiving a request to mitigate a DDoS attack performed over a
> target, the orchestrator, may evaluate the volumetry of the attack as wel=
l
> as the value that represent the target. The orchestrator may select the
> DDoS Mitigation Service  Provider based on the attack severity. It may al=
so
> coordinate the DDoS Mitigation performed by the DDoS Mitigation Service
> Provider with some other tasks such as for example,  moving the target to
> another network so new sessions will not be impacted.
>
>
>
>
>
> </mglt>
>
>
> 12)
> The status of the DDoS mitigation indicates the orchestrator is in an
> analyzing phase.
>
>
>
> Comment> DOTS signal channel draft does not indicate the mitigation statu=
s
> is in analyzing phase (Please see "Table 2: Values of 'status' Parameter"
> in the draft).
>
> <mglt>
>
> I propose to remove:
>
>
>
> """
>
> The status of the DDoS
> mitigation indicates the orchestrator is in an analyzing phase.
>
> """
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
>  <mglt>
>
> Done
>
> </mglt>
>
> 13)
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
> Comment> The orchestrator would anyway be collecting data from various
> telemetry systems for correlation.
>
> <mglt>
>
> Agree. I think what I wanted to say that we may move to a state where
> finer information is being monitored. I porposed the follwoing text:
>
>
>
> OLD:
>
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
>
>
>
> NEW:
>
> The orchestrator may begin collecting additional fined grain and specific
> information from various  telemetry systems in order to correlate the
> measurements and provide an analysis of the event.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
>
>
>  <mglt>
>
> Done
>
> </mglt>
>
> 14) These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
> Comment> what do you mean by "some measurement indicators" and "specific
> reporting" (looks vague to me) ?
>
> <mglt>
>
>
>
> measurement indicators means to me, some variables that we believe
> representative for threat detection, this typically involved the traffic
> load, the number of SYNs...Specific reporting here indicates what the DOT=
S
> client refers to while triggering teh DDoS Mitigation request. I propose
> teh follwointext:
>
>
>
> OLD:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
>
>
> NEW:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>   send DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with additional information to le=
t
> the orchestrator know what has triggered the request.
>
>
>
> [TR] Okay (Mitigation hints (=E2=80=9Cadditional information=E2=80=9D) ar=
e optional and is
> not mandatory to be conveyed in the mitigation request).
>
>
>
> </mglt>
>
>
>
>
>
> <mglt>
>
>
>
> Done
>
>
>
> The following text has been added:
>
> These systems are configured so that when an event or some measurement
> indicators reach a predefined level to send DOTS mitigation request to
> the orchestrator.  The DOTS mitigation request may be associated with
> some optional mitigation hints to let the orchestrator know what has
> triggered the request.
>
> </mglt>
>
>
>
> 15) Figure 4 (DDoS Orchestration) includes both internal and external DDo=
S
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The use case considers teh following administrative domains: ITP and
> Enterprise Network. I propose to simply replace internal by Enterprise
> Network and external by ITP.
>
>
>
> </mglt>
>
> 16) Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
> Comment> You may want to clarify the scrubbed traffic is re-directed to
> the Enterprise network via the tunneling mechanism.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
>
>
> NEW:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection to the enterprise network may be performed via tunneling
> mechanisms such as GRE for
>    example.
>
>
>
> [TR] DNS redirection and BGP routing are two different diversion
> techniques, DNS redirection is not required after BGP announcement.
>
>
>
> [TR]
>
> NEW:
>
> Redirection to the DDoS
> Mitigation Service Provider typically involves BGP prefix
> announcement or DNS redirection, while re-injection of the scrubbed
> traffic to the enterprise network may be performed via tunneling mechanis=
ms
> such as GRE for
> example.
>
>
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> 17) Of course, such mechanisms needs to be regularly tested and
>    evaluated.
>
> Comment> The above line does not look relevant to this document.
>
> <mglt>
>
>
>
> I am fine removing it.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
>
>
> 18)   Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> It's not clear how the requesting Enterprise network will learn
> the DDoS attack has ceased ?
>
> <mglt>
>
> DOTS status may be used for example. I hope teh text provided for (2)
> clarifies this.
>
>
>
> [TR] You may want to rephrase the above line similar to the new text you
> have provided for (2).
>
>
>
> Cheers,
>
> -Tiru
>
>
>
> </mglt>
>
> -Tiru
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>

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<div dir=3D"ltr"><div>Hi Tiru, <br></div><div><br></div><div>Please see my =
response inline. I believe we are close to reaching a consensus. <br></div>=
<div><br></div><div>Yours, <br></div><div>Daniel<br></div><div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Jun 26, 2018 at 7:0=
2 AM, Konda, Tirumaleswar Reddy <span dir=3D"ltr">&lt;<a href=3D"mailto:Tir=
umaleswarReddy_Konda@mcafee.com" target=3D"_blank">TirumaleswarReddy_Konda@=
mcafee.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-8114943169792688912WordSection1">
<p class=3D"MsoNormal">Hi Daniel,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Please see inline [TR2]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-8114943169792688912__MailEndCompose"><=
u></u>=C2=A0<u></u></a></p>
<span></span>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;borde=
r-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in"=
>
<p class=3D"MsoNormal"><span class=3D"gmail-"><b>From:</b> <a href=3D"mailt=
o:mglt.ietf@gmail.com" target=3D"_blank">mglt.ietf@gmail.com</a> [mailto:<a=
 href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt.ietf@gmail.com<=
/a>]
<b>On Behalf Of </b>Daniel Migault<br>
</span><b>Sent:</b> Tuesday, June 26, 2018 8:33 AM<span class=3D"gmail-"><b=
r>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@<wbr>McAfe=
e.com&gt;<br>
<b>Cc:</b> Tobias Gondrom &lt;<a href=3D"mailto:tobias.gondrom@gondrom.org"=
 target=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a=
 href=3D"mailto:rdd@cert.org" target=3D"_blank">rdd@cert.org</a>&gt;; <a hr=
ef=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
<b>Subject:</b> Re: [Dots] WGLC for use cases draft - until July-1.<u></u><=
u></u></span></p>
</div>
</div><span class=3D"gmail-">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"gmail-m_-8114943169792688912MsoNormalTable" style=3D"backgr=
ound:rgb(243,255,51) none repeat scroll 0% 0%;border:1.5pt solid rgb(155,15=
4,135)" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:medium none;padding:0.75pt">
<p><b><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:rgb(155=
,139,62)">CAUTION</span></b><span style=3D"font-family:&quot;Arial&quot;,sa=
ns-serif;color:rgb(155,139,62)">:</span><span style=3D"font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"> External email. Do not click links or op=
en
 attachments unless you recognize the sender and know the content is safe.<=
/span><span style=3D"font-family:&quot;Arial&quot;,sans-serif"><u></u><u></=
u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
</span><div>
<div>
<p class=3D"MsoNormal">Hi, <u></u><u></u></p>
</div><div><div class=3D"gmail-h5">
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the feed backs. IN my opinion the only is=
sues that remain open are issues 1 and 15 . These are copied below. I provi=
ded also inline the status of each issues - for further details. Once we ar=
e clear with these two issues, I will
 publish a new version. <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks you very much for teh comments. <u></u><u></u=
></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours, <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div><div><div><div class=3D"gmail-h5">
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt;=C2=A0 If th=
e DMS in the enterprise network is not capable of detecting outgoing DDoS a=
ttack, how will the signaling from the DOTS client in the upstream ITP to t=
he DOTS server in
 the enterprise network help it to detect and mitigate the outgoing DDoS at=
tack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in mind=
 was that the ITP could signal the network enterprise that some hosts are b=
eing infected and belonging to a botnet. The ITP could
 provide a list of suspicious tagged IPv6 or the indication that hosts are =
suspected to belong to a specific botnet. =C2=A0
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary a=
ction, monitoring specific DNS requests, running specific scans over its ho=
sts... At least this what I had in mind. The specific
 signaling should be defined by DOTS. Do you think the text should be updat=
ed as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the tagg=
ed hosts as well as instantiating specific monitoring traffic elements such=
 as certain type of DNS queries, traffic of specific destination...=C2=A0 I=
n some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[TR] The above text is =
not completely clear. The above text assumes hosts in the enterprise networ=
k are not behind NAT. Further, DMS in the enterprise network should be moni=
toring both
 incoming and outgoing traffic and capable of detecting outgoing DDoS attac=
ks. I think the use case should only focus on volumetric attack exceeding t=
he capacity of the DMS in the Enterprise network and not discuss multiple a=
ttack vectors (You may also want
 to look into the requirement GEN-004 (Mitigation hinting) in the requireme=
nts draft).
<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I understand your comment for the hints. These were =
example of information provided. I agree to mention as GEN-004 that informa=
tion is a hints that may be interpreted.
<u></u><u></u></p>
</div>
</div></div><div><div><div class=3D"gmail-h5">
<p class=3D"MsoNormal">What is not clear to me is that I do not see how vol=
umetric attacks can be addressed in this case. A volumetric attack whose ta=
rget is in the Enterprise Network woudl be detected by the DMS of that Ente=
rprise network. In that case the DMS
 of the Enterprise network will have a DOTS client sending a request to the=
 DOTS Server of the ITP..=C2=A0 This is not the case we consider here as it=
 has already been described as the primary alternative.The reason for a ITP=
 DMS to send a request to the DMS of
 the Enterprise could be 1) the Enterprise network is taking part of a DDoS=
 atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS Enterprise =
network. I see 1) as informing that hosts of the network are being infected=
 and being part of a botnet. I am
 confused by 2) as I see ITP DMS with ways more resource than the Enterpris=
e network. Could you elaborate a bit on the scenario ?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div></div><p class=3D"MsoNormal">[TR2] I meant don=E2=80=99t club incomin=
g and outgoing attacks in the same use case, my suggestion is to focus only=
 on the incoming volumetric attack in this use case.
<u></u><u></u></p>
<p class=3D"MsoNormal">If you plan to discuss outgoing attack from the Ente=
rprise network, please add more details why the Enterprise DMS cannot detec=
t the outgoing attacks and how will the additional information provided by =
the ITP DMS help the Enterprise DMS
 to detect outgoing DDoS attacks, and how this additional information is us=
eful when the compromised hosts in the Enterprise networks are behind NAT ?=
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;</p></div></div></div></div></div></div=
></blockquote><div>&lt;mglt3&gt;</div><div>OK got it. Actually I added this=
 use case after our discussion in the IETF. I believe also its is going a b=
it beyong the volumetric attacks. I am ok removing it. It has been removed =
on my local version. <br></div><div>&lt;/mglt3&gt;<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-=
m_-8114943169792688912WordSection1"><div style=3D"border-color:currentcolor=
 currentcolor currentcolor blue;border-style:none none none solid;border-wi=
dth:medium medium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div><div><p c=
lass=3D"MsoNormal"><u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div><span class=3D"gmail-">
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">15) Figure 4 (DDoS Orch=
estration) includes both internal and external DDoS mitigation systems, but=
 the usage of internal and external DDoS mitigation systems in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple adminis=
trative domain use case. Why would multiple ISPs use the same orchestrator =
?<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
</span><div><span class=3D"gmail-">
<p class=3D"MsoNormal">The use case considers the following administrative =
domains: ITP and Enterprise Network. I propose to simply replace &quot;inte=
rnal&quot; by Enterprise Network and &quot;external&quot; by ITP.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</span><p class=3D"MsoNormal">[TR2] Okay, but why would the upstream ITP an=
d Enterprise network use the same orchestrator ?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u></p></div></div></div></div></div></div></blo=
ckquote><div>&lt;mglt3&gt;</div><div>The orchestrator is in the Enterprise =
Network <br></div><div>and decides between different DDoS Mitigation Servie=
c Provider. One of those is hosted in the NEterprise NEtwork, the other one=
 is in the ITP.. Sure they share the same orchestrator, but in my opinion t=
hat is the otherway around, the orchestrator got access to multiple provide=
rs. How do you think we should clarify this ?</div><div><br> </div><div>The=
 figure I am proposing is as below:</div><div><br></div><div><span style=3D=
"font-family:monospace,monospace">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 +----------+<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 | network=C2=A0 |C=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (Enterprise Network)<br>=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | adminis=C2=A0 |&lt;-+<br=
>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | trator=C2=
=A0=C2=A0 |=C2=A0 |<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 +----------+=C2=A0 |<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 <br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 +----------+=C2=A0 | S+--------------+=C2=A0=C2=A0=C2=A0=C2=A0 +----=
-------+<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |t=
elemetry/|=C2=A0 +-&gt;|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 |C=C2=A0=C2=A0 S| DDoS=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 |+<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=
monitoring|&lt;---&gt;| Orchestrator |&lt;---&gt;| mitigation||<br>=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |systems=C2=A0=C2=A0=
 |C=C2=A0=C2=A0 S|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 |&lt;-+=C2=A0 | systems=C2=A0=C2=A0 ||<br>=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----------+=C2=A0=C2=
=A0=C2=A0=C2=A0 +--------------+C |=C2=A0 +-----------+|<br>=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0 +----------+<br>=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 --------------------=
---------------|-----------------<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 |<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |<br>=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (Inte=
rnet Transit Provider)=C2=A0=C2=A0=C2=A0=C2=A0 |<br>=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +-----------+<br>=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 | S| DDoS=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |<br>=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +-&gt;| mitigation|<br>=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | systems=C2=A0=C2=A0 |=
<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----=
-------+<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 * =
C is for DOTS client functionality</span><br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 * S is for DOTS server functionality<br><br>=
=C2=A0=C2=A0 Figure 4: DDoS Orchestration<br><br><br></div><div><br></div><=
div>&lt;/mglt3&gt;<br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x"><div lang=3D"EN-US"><div class=3D"gmail-m_-8114943169792688912WordSectio=
n1"><div style=3D"border-color:currentcolor currentcolor currentcolor blue;=
border-style:none none none solid;border-width:medium medium medium 1.5pt;p=
adding:0in 0in 0in 4pt"><div><div><div><p class=3D"MsoNormal">=C2=A0<u></u>=
</p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div><div><div class=3D"gmail-h5">
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal">Hi Daniel,
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Please see inline [TR]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-8114943169792688912_m_-232822080984743=
0590_m_-19071540656271">=C2=A0</a><u></u><u></u></p>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div style=3D"border-color:currentcolor;border-style:solid none none;border=
-width:1pt medium medium;padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b>
<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt.ietf@gmail.co=
m</a> [mailto:<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt=
.ietf@gmail.com</a>]
<b>On Behalf Of </b>Daniel Migault<br>
<b>Sent:</b> Thursday, June 21, 2018 1:28 AM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@McAfe<a hr=
ef=3D"http://e.com" target=3D"_blank"><wbr>e.com</a>&gt;<br>
<b>Cc:</b> Tobias Gondrom &lt;<a href=3D"mailto:tobias.gondrom@gondrom.org"=
 target=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a=
 href=3D"mailto:rdd@cert.org" target=3D"_blank">rdd@cert.org</a>&gt;;
<a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
<b>Subject:</b> Re: [Dots] WGLC for use cases draft - until July-1.<u></u><=
u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<table class=3D"gmail-m_-8114943169792688912MsoNormalTable" style=3D"backgr=
ound:rgb(243,255,51) none repeat scroll 0% 0%;border:1.5pt solid rgb(155,15=
4,135)" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:medium none;padding:0.75pt">
<p><b><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:rgb(155=
,139,62)">CAUTION</span></b><span style=3D"font-family:&quot;Arial&quot;,sa=
ns-serif;color:rgb(155,139,62)">:</span><span style=3D"font-family:&quot;Ar=
ial&quot;,sans-serif;color:black"> External email. Do not click links or op=
en attachments
 unless you recognize the sender and know the content is safe.</span><u></u=
><u></u></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru,
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the comments. Please see inline my respon=
ses. If the proposed text is fine to youI will update the draft and publish=
 a new version by the end of the week.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours,
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<div>
<p class=3D"MsoNormal">On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Hi Daniel,<br>
<br>
My comments and nits<br>
<br>
1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt;=C2=A0 If th=
e DMS in the enterprise network is not capable of detecting outgoing DDoS a=
ttack, how will the signaling from the DOTS client in the upstream ITP to t=
he DOTS server in
 the enterprise network help it to detect and mitigate the outgoing DDoS at=
tack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in mind=
 was that the ITP could signal the network enterprise that some hosts are b=
eing infected and belonging to a botnet. The ITP could
 provide a list of suspicious tagged IPv6 or the indication that hosts are =
suspected to belong to a specific botnet. =C2=A0
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary a=
ction, monitoring specific DNS requests, running specific scans over its ho=
sts... At least this what I had in mind. The specific
 signaling should be defined by DOTS. Do you think the text should be updat=
ed as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[...] The enterprise ne=
twork is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the tagg=
ed hosts as well as instantiating specific monitoring traffic elements such=
 as certain type of DNS queries, traffic of specific destination...=C2=A0 I=
n some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">[TR] The above text is =
not completely clear. The above text assumes hosts in the enterprise networ=
k are not behind NAT. Further, DMS in the enterprise network should be moni=
toring both
 incoming and outgoing traffic and capable of detecting outgoing DDoS attac=
ks. I think the use case should only focus on volumetric attack exceeding t=
he capacity of the DMS in the Enterprise network and not discuss multiple a=
ttack vectors (You may also want
 to look into the requirement GEN-004 (Mitigation hinting) in the requireme=
nts draft).
<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I understand your comment. These were example of inf=
ormation provided. I agree to mention as GEN-004 that information is a hint=
s that may be interpreted. I do not see how volumetric attacks can be addre=
ssed in this case. A volumetric attack
 whose target is in the Entreprise Network woudl be detected by the DMS of =
that Enterprise network. In that case the DMS of the Enterprise network wil=
l have a DOTS client sending a request to the DOTS Server of the ITP..=C2=
=A0 This is not the case we consider here
 as it has already been described as the primary alternative.The reason for=
 a ITP DMS to send a request to the DMS of the Enterprise could be 1) the E=
nterprise network is taking part of a DDoS atatck, 2) the ITP DMS delegate =
the DDoS mitigation to the DMS Enterprise
 network. I see 1) as informing that hosts of the network are being infecte=
d and being part of a botnet. I am confused by 2) as I see ITP DMS with way=
s more resource than the Enterprise network. Could you elaborate a bit on t=
he scenario you have in mind ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
2)<br>
=C2=A0 =C2=A0Once the requesting Enterprise Network is confident that the D=
DoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; In the above line, I don&#39;t get &quot;that it has received a=
 DOTS DDoS Mitigation termination request from a downstream Enterprise Netw=
ork or DDoS Mitigation Service Provider&quot;.<br>
I think you mean &quot;or notified by the DDoS Mitigation Service Provider =
that the DDoS attack has stopped&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The text attempt to provide reasons for a DOTS Clien=
t to send a DOTS DDoS Mitigation termination request. It could be that a) i=
nformation received from the upstream DMS indicates
 the attacks has been stopped or that the attack is sufficiently low so tha=
t it can handle the attack on its own. On the other hand, in the case of co=
llaboration between DMS, a DMS may end the collaboration with an upstream D=
MS because the downstream DMS has
 requested so. I propose the follwoing clarification, please let me know if=
 that is fine with you:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Once the requesting Enterprise Network is confident =
that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Once the requesting Enterprise Network has been noti=
fied by the DDoS Mitigation Service<br>
=C2=A0 =C2=A0Provider. the attack has been stopped, or that the level of th=
e attack has fallen to levels of traffic/<br>
=C2=A0 =C2=A0complexity which they can handle on their own, the Enterprise =
Network may notify the DDoS Mitigation Service Provider to stop the DDoS Mi=
tigation.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">[TR] You may want to simplify the above text as foll=
ows :<u></u><u></u></p>
<p class=3D"MsoNormal">The DOTS server notifies the mitigation metrics to t=
he DOTS client. If the DDoS attack has stopped or the severity of the attac=
k has subsided, the DOTS client can request the DDoS
 Mitigation Service Provider to stop the DDoS Mitigation.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Similarly, when DDoS Mitigation Service Providers ar=
e collaborating, a DDoS Mitigation Service Provider may relay the request f=
or terminating a DDoS MItigation to the upstream=C2=A0DoS
 Mitigation Service Provider upon request from a downstream=C2=A0 DoS Mitig=
ation Service Provider. In any case the termination of a DDoS Mitigation is=
 requested by the Network Enterprise DOTS client sending a DOTS DDoS Mitiga=
tion termination request to the DDoS
 Mitigation Service Provider.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I am not sure about the above lines, DDoS mitig=
ation service providers collaborating with each other does not look relevan=
t to this use case. You may want to remove the above
 lines. <u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The reason for mentioning the collaboration was to i=
ndicate there are multiple reasons to stop the mitigation. You can be the o=
ne deciding given the status provided or your can can do that because you h=
ave been asked to do it. I am fine
 removing the latest case. Done.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">3)<br>
<br>
=C2=A0 =C2=A0The pre-arrangement typically includes the agreement on the<br=
>
=C2=A0 =C2=A0mechanisms used to redirect the traffic to the DDoS Mitigation=
<br>
=C2=A0 =C2=A0Service Provider, as well as the mechanism to to re-inject the=
<br>
<br>
=C2=A0&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&=
gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; Remove &quot;to&quot;<u></u><u></u>=
</p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">4)<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation Service: designates a DDoS service pro=
vided to a<br>
=C2=A0 =C2=A0 =C2=A0 customer and which is scoped to mitigate DDoS attacks.=
=C2=A0 Services<br>
=C2=A0 =C2=A0 =C2=A0 usually involve Service Level Agreement (SLA) that hav=
e to be met.<br>
=C2=A0 =C2=A0 =C2=A0 It is the responsibility of the service provider to in=
stantiate<br>
=C2=A0 =C2=A0 =C2=A0 the DDoS Mitigation System to meet these SLAs.<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation System (DMS): A system that performs D=
DoS<br>
=C2=A0 =C2=A0 =C2=A0 mitigation.=C2=A0 The DDoS Mitigation System may be co=
mposed by a<br>
=C2=A0 =C2=A0 =C2=A0 cluster of hardware and/or software resources, but cou=
ld also<br>
=C2=A0 =C2=A0 =C2=A0 involve an orchestrator that may take decisions such a=
s<br>
=C2=A0 =C2=A0 =C2=A0 outsourcing partial or more of the mitigation to anoth=
er DDoS<br>
=C2=A0 =C2=A0 =C2=A0 Mitigation System.<br>
<br>
Nit&gt; For better readability you may want to define &quot;DMS&quot; follo=
wed by &quot;DDoS Mitigation Service&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal"><br>
5)<br>
=C2=A0 =C2=A0DOTS is at risk from three primary attacks: DOTS agent imperso=
nation,<br>
=C2=A0 =C2=A0traffic injection, and signaling blocking.=C2=A0 The DOTS prot=
ocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<br>
<br>
Comment&gt; A MITM attacker can drop all the DOTS signal channel traffic, d=
esigning the DOTS signal channel protocol for minimal data
<br>
transfer will not address the MITM attack.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0Agree. I propose to remove:
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The DOTS protocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
6)<br>
=C2=A0 =C2=A0One consideration could be to minimize the security technologi=
es in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<br>
<br>
Comment&gt; The DOTS signal and data channels are using TLS for mutual auth=
entication, confidentiality and data integrity. I don&#39;t see the need fo=
r the above lines.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree.=C2=A0 I propose to remove the following lines=
:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0One consideration could be to minimize the sec=
urity technologies in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">7)<br>
=C2=A0 =C2=A0When the DDoS mitigation is finished on the DMS, the orchestra=
tor<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<br>
<br>
Comment&gt; I think you mean the DDoS attack has stopped. You may want to r=
ephrase the line.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS mitigation is finished on the DMS, the=
 orchestrator<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<u></u><u></u></=
p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS attack has stopped, the orchestrator<b=
r>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the end of the DDoS Mitigation.<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Looks good.
<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">8)<br>
=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from the n=
etwork<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<br>
<br>
Comment&gt; You may want to clarify the DOTS client will later be notified =
that the DDoS mitigation is effective.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS Mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0=C2=A0 Mitigation is starting while not effective. The DOTS client of=
 the orchestrator will later be notified that the DDoS Mitigation is effect=
ive.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Looks good.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
9) If the network administrator decides to start the<br>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <br>
<br>
Nit&gt; The above line is not clear, who are &quot;they&quot; in the above =
line ? <u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the followin text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0=C2=A0<u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, the network administrator orders through her web i=
nterface a DOTS client to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] You may want to remove gender from the above li=
ne and simplify the text.
<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
mitigation, the network administrator triggers the DDoS mitigation request =
using the web interface of a DOTS client.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">10) This request is expected to be associated with a=
 context that identifies the DDoS mitigation selected.<br>
<br>
Comment&gt; I don&#39;t understand the context of the above line.<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mg;t&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The context constitutes of elements, indications tha=
t provides sufficient information to the orchestrator to know what needs to=
 be done. in other words, the DDoS Mitigation.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies the DDoS mitigation selected.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies or provide sufficient information to the orchestrator =
to in fer the DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that provides sufficient information to the orchestrator to infer the =
DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal"><br>
11)=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from th=
e network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.<br>
<br>
Comment&gt; What is the specified strategy (you may want to give an example=
) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to add the follwoing text, but I am happy =
if you are willing to provide a more specific example.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving a request to mitigate a DDoS attack p=
erformed over a target, the orchestrator, may evaluate the volumetry of the=
 attack as well as the value that represent the target.
 Then it may also request an upstream DMS Provider to filter the traffic wh=
ile moving the target to another network so new sessions will not be impact=
ed.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t think moving the target to a di=
fferent network is easy. However, the orchestrator may select the DDoS miti=
gation provider based on the attack severity.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I agree MTD is not easy, but I wanted to stress that=
 the orchestrator can be coordinate complex operations ,that is a bit more =
than delegating. I have added the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving a request to mitigate a DDoS attack p=
erformed over a target, the orchestrator, may evaluate the volumetry of the=
 attack as well as the value that represent the target. The orchestrator ma=
y select the DDoS Mitigation Service=C2=A0
 Provider based on the attack severity. It may also coordinate the DDoS Mit=
igation performed by the DDoS Mitigation Service=C2=A0 Provider with some o=
ther tasks such as for example,=C2=A0 moving the target to another network =
so new sessions will not be impacted.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal"><br>
12)<br>
The status of the DDoS mitigation indicates the orchestrator is in an analy=
zing phase.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">Comment&gt; DOTS signal=
 channel draft does not indicate the mitigation status is in analyzing phas=
e (Please see &quot;Table 2: Values of &#39;status&#39; Parameter&quot; in =
the draft).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to remove:
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The status of the DDoS<br>
mitigation indicates the orchestrator is in an analyzing phase.<u></u><u></=
u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">13)<br>
The orchestrator begins collecting various information from various=C2=A0 t=
elemetry systems in order to correlate the measurements and provide=C2=A0 a=
n analysis of the event.<br>
Comment&gt; The orchestrator would anyway be collecting data from various t=
elemetry systems for correlation.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree. I think what I wanted to say that we may move=
 to a state where finer information is being monitored. I porposed the foll=
woing text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator begins collecting various informati=
on from various=C2=A0 telemetry systems in order to correlate the measureme=
nts and provide=C2=A0 an analysis of the event.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator may begin collecting additional fin=
ed grain and specific information from various=C2=A0 telemetry systems in o=
rder to correlate the measurements and provide an analysis
 of the event.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">14) These systems are c=
onfigured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<br>
<br>
Comment&gt; what do you mean by &quot;some measurement indicators&quot; and=
 &quot;specific reporting&quot; (looks vague to me) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">measurement indicators means to me, some variables t=
hat we believe representative for threat detection, this typically involved=
 the traffic load, the number of SYNs...Specific reporting
 here indicates what the DOTS client refers to while triggering teh DDoS Mi=
tigation request. I propose teh follwointext:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 send DOTS mitigation request to the orchestrator.=C2=A0 The DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with additional informati=
on to let the orchestrator know what has triggered the request.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay (Mitigation hints (=E2=80=9Cadditional inf=
ormation=E2=80=9D) are optional and is not mandatory to be conveyed in the =
mitigation request).<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The following text has been added:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an event o=
r some measurement<br>
indicators reach a predefined level to send DOTS mitigation request to<br>
the orchestrator.=C2=A0 The DOTS mitigation request may be associated with<=
br>
some optional mitigation hints to let the orchestrator know what has <br>
triggered the request.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">15) Figure 4 (DDoS Orch=
estration) includes both internal and external DDoS mitigation systems, but=
 the usage of internal and external DDoS mitigation systems in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple adminis=
trative domain use case. Why would multiple ISPs use the same orchestrator =
?<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The use case considers teh following administrative =
domains: ITP and Enterprise Network. I propose to simply replace internal b=
y Enterprise Network and external by ITP.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">16) Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<br>
<br>
Comment&gt; You may want to clarify the scrubbed traffic is re-directed to =
the Enterprise network via the tunneling mechanism.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection to the enterprise network may be performed via tunne=
ling mechanisms such as GRE for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] DNS redirection and BGP routing are two differe=
nt diversion techniques, DNS redirection is not required after BGP announce=
ment.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR]<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
Mitigation Service Provider typically involves BGP prefix<br>
announcement or DNS redirection, while re-injection of the scrubbed traffic=
 to the enterprise network may be performed via tunneling mechanisms such a=
s GRE for<br>
example.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><u></u>=C2=A0<u></u></p=
>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor wi=
ndowtext;border-style:none none none solid;border-width:medium medium mediu=
m 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">17) Of course, such mec=
hanisms needs to be regularly tested and<br>
=C2=A0 =C2=A0evaluated.<br>
<br>
Comment&gt; The above line does not look relevant to this document.<u></u><=
u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I am fine removing it.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border-color:currentcolor currentcolor currentcolor blue;bord=
er-style:none none none solid;border-width:medium medium medium 1.5pt;paddi=
ng:0in 0in 0in 4pt">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt">18)=C2=A0 =C2=A0Once th=
e requesting Enterprise Network is confident that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; It&#39;s not clear how the requesting Enterprise network will l=
earn the DDoS attack has ceased ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">DOTS status may be used for example. I hope teh text=
 provided for (2) clarifies this.=C2=A0
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] You may want to rephrase the above line similar=
 to the new text you have provided for (2).<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;
<u></u><u></u></p>
</div>
<blockquote style=3D"border-color:currentcolor currentcolor currentcolor rg=
b(204,204,204);border-style:none none none solid;border-width:medium medium=
 medium 1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">______________________________<wbr>_________________=
<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/dots</a><u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><br>
______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/dots</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div></div></div>
</div>
</div>
</div>

<br>______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dots</a><br>
<br></blockquote></div><br></div></div></div>

--000000000000b0d271056f8c7a9a--


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Daniel Migault <daniel.migault@ericsson.com>
CC: Tobias Gondrom <tobias.gondrom@gondrom.org>, Roman Danyliw <rdd@cert.org>,  "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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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 DDoS Open Threat Signaling WG of the IETF.

        Title           : Use cases for DDoS Open Threat Signaling
        Authors         : Roland Dobbins
                          Daniel Migault
                          Stefan Fouant
                          Robert Moskowitz
                          Nik Teague
                          Liang Xia
                          Kaname Nishizuka
	Filename        : draft-ietf-dots-use-cases-13.txt
	Pages           : 14
	Date            : 2018-06-27

Abstract:
   The DDoS Open Threat Signaling (DOTS) effort is intended to provide
   protocols to facilitate interoperability across disparate DDoS
   mitigation solutions.  This document presents use cases which
   describe the interactions expected between the DOTS components as
   well as DOTS messaging exchanges.  These use cases are meant to
   identify the interacting DOTS components, how they collaborate and
   what are the typical information to be exchanged.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-use-cases/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-use-cases-13
https://datatracker.ietf.org/doc/html/draft-ietf-dots-use-cases-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-use-cases-13


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Wed, 27 Jun 2018 10:53:55 -0400
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Subject: Re: [Dots] WGLC for use cases draft - until July-1.
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Thanks Tiru for the feed back. I support the idea of your draft. I will
publish the agreed version [1]. The diiff can be seen there [2] if there is
anything I missed, please let me know.

Additional comments are welcome!
Yours
Daniel

[1] https://datatracker.ietf.org/doc/draft-ietf-dots-use-cases/
[2] https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-use-cases-13

On Wed, Jun 27, 2018 at 2:27 AM, Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Daniel,
>
>
>
> Thanks for addressing all the comments, Please see inline [TR3]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Tuesday, June 26, 2018 8:10 PM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> Please see my response inline. I believe we are close to reaching a
> consensus.
>
>
>
> Yours,
>
> Daniel
>
>
>
> On Tue, Jun 26, 2018 at 7:02 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
>
>
> Please see inline [TR2]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Tuesday, June 26, 2018 8:33 AM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi,
>
>
>
> Thanks for the feed backs. IN my opinion the only issues that remain open
> are issues 1 and 15 . These are copied below. I provided also inline the
> status of each issues - for further details. Once we are clear with these
> two issues, I will publish a new version.
>
>
>
> Thanks you very much for teh comments.
>
>
>
> Yours,
>
> Daniel
>
>
>
>
>
>
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
> <mglt>
>
> I understand your comment for the hints. These were example of informatio=
n
> provided. I agree to mention as GEN-004 that information is a hints that
> may be interpreted.
>
> What is not clear to me is that I do not see how volumetric attacks can b=
e
> addressed in this case. A volumetric attack whose target is in the
> Enterprise Network woudl be detected by the DMS of that Enterprise networ=
k.
> In that case the DMS of the Enterprise network will have a DOTS client
> sending a request to the DOTS Server of the ITP..  This is not the case w=
e
> consider here as it has already been described as the primary
> alternative.The reason for a ITP DMS to send a request to the DMS of the
> Enterprise could be 1) the Enterprise network is taking part of a DDoS
> atatck, 2) the ITP DMS delegate the DDoS mitigation to the DMS Enterprise
> network. I see 1) as informing that hosts of the network are being infect=
ed
> and being part of a botnet. I am confused by 2) as I see ITP DMS with way=
s
> more resource than the Enterprise network. Could you elaborate a bit on t=
he
> scenario ?
>
>
>
> [TR2] I meant don=E2=80=99t club incoming and outgoing attacks in the sam=
e use
> case, my suggestion is to focus only on the incoming volumetric attack in
> this use case.
>
> If you plan to discuss outgoing attack from the Enterprise network, pleas=
e
> add more details why the Enterprise DMS cannot detect the outgoing attack=
s
> and how will the additional information provided by the ITP DMS help the
> Enterprise DMS to detect outgoing DDoS attacks, and how this additional
> information is useful when the compromised hosts in the Enterprise networ=
ks
> are behind NAT ?
>
>
>
> </mglt>
>
> <mglt3>
>
> OK got it. Actually I added this use case after our discussion in the
> IETF. I believe also its is going a bit beyong the volumetric attacks. I =
am
> ok removing it. It has been removed on my local version.
>
>
>
> [TR3] Thanks.  I am facing problems with detecting all types of outgoing
> DDoS attacks on home routers (only few packets are punted to the slow pat=
h
> for inspection) and I think DOTS can help to punt traffic from compromise=
d
> devices to slow path for outgoing DDoS traffic detection. Further,
> additional information like source IP and source ports conveyed in the DO=
TS
> signal channel to identify the hosts behind NAT, and the call home featur=
e
> discussed in https://tools.ietf.org/html/rfc8071 is required for DOTS
> signal channel, though the CPE is acting as a DOTS server it will initiat=
e
> the connection (TLS or DTLS) to the DOTS client in the access network, an=
d
> then the roles get reversed.
>
>
>
> I will try to publish a draft before the DOTS WG meeting at IETF 102.
>
>
>
> </mglt3>
>
>
>
> 15) Figure 4 (DDoS Orchestration) includes both internal and external DDo=
S
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The use case considers the following administrative domains: ITP and
> Enterprise Network. I propose to simply replace "internal" by Enterprise
> Network and "external" by ITP.
>
>
>
> [TR2] Okay, but why would the upstream ITP and Enterprise network use the
> same orchestrator ?
>
> <mglt3>
>
> The orchestrator is in the Enterprise Network
>
> and decides between different DDoS Mitigation Serviec Provider. One of
> those is hosted in the NEterprise NEtwork, the other one is in the ITP..
> Sure they share the same orchestrator, but in my opinion that is the
> otherway around, the orchestrator got access to multiple providers. How d=
o
> you think we should clarify this ?
>
>
>
> [TR3] Updated figure looks good to me, Thanks for the clarification.
>
>
>
> Cheers,
>
> -Tiru
>
>
>
> The figure I am proposing is as below:
>
>
>
>            +----------+
>            | network  |C            (Enterprise Network)
>            | adminis  |<-+
>            | trator   |  |
>            +----------+  |
>                          |
>            +----------+  | S+--------------+     +-----------+
>            |telemetry/|  +->|              |C   S| DDoS      |+
>            |monitoring|<--->| Orchestrator |<--->| mitigation||
>            |systems   |C   S|              |<-+  | systems   ||
>            +----------+     +--------------+C |  +-----------+|
>                                               |    +----------+
>            -----------------------------------|-----------------
>                                               |
>                                               |
>               (Internet Transit Provider)     |
>                                               |  +-----------+
>                                               | S| DDoS      |
>                                               +->| mitigation|
>                                                  | systems   |
>                                                  +-----------+
>            * C is for DOTS client functionality
>            * S is for DOTS server functionality
>
>    Figure 4: DDoS Orchestration
>
>
>
> </mglt3>
>
>
>
> -Tiru
>
>
>
> </mglt>
>
>
>
>
>
>
>
> On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
>
>
> Please see inline [TR]
>
>
>
> *From:* mglt.ietf@gmail.com [mailto:mglt.ietf@gmail.com] *On Behalf Of *D=
aniel
> Migault
> *Sent:* Thursday, June 21, 2018 1:28 AM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Tobias Gondrom <tobias.gondrom@gondrom.org>; Roman Danyliw <
> rdd@cert.org>; dots@ietf.org
> *Subject:* Re: [Dots] WGLC for use cases draft - until July-1.
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> Thanks for the comments. Please see inline my responses. If the proposed
> text is fine to youI will update the draft and publish a new version by t=
he
> end of the week.
>
>
>
> Yours,
>
> Daniel
>
>
>
> On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Daniel,
>
> My comments and nits
>
> 1)
>
>    The current scenario describes the case where the DDoS Target is in
>    the enterprise network while the secondary DMS is provided by the
>    upstream ITP.  An alternate use case may consider the scenario where
>    the ITP informs the enterprise network it is involved into an ongoing
>    attack or that infected machines have been identified.  In this case
>    the DOTS client and DOTS server roles are inverted.  The DOTS client
>    is located in the ITP network and the DOTS server is hosted in the
>    enterprise network.  The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
>
>
> Comment>  If the DMS in the enterprise network is not capable of detectin=
g
> outgoing DDoS attack, how will the signaling from the DOTS client in the
> upstream ITP to the DOTS server in the enterprise network help it to dete=
ct
> and mitigate the outgoing DDoS attack ?
>
> <mglt>
>
>
>
> While writing the use case the example I had in mind was that the ITP
> could signal the network enterprise that some hosts are being infected an=
d
> belonging to a botnet. The ITP could provide a list of suspicious tagged
> IPv6 or the indication that hosts are suspected to belong to a specific
> botnet.
>
> The network enterprise may then take the necessary action, monitoring
> specific DNS requests, running specific scans over its hosts... At least
> this what I had in mind. The specific signaling should be defined by DOTS=
.
> Do you think the text should be updated as below ?
>
>
>
>
>
> OLD:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  In some case the DDoS Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> NEW:
>
> [...] The enterprise network is then responsible to
>    perform the DDoS Mitigation.  Typically, the ITP could provide a list
> of suspicious hosts with some additional information related the detected
> attacks such as DDoS, Botnet, .... According to the type of attack, the
> enterprise is likely to apply specific security policies which could
> include security checks, updates on the tagged hosts as well as
> instantiating specific monitoring traffic elements such as certain type o=
f
> DNS queries, traffic of specific destination...  In some case the DDoS
> Mitigation may be
>    delegated back to the upstream ITP, as described in this section.
>
> [TR] The above text is not completely clear. The above text assumes hosts
> in the enterprise network are not behind NAT. Further, DMS in the
> enterprise network should be monitoring both incoming and outgoing traffi=
c
> and capable of detecting outgoing DDoS attacks. I think the use case shou=
ld
> only focus on volumetric attack exceeding the capacity of the DMS in the
> Enterprise network and not discuss multiple attack vectors (You may also
> want to look into the requirement GEN-004 (Mitigation hinting) in the
> requirements draft).
>
> </mglt>
>
>
>
> <mglt>
>
> I understand your comment. These were example of information provided. I
> agree to mention as GEN-004 that information is a hints that may be
> interpreted. I do not see how volumetric attacks can be addressed in this
> case. A volumetric attack whose target is in the Entreprise Network woudl
> be detected by the DMS of that Enterprise network. In that case the DMS o=
f
> the Enterprise network will have a DOTS client sending a request to the
> DOTS Server of the ITP..  This is not the case we consider here as it has
> already been described as the primary alternative.The reason for a ITP DM=
S
> to send a request to the DMS of the Enterprise could be 1) the Enterprise
> network is taking part of a DDoS atatck, 2) the ITP DMS delegate the DDoS
> mitigation to the DMS Enterprise network. I see 1) as informing that host=
s
> of the network are being infected and being part of a botnet. I am confus=
ed
> by 2) as I see ITP DMS with ways more resource than the Enterprise networ=
k.
> Could you elaborate a bit on the scenario you have in mind ?
>
>
>
> </mglt>
>
>
> 2)
>    Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> In the above line, I don't get "that it has received a DOTS DDoS
> Mitigation termination request from a downstream Enterprise Network or DD=
oS
> Mitigation Service Provider".
> I think you mean "or notified by the DDoS Mitigation Service Provider tha=
t
> the DDoS attack has stopped"
>
>
>
> <mglt>
>
> The text attempt to provide reasons for a DOTS Client to send a DOTS DDoS
> Mitigation termination request. It could be that a) information received
> from the upstream DMS indicates the attacks has been stopped or that the
> attack is sufficiently low so that it can handle the attack on its own. O=
n
> the other hand, in the case of collaboration between DMS, a DMS may end t=
he
> collaboration with an upstream DMS because the downstream DMS has request=
ed
> so. I propose the follwoing clarification, please let me know if that is
> fine with you:
>
>
>
>
>
> OLD:
>
> Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
>
>
> NEW:
>
> Once the requesting Enterprise Network has been notified by the DDoS
> Mitigation Service
>    Provider. the attack has been stopped, or that the level of the attack
> has fallen to levels of traffic/
>    complexity which they can handle on their own, the Enterprise Network
> may notify the DDoS Mitigation Service Provider to stop the DDoS
> Mitigation.
>
>
>
>
>
> [TR] You may want to simplify the above text as follows :
>
> The DOTS server notifies the mitigation metrics to the DOTS client. If th=
e
> DDoS attack has stopped or the severity of the attack has subsided, the
> DOTS client can request the DDoS Mitigation Service Provider to stop the
> DDoS Mitigation.
>
>
>
>
>
> Similarly, when DDoS Mitigation Service Providers are collaborating, a
> DDoS Mitigation Service Provider may relay the request for terminating a
> DDoS MItigation to the upstream DoS Mitigation Service Provider upon
> request from a downstream  DoS Mitigation Service Provider. In any case t=
he
> termination of a DDoS Mitigation is requested by the Network Enterprise
> DOTS client sending a DOTS DDoS Mitigation termination request to the DDo=
S
> Mitigation Service Provider.
>
>
>
> [TR] I am not sure about the above lines, DDoS mitigation service
> providers collaborating with each other does not look relevant to this us=
e
> case. You may want to remove the above lines.
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The reason for mentioning the collaboration was to indicate there are
> multiple reasons to stop the mitigation. You can be the one deciding give=
n
> the status provided or your can can do that because you have been asked t=
o
> do it. I am fine removing the latest case. Done.
>
>
>
> </mglt>
>
> 3)
>
>    The pre-arrangement typically includes the agreement on the
>    mechanisms used to redirect the traffic to the DDoS Mitigation
>    Service Provider, as well as the mechanism to to re-inject the
>
>  >>>>>>>>>>>>>>>>>>>>>>>>>>> Remove "to"
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
> 4)
>
>    o  DDoS Mitigation Service: designates a DDoS service provided to a
>       customer and which is scoped to mitigate DDoS attacks.  Services
>       usually involve Service Level Agreement (SLA) that have to be met.
>       It is the responsibility of the service provider to instantiate
>       the DDoS Mitigation System to meet these SLAs.
>
>    o  DDoS Mitigation System (DMS): A system that performs DDoS
>       mitigation.  The DDoS Mitigation System may be composed by a
>       cluster of hardware and/or software resources, but could also
>       involve an orchestrator that may take decisions such as
>       outsourcing partial or more of the mitigation to another DDoS
>       Mitigation System.
>
> Nit> For better readability you may want to define "DMS" followed by "DDo=
S
> Mitigation Service"
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
>
> 5)
>    DOTS is at risk from three primary attacks: DOTS agent impersonation,
>    traffic injection, and signaling blocking.  The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> Comment> A MITM attacker can drop all the DOTS signal channel traffic,
> designing the DOTS signal channel protocol for minimal data
> transfer will not address the MITM attack.
>
>
>
> <mglt>
>
>  Agree. I propose to remove:
>
> """
>
> The DOTS protocol must be
>    designed for minimal data transfer to address the blocking risk.
>
> """
>
> </mglt>
>
>
>
> [TR] Thanks.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
>
> 6)
>    One consideration could be to minimize the security technologies in us=
e
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> Comment> The DOTS signal and data channels are using TLS for mutual
> authentication, confidentiality and data integrity. I don't see the need
> for the above lines.
>
> <mglt>
>
> Agree.  I propose to remove the following lines:
>
> """
>
>  One consideration could be to minimize the security technologies in use
> at any one
>    time.  The more needed, the greater the risk of failures coming from
>    assumptions on one technology providing protection that it does not
>    in the presence of another technology.
>
> """
>
>
>
> </mglt>
>
>
>
> [TR] Okay.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
> 7)
>    When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
> Comment> I think you mean the DDoS attack has stopped. You may want to
> rephrase the line.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> When the DDoS mitigation is finished on the DMS, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the DDoS mitigation is finished.
>
>
>
> NEW:
>
> When the DDoS attack has stopped, the orchestrator
>    indicates to the telemetry systems as well as to the network
>    administrator the end of the DDoS Mitigation.
>
> </mglt>
>
>
>
> [TR] Looks good.
>
> <mglt>
>
> done
>
> </mglt>
>
>
>
> 8)
>    Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
> Comment> You may want to clarify the DOTS client will later be notified
> that the DDoS mitigation is effective.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    mitigation is starting while not effective.
>
>
>
> NEW:
>
> Upon receiving the DOTS request for DDoS mitigation from the network
>    administrator, the orchestrator coordinates the DDoS Mitigation
>    according to a specified strategy.  Its status indicates the DDoS
>    Mitigation is starting while not effective. The DOTS client of the
> orchestrator will later be notified that the DDoS Mitigation is effective=
.
>
>
>
> [TR] Looks good.
>
>
>
> <mglt>
>
> done
>
> </mglt>
>
>
>
>
>
> </mglt>
>
>
> 9) If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
> Nit> The above line is not clear, who are "they" in the above line ?
>
> <mglt>
>
> I propose the followin text:
>
>
>
> OLD:
>
> If the network administrator decides to start the
>    mitigation, they order through her web interface a DOTS client to
>    send a request for DDoS mitigation.
>
>
>
> NEW:
>
> If the network administrator decides to start the
>    mitigation, the network administrator orders through her web interface
> a DOTS client to
>    send a request for DDoS mitigation.
>
> </mglt>
>
>
>
> [TR] You may want to remove gender from the above line and simplify the
> text.
>
> NEW:
>
> If the network administrator decides to start the
> mitigation, the network administrator triggers the DDoS mitigation reques=
t
> using the web interface of a DOTS client.
>
>
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
> 10) This request is expected to be associated with a context that
> identifies the DDoS mitigation selected.
>
> Comment> I don't understand the context of the above line.
>
>
>
> <mg;t>
>
> The context constitutes of elements, indications that provides sufficient
> information to the orchestrator to know what needs to be done. in other
> words, the DDoS Mitigation.
>
> I propose the following text:
>
>
>
> OLD:
>
> This request is expected to be associated with a context that identifies
> the DDoS mitigation selected.
>
>
>
> NEW:
>
> This request is expected to be associated with a context that identifies
> or provide sufficient information to the orchestrator to in fer the DDoS
> Mitigation to elaborate and coordinate.
>
>
>
> [TR] NEW:
>
> This request is expected to be associated with a context that provides
> sufficient information to the orchestrator to infer the DDoS Mitigation t=
o
> elaborate and coordinate.
>
>
>
>
>
> </mglt>
>
>
>
> <mglt
>
> done
>
> </mglt>
>
>
> 11)   Upon receiving the DOTS request for DDoS mitigation from the networ=
k
>    administrator, the orchestrator coordinates the DDoS mitigation
>    according to a specified strategy.
>
> Comment> What is the specified strategy (you may want to give an example)=
 ?
>
> <mglt>
>
> I propose to add the follwoing text, but I am happy if you are willing to
> provide a more specific example.
>
>
>
> NEW:
>
> Upon receiving a request to mitigate a DDoS attack performed over a
> target, the orchestrator, may evaluate the volumetry of the attack as wel=
l
> as the value that represent the target. Then it may also request an
> upstream DMS Provider to filter the traffic while moving the target to
> another network so new sessions will not be impacted.
>
>
>
> [TR] I don=E2=80=99t think moving the target to a different network is ea=
sy.
> However, the orchestrator may select the DDoS mitigation provider based o=
n
> the attack severity.
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> I agree MTD is not easy, but I wanted to stress that the orchestrator can
> be coordinate complex operations ,that is a bit more than delegating. I
> have added the following text:
>
>
>
> NEW:
>
> Upon receiving a request to mitigate a DDoS attack performed over a
> target, the orchestrator, may evaluate the volumetry of the attack as wel=
l
> as the value that represent the target. The orchestrator may select the
> DDoS Mitigation Service  Provider based on the attack severity. It may al=
so
> coordinate the DDoS Mitigation performed by the DDoS Mitigation Service
> Provider with some other tasks such as for example,  moving the target to
> another network so new sessions will not be impacted.
>
>
>
>
>
> </mglt>
>
>
> 12)
> The status of the DDoS mitigation indicates the orchestrator is in an
> analyzing phase.
>
>
>
> Comment> DOTS signal channel draft does not indicate the mitigation statu=
s
> is in analyzing phase (Please see "Table 2: Values of 'status' Parameter"
> in the draft).
>
> <mglt>
>
> I propose to remove:
>
>
>
> """
>
> The status of the DDoS
> mitigation indicates the orchestrator is in an analyzing phase.
>
> """
>
> </mglt>
>
>
>
> [TR] Okay
>
>
>
>  <mglt>
>
> Done
>
> </mglt>
>
> 13)
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
> Comment> The orchestrator would anyway be collecting data from various
> telemetry systems for correlation.
>
> <mglt>
>
> Agree. I think what I wanted to say that we may move to a state where
> finer information is being monitored. I porposed the follwoing text:
>
>
>
> OLD:
>
> The orchestrator begins collecting various information from various
> telemetry systems in order to correlate the measurements and provide  an
> analysis of the event.
>
>
>
> NEW:
>
> The orchestrator may begin collecting additional fined grain and specific
> information from various  telemetry systems in order to correlate the
> measurements and provide an analysis of the event.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
>
>
>  <mglt>
>
> Done
>
> </mglt>
>
> 14) These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
> Comment> what do you mean by "some measurement indicators" and "specific
> reporting" (looks vague to me) ?
>
> <mglt>
>
>
>
> measurement indicators means to me, some variables that we believe
> representative for threat detection, this typically involved the traffic
> load, the number of SYNs...Specific reporting here indicates what the DOT=
S
> client refers to while triggering teh DDoS Mitigation request. I propose
> teh follwointext:
>
>
>
> OLD:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>    report a DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with some element such as
>    specific reporting.
>
>
>
> NEW:
>
> These systems are configured so that when an
>    event or some measurement indicators reach a predefined level to
>   send DOTS mitigation request to the orchestrator.  The DOTS
>    mitigation request may be associated with additional information to le=
t
> the orchestrator know what has triggered the request.
>
>
>
> [TR] Okay (Mitigation hints (=E2=80=9Cadditional information=E2=80=9D) ar=
e optional and is
> not mandatory to be conveyed in the mitigation request).
>
>
>
> </mglt>
>
>
>
>
>
> <mglt>
>
>
>
> Done
>
>
>
> The following text has been added:
>
> These systems are configured so that when an event or some measurement
> indicators reach a predefined level to send DOTS mitigation request to
> the orchestrator.  The DOTS mitigation request may be associated with
> some optional mitigation hints to let the orchestrator know what has
> triggered the request.
>
> </mglt>
>
>
>
> 15) Figure 4 (DDoS Orchestration) includes both internal and external DDo=
S
> mitigation systems, but the usage of internal and external DDoS mitigatio=
n
> systems in
>        not discussed in section 3.3.
>
> <mglt>
>
> I propose the following change in teh beginign of teh section:
>
>
>
> OLD:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices monitor a network - typically an ISP network.
>
>
>
> NEW:
>
> In this use case, one or more DDoS telemetry systems or monitoring
> devices spread over one or multiple administrative domains provides healt=
h
> indicator of the network traffic to the orchestrator
>
>
>
> I also propose to indicate on the figure ( orchetsrator adinistrative
> domain / other administraiev domains
>
>
>
> [TR] I don=E2=80=99t understand the multiple administrative domain use ca=
se. Why
> would multiple ISPs use the same orchestrator ?
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> The use case considers teh following administrative domains: ITP and
> Enterprise Network. I propose to simply replace internal by Enterprise
> Network and external by ITP.
>
>
>
> </mglt>
>
> 16) Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
> Comment> You may want to clarify the scrubbed traffic is re-directed to
> the Enterprise network via the tunneling mechanism.
>
>
>
> <mglt>
>
> I propose the following text:
>
>
>
> OLD:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection may be performed via tunneling mechanisms such as GRE for
>    example.
>
>
>
> NEW:
>
> Redirection to the DDoS
>    Mitigation Service Provider typically involves BGP prefix
>    announcement eventually combined with DNS redirection, while re-
>    injection to the enterprise network may be performed via tunneling
> mechanisms such as GRE for
>    example.
>
>
>
> [TR] DNS redirection and BGP routing are two different diversion
> techniques, DNS redirection is not required after BGP announcement.
>
>
>
> [TR]
>
> NEW:
>
> Redirection to the DDoS
> Mitigation Service Provider typically involves BGP prefix
> announcement or DNS redirection, while re-injection of the scrubbed
> traffic to the enterprise network may be performed via tunneling mechanis=
ms
> such as GRE for
> example.
>
>
>
>
>
> </mglt>
>
>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
> 17) Of course, such mechanisms needs to be regularly tested and
>    evaluated.
>
> Comment> The above line does not look relevant to this document.
>
> <mglt>
>
>
>
> I am fine removing it.
>
>
>
> [TR] Okay.
>
>
>
> </mglt>
>
> <mglt>
>
> Done
>
> </mglt>
>
>
>
>
>
> 18)   Once the requesting Enterprise Network is confident that the DDoS
>    attack has either ceased or has fallen to levels of traffic/
>    complexity which they can handle on their own or that it has received
>    a DOTS DDoS Mitigation termination request from a downstream
>    Enterprise Network or DDoS Mitigation Service Provider, the
>    requesting Enterprise Network DOTS client sends a DOTS DDoS
>    Mitigation termination request to the DDoS Mitigation Service
>    Provider.
>
> Comment> It's not clear how the requesting Enterprise network will learn
> the DDoS attack has ceased ?
>
> <mglt>
>
> DOTS status may be used for example. I hope teh text provided for (2)
> clarifies this.
>
>
>
> [TR] You may want to rephrase the above line similar to the new text you
> have provided for (2).
>
>
>
> Cheers,
>
> -Tiru
>
>
>
> </mglt>
>
> -Tiru
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
>

--000000000000b38175056fa0c827
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Thanks Tiru for the feed back. I support the idea of =
your draft. I will publish the agreed version [1]. The diiff can be seen th=
ere [2] if there is anything I missed, please let me know. <br></div><div><=
br></div><div>Additional comments are welcome!</div><div>Yours</div><div>Da=
niel<br></div><div><br></div><div>[1] <span style=3D"font-size:11pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif"><a href=3D"https://datatracker.ietf.or=
g/doc/draft-ietf-dots-use-cases/" style=3D"color:rgb(5,99,193);text-decorat=
ion:underline">https://datatracker.ietf.org/doc/draft-ietf-dots-use-cases/<=
/a><br></span></div><div><span style=3D"font-size:11pt;font-family:&quot;Ca=
libri&quot;,sans-serif">[2] <span style=3D""><a href=3D"https://www.ietf.or=
g/rfcdiff?url2=3Ddraft-ietf-dots-use-cases-13" style=3D"color:rgb(5,99,193)=
;text-decoration:underline">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-=
dots-use-cases-13</a></span>



</span><br> </div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_=
quote">On Wed, Jun 27, 2018 at 2:27 AM, Konda, Tirumaleswar Reddy <span dir=
=3D"ltr">&lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=
=3D"_blank">TirumaleswarReddy_Konda@mcafee.com</a>&gt;</span> wrote:<br><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #=
ccc solid;padding-left:1ex">





<div link=3D"blue" vlink=3D"purple" lang=3D"EN-US">
<div class=3D"m_-3710438652161465357WordSection1">
<p class=3D"MsoNormal">Hi Daniel,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks for addressing all the comments, Please see i=
nline [TR3]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-3710438652161465357__MailEndCompose"><=
u></u>=C2=A0<u></u></a></p>
<span></span>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b>From:</b> <a href=3D"mailto:mglt.ietf@gmail.com" =
target=3D"_blank">mglt.ietf@gmail.com</a> [mailto:<a href=3D"mailto:mglt.ie=
tf@gmail.com" target=3D"_blank">mglt.ietf@gmail.com</a>]
<b>On Behalf Of </b>Daniel Migault<br>
<b>Sent:</b> Tuesday, June 26, 2018 8:10 PM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@<wbr>McAfe=
e.com&gt;<br>
<b>Cc:</b> Tobias Gondrom &lt;<a href=3D"mailto:tobias.gondrom@gondrom.org"=
 target=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a=
 href=3D"mailto:rdd@cert.org" target=3D"_blank">rdd@cert.org</a>&gt;; <a hr=
ef=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
<b>Subject:</b> Re: [Dots] WGLC for use cases draft - until July-1.<u></u><=
u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"m_-3710438652161465357MsoNormalTable" style=3D"background:#=
f3ff33;border:solid #9b9a87 1.5pt" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:none;padding:.75pt .75pt .75pt .75pt">
<p><strong><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:#9=
b8b3e">CAUTION</span></strong><span style=3D"font-family:&quot;Arial&quot;,=
sans-serif;color:#9b8b3e">:</span><span style=3D"font-family:&quot;Arial&qu=
ot;,sans-serif;color:black"> External email. Do not click links or open
 attachments unless you recognize the sender and know the content is safe.<=
/span><span style=3D"font-family:&quot;Arial&quot;,sans-serif"><u></u><u></=
u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru, <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Please see my response inline. I believe we are clos=
e to reaching a consensus.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours, <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Tue, Jun 26, 2018 at 7:02 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal">Hi Daniel,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Please see inline [TR2]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-3710438652161465357_m_-811494316979268=
8912__MailEndCompose">=C2=A0</a><u></u><u></u></p>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div style=3D"border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0=
in 0in 0in;border-color:currentcolor currentcolor">
<p class=3D"MsoNormal"><span class=3D"m_-3710438652161465357gmail-"><b>From=
:</b>
<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt.ietf@gmail.co=
m</a> [mailto:<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt=
.ietf@gmail.com</a>]
<b>On Behalf Of </b>Daniel Migault</span><br>
<b>Sent:</b> Tuesday, June 26, 2018 8:33 AM<br>
<span class=3D"m_-3710438652161465357gmail-"><b>To:</b> Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>McAfee.com</a>&gt;</span><br>
<span class=3D"m_-3710438652161465357gmail-"><b>Cc:</b> Tobias Gondrom &lt;=
<a href=3D"mailto:tobias.gondrom@gondrom.org" target=3D"_blank">tobias.gond=
rom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a href=3D"mailto:rdd@cert.org" =
target=3D"_blank">rdd@cert.org</a>&gt;;
<a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a></span>=
<br>
<span class=3D"m_-3710438652161465357gmail-"><b>Subject:</b> Re: [Dots] WGL=
C for use cases draft - until July-1.</span><u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<table class=3D"m_-3710438652161465357MsoNormalTable" style=3D"background:#=
f3ff33;border:solid #9b9a87 1.5pt" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:none;padding:.75pt .75pt .75pt .75pt">
<p><b><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:#9b8b3e=
">CAUTION</span></b><span style=3D"font-family:&quot;Arial&quot;,sans-serif=
;color:#9b8b3e">:</span><span style=3D"font-family:&quot;Arial&quot;,sans-s=
erif;color:black"> External email. Do not click links or open attachments
 unless you recognize the sender and know the content is safe.</span><u></u=
><u></u></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">Hi,
<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the feed backs. IN my opinion the only is=
sues that remain open are issues 1 and 15 . These are copied below. I provi=
ded also inline the status of each issues - for further
 details. Once we are clear with these two issues, I will publish a new ver=
sion. <u></u>
<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks you very much for teh comments.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours,
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Comment&gt;=C2=A0 If =
the DMS in the enterprise network is not capable of detecting outgoing DDoS=
 attack, how will the signaling from the DOTS client in the upstream ITP to=
 the DOTS server in
 the enterprise network help it to detect and mitigate the outgoing DDoS at=
tack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in mind=
 was that the ITP could signal the network enterprise that some hosts are b=
eing infected and belonging to a botnet. The ITP could
 provide a list of suspicious tagged IPv6 or the indication that hosts are =
suspected to belong to a specific botnet. =C2=A0
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary a=
ction, monitoring specific DNS requests, running specific scans over its ho=
sts... At least this what I had in mind. The specific
 signaling should be defined by DOTS. Do you think the text should be updat=
ed as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[...] The enterprise =
network is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[...] The enterprise =
network is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the tagg=
ed hosts as well as instantiating specific monitoring traffic elements such=
 as certain type of DNS queries, traffic of specific destination...=C2=A0 I=
n some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[TR] The above text i=
s not completely clear. The above text assumes hosts in the enterprise netw=
ork are not behind NAT. Further, DMS in the enterprise network should be mo=
nitoring both
 incoming and outgoing traffic and capable of detecting outgoing DDoS attac=
ks. I think the use case should only focus on volumetric attack exceeding t=
he capacity of the DMS in the Enterprise network and not discuss multiple a=
ttack vectors (You may also want
 to look into the requirement GEN-004 (Mitigation hinting) in the requireme=
nts draft).
<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I understand your comment for the hints. These were =
example of information provided. I agree to mention as GEN-004 that informa=
tion is a hints that may be interpreted.
<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">What is not clear to me is that I do not see how vol=
umetric attacks can be addressed in this case. A volumetric attack whose ta=
rget is in the Enterprise Network woudl be detected
 by the DMS of that Enterprise network. In that case the DMS of the Enterpr=
ise network will have a DOTS client sending a request to the DOTS Server of=
 the ITP..=C2=A0 This is not the case we consider here as it has already be=
en described as the primary alternative.The
 reason for a ITP DMS to send a request to the DMS of the Enterprise could =
be 1) the Enterprise network is taking part of a DDoS atatck, 2) the ITP DM=
S delegate the DDoS mitigation to the DMS Enterprise network. I see 1) as i=
nforming that hosts of the network
 are being infected and being part of a botnet. I am confused by 2) as I se=
e ITP DMS with ways more resource than the Enterprise network. Could you el=
aborate a bit on the scenario ?<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">[TR2] I meant don=E2=80=99t club incoming and outgoi=
ng attacks in the same use case, my suggestion is to focus only on the inco=
ming volumetric attack in this use case.
<u></u><u></u></p>
<p class=3D"MsoNormal">If you plan to discuss outgoing attack from the Ente=
rprise network, please add more details why the Enterprise DMS cannot detec=
t the outgoing attacks and how will the additional
 information provided by the ITP DMS help the Enterprise DMS to detect outg=
oing DDoS attacks, and how this additional information is useful when the c=
ompromised hosts in the Enterprise networks are behind NAT ?<u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt3&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OK got it. Actually I added this use case after our =
discussion in the IETF. I believe also its is going a bit beyong the volume=
tric attacks. I am ok removing it. It has been removed on my local version.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR3] Thanks.=C2=A0 I am facing problems with detect=
ing all types of outgoing DDoS attacks on home routers (only few packets ar=
e punted to the slow path for inspection) and I think DOTS can help to punt=
 traffic from compromised devices to slow
 path for outgoing DDoS traffic detection. Further, additional information =
like source IP and source ports conveyed in the DOTS signal channel to iden=
tify the hosts behind NAT, and the call home feature discussed in
<a href=3D"https://tools.ietf.org/html/rfc8071" target=3D"_blank">https://t=
ools.ietf.org/html/<wbr>rfc8071</a> is required for DOTS signal channel, th=
ough the CPE is acting as a DOTS server it will initiate the connection (TL=
S or DTLS) to the DOTS client in the access network, and
 then the roles get reversed. <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">I will try to publish a draft before the DOTS WG mee=
ting at IETF 102.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt3&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">15) Figure 4 (DDoS Or=
chestration) includes both internal and external DDoS mitigation systems, b=
ut the usage of internal and external DDoS mitigation systems in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple adminis=
trative domain use case. Why would multiple ISPs use the same orchestrator =
?<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The use case considers the following administrative =
domains: ITP and Enterprise Network. I propose to simply replace &quot;inte=
rnal&quot; by Enterprise Network and &quot;external&quot; by ITP.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR2] Okay, but why would the upstream ITP and Enter=
prise network use the same orchestrator ?<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt3&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator is in the Enterprise Network <u></u=
><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">and decides between different DDoS Mitigation Servie=
c Provider. One of those is hosted in the NEterprise NEtwork, the other one=
 is in the ITP.. Sure they share the same orchestrator, but in my opinion t=
hat is the otherway around, the orchestrator
 got access to multiple providers. How do you think we should clarify this =
?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR3] Updated figure looks good to me, Thanks for th=
e clarification.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The figure I am proposing is as below:<u></u><u></u>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Courier New&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 +----------+<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | network=C2=
=A0 |C=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (E=
nterprise Network)<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | adminis=C2=
=A0 |&lt;-+<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | trator=C2=A0=
=C2=A0 |=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----------+=
=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----------+=
=C2=A0 | S+--------------+=C2=A0=C2=A0=C2=A0=C2=A0 +-----------+<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |telemetry/|=
=C2=A0 +-&gt;|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 |C=C2=A0=C2=A0 S| DDoS=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |+<=
br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |monitoring|&l=
t;---&gt;| Orchestrator |&lt;---&gt;| mitigation||<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |systems=C2=A0=
=C2=A0 |C=C2=A0=C2=A0 S|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0 |&lt;-+=C2=A0 | systems=C2=A0=C2=A0 ||<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----------+=
=C2=A0=C2=A0=C2=A0=C2=A0 +--------------+C |=C2=A0 +-----------+|<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0 +--=
--------+<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 --------------=
----------------<wbr>-----|-----------------<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 (Internet Transit Provider)=C2=A0=C2=A0=C2=A0=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0 +-----------+<b=
r>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | S| DDoS=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +-&gt;| mitigation|<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | sys=
tems=C2=A0=C2=A0 |<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +----=
-------+<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 * C is for DOT=
S client functionality</span><br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 * S is for DOT=
S server functionality<br>
<br>
=C2=A0=C2=A0 Figure 4: DDoS Orchestration<br>
<br>
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt3&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">On Sun, Jun 24, 2018 at 4:05 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<p class=3D"MsoNormal">Hi Daniel,
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Please see inline [TR]<u></u><u></u></p>
<p class=3D"MsoNormal"><a name=3D"m_-3710438652161465357_m_-811494316979268=
8912_m_-23282208098474">=C2=A0</a><u></u><u></u></p>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div style=3D"border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0=
in 0in 0in;border-color:currentcolor">
<p class=3D"MsoNormal"><b>From:</b>
<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt.ietf@gmail.co=
m</a> [mailto:<a href=3D"mailto:mglt.ietf@gmail.com" target=3D"_blank">mglt=
.ietf@gmail.com</a>]
<b>On Behalf Of </b>Daniel Migault<br>
<b>Sent:</b> Thursday, June 21, 2018 1:28 AM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@McAfe<a hr=
ef=3D"http://e.com" target=3D"_blank"><wbr>e.com</a>&gt;<br>
<b>Cc:</b> Tobias Gondrom &lt;<a href=3D"mailto:tobias.gondrom@gondrom.org"=
 target=3D"_blank">tobias.gondrom@gondrom.org</a>&gt;; Roman Danyliw &lt;<a=
 href=3D"mailto:rdd@cert.org" target=3D"_blank">rdd@cert.org</a>&gt;;
<a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
<b>Subject:</b> Re: [Dots] WGLC for use cases draft - until July-1.<u></u><=
u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<table class=3D"m_-3710438652161465357MsoNormalTable" style=3D"background:#=
f3ff33;border:solid #9b9a87 1.5pt" cellpadding=3D"0" border=3D"1">
<tbody>
<tr>
<td style=3D"border:none;padding:.75pt .75pt .75pt .75pt">
<p><b><span style=3D"font-family:&quot;Arial&quot;,sans-serif;color:#9b8b3e=
">CAUTION</span></b><span style=3D"font-family:&quot;Arial&quot;,sans-serif=
;color:#9b8b3e">:</span><span style=3D"font-family:&quot;Arial&quot;,sans-s=
erif;color:black"> External email. Do not click links or open attachments
 unless you recognize the sender and know the content is safe.</span><u></u=
><u></u></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" style=3D"text-align:center" align=3D"center">
<hr align=3D"center" width=3D"100%" size=3D"2">
</div>
</div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru,
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the comments. Please see inline my respon=
ses. If the proposed text is fine to youI will update the draft and publish=
 a new version by the end of the week.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours,
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<div>
<div>
<p class=3D"MsoNormal">On Tue, Jun 19, 2018 at 9:05 AM, Konda, Tirumaleswar=
 Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"=
_blank">TirumaleswarReddy_Konda@<wbr>mcafee.com</a>&gt; wrote:<u></u><u></u=
></p>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Hi Daniel,<br>
<br>
My comments and nits<br>
<br>
1)<br>
<br>
=C2=A0 =C2=A0The current scenario describes the case where the DDoS Target =
is in<br>
=C2=A0 =C2=A0the enterprise network while the secondary DMS is provided by =
the<br>
=C2=A0 =C2=A0upstream ITP.=C2=A0 An alternate use case may consider the sce=
nario where<br>
=C2=A0 =C2=A0the ITP informs the enterprise network it is involved into an =
ongoing<br>
=C2=A0 =C2=A0attack or that infected machines have been identified.=C2=A0 I=
n this case<br>
=C2=A0 =C2=A0the DOTS client and DOTS server roles are inverted.=C2=A0 The =
DOTS client<br>
=C2=A0 =C2=A0is located in the ITP network and the DOTS server is hosted in=
 the<br>
=C2=A0 =C2=A0enterprise network.=C2=A0 The enterprise network is then respo=
nsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Comment&gt;=C2=A0 If =
the DMS in the enterprise network is not capable of detecting outgoing DDoS=
 attack, how will the signaling from the DOTS client in the upstream ITP to=
 the DOTS server in
 the enterprise network help it to detect and mitigate the outgoing DDoS at=
tack ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">While writing the use case the example I had in mind=
 was that the ITP could signal the network enterprise that some hosts are b=
eing infected and belonging to a botnet. The ITP could
 provide a list of suspicious tagged IPv6 or the indication that hosts are =
suspected to belong to a specific botnet. =C2=A0
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The network enterprise may then take the necessary a=
ction, monitoring specific DNS requests, running specific scans over its ho=
sts... At least this what I had in mind. The specific
 signaling should be defined by DOTS. Do you think the text should be updat=
ed as below ?<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[...] The enterprise =
network is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 In some case the DDoS Mitig=
ation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[...] The enterprise =
network is then responsible to<br>
=C2=A0 =C2=A0perform the DDoS Mitigation.=C2=A0 Typically, the ITP could pr=
ovide a list of suspicious hosts with some additional information related t=
he detected attacks such as DDoS, Botnet, .... According to the type of att=
ack, the enterprise is likely to apply specific
 security policies which could include security checks, updates on the tagg=
ed hosts as well as instantiating specific monitoring traffic elements such=
 as certain type of DNS queries, traffic of specific destination...=C2=A0 I=
n some case the DDoS Mitigation may be<br>
=C2=A0 =C2=A0delegated back to the upstream ITP, as described in this secti=
on.<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">[TR] The above text i=
s not completely clear. The above text assumes hosts in the enterprise netw=
ork are not behind NAT. Further, DMS in the enterprise network should be mo=
nitoring both
 incoming and outgoing traffic and capable of detecting outgoing DDoS attac=
ks. I think the use case should only focus on volumetric attack exceeding t=
he capacity of the DMS in the Enterprise network and not discuss multiple a=
ttack vectors (You may also want
 to look into the requirement GEN-004 (Mitigation hinting) in the requireme=
nts draft).
<u></u><u></u></p>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I understand your comment. These were example of inf=
ormation provided. I agree to mention as GEN-004 that information is a hint=
s that may be interpreted. I do not see how volumetric
 attacks can be addressed in this case. A volumetric attack whose target is=
 in the Entreprise Network woudl be detected by the DMS of that Enterprise =
network. In that case the DMS of the Enterprise network will have a DOTS cl=
ient sending a request to the DOTS
 Server of the ITP..=C2=A0 This is not the case we consider here as it has =
already been described as the primary alternative.The reason for a ITP DMS =
to send a request to the DMS of the Enterprise could be 1) the Enterprise n=
etwork is taking part of a DDoS atatck,
 2) the ITP DMS delegate the DDoS mitigation to the DMS Enterprise network.=
 I see 1) as informing that hosts of the network are being infected and bei=
ng part of a botnet. I am confused by 2) as I see ITP DMS with ways more re=
source than the Enterprise network.
 Could you elaborate a bit on the scenario you have in mind ?<u></u><u></u>=
</p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
2)<br>
=C2=A0 =C2=A0Once the requesting Enterprise Network is confident that the D=
DoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; In the above line, I don&#39;t get &quot;that it has received a=
 DOTS DDoS Mitigation termination request from a downstream Enterprise Netw=
ork or DDoS Mitigation Service Provider&quot;.<br>
I think you mean &quot;or notified by the DDoS Mitigation Service Provider =
that the DDoS attack has stopped&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The text attempt to provide reasons for a DOTS Clien=
t to send a DOTS DDoS Mitigation termination request. It could be that a) i=
nformation received from the upstream DMS indicates
 the attacks has been stopped or that the attack is sufficiently low so tha=
t it can handle the attack on its own. On the other hand, in the case of co=
llaboration between DMS, a DMS may end the collaboration with an upstream D=
MS because the downstream DMS has
 requested so. I propose the follwoing clarification, please let me know if=
 that is fine with you:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Once the requesting Enterprise Network is confident =
that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Once the requesting Enterprise Network has been noti=
fied by the DDoS Mitigation Service<br>
=C2=A0 =C2=A0Provider. the attack has been stopped, or that the level of th=
e attack has fallen to levels of traffic/<br>
=C2=A0 =C2=A0complexity which they can handle on their own, the Enterprise =
Network may notify the DDoS Mitigation Service Provider to stop the DDoS Mi=
tigation.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">[TR] You may want to simplify the above text as foll=
ows :<u></u><u></u></p>
<p class=3D"MsoNormal">The DOTS server notifies the mitigation metrics to t=
he DOTS client. If the DDoS attack has stopped or the severity of the attac=
k has subsided, the DOTS client can request the DDoS
 Mitigation Service Provider to stop the DDoS Mitigation.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Similarly, when DDoS Mitigation Service Providers ar=
e collaborating, a DDoS Mitigation Service Provider may relay the request f=
or terminating a DDoS MItigation to the upstream=C2=A0DoS
 Mitigation Service Provider upon request from a downstream=C2=A0 DoS Mitig=
ation Service Provider. In any case the termination of a DDoS Mitigation is=
 requested by the Network Enterprise DOTS client sending a DOTS DDoS Mitiga=
tion termination request to the DDoS
 Mitigation Service Provider.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I am not sure about the above lines, DDoS mitig=
ation service providers collaborating with each other does not look relevan=
t to this use case. You may want to remove the above
 lines. <u></u><u></u></p>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The reason for mentioning the collaboration was to i=
ndicate there are multiple reasons to stop the mitigation. You can be the o=
ne deciding given the status provided or your can
 can do that because you have been asked to do it. I am fine removing the l=
atest case. Done.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">3)<br>
<br>
=C2=A0 =C2=A0The pre-arrangement typically includes the agreement on the<br=
>
=C2=A0 =C2=A0mechanisms used to redirect the traffic to the DDoS Mitigation=
<br>
=C2=A0 =C2=A0Service Provider, as well as the mechanism to to re-inject the=
<br>
<br>
=C2=A0&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&=
gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; Remove &quot;to&quot;<u></u><u></u>=
</p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal">4)<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation Service: designates a DDoS service pro=
vided to a<br>
=C2=A0 =C2=A0 =C2=A0 customer and which is scoped to mitigate DDoS attacks.=
=C2=A0 Services<br>
=C2=A0 =C2=A0 =C2=A0 usually involve Service Level Agreement (SLA) that hav=
e to be met.<br>
=C2=A0 =C2=A0 =C2=A0 It is the responsibility of the service provider to in=
stantiate<br>
=C2=A0 =C2=A0 =C2=A0 the DDoS Mitigation System to meet these SLAs.<br>
<br>
=C2=A0 =C2=A0o=C2=A0 DDoS Mitigation System (DMS): A system that performs D=
DoS<br>
=C2=A0 =C2=A0 =C2=A0 mitigation.=C2=A0 The DDoS Mitigation System may be co=
mposed by a<br>
=C2=A0 =C2=A0 =C2=A0 cluster of hardware and/or software resources, but cou=
ld also<br>
=C2=A0 =C2=A0 =C2=A0 involve an orchestrator that may take decisions such a=
s<br>
=C2=A0 =C2=A0 =C2=A0 outsourcing partial or more of the mitigation to anoth=
er DDoS<br>
=C2=A0 =C2=A0 =C2=A0 Mitigation System.<br>
<br>
Nit&gt; For better readability you may want to define &quot;DMS&quot; follo=
wed by &quot;DDoS Mitigation Service&quot;<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal"><br>
5)<br>
=C2=A0 =C2=A0DOTS is at risk from three primary attacks: DOTS agent imperso=
nation,<br>
=C2=A0 =C2=A0traffic injection, and signaling blocking.=C2=A0 The DOTS prot=
ocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<br>
<br>
Comment&gt; A MITM attacker can drop all the DOTS signal channel traffic, d=
esigning the DOTS signal channel protocol for minimal data
<br>
transfer will not address the MITM attack.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0Agree. I propose to remove:
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The DOTS protocol must be<br>
=C2=A0 =C2=A0designed for minimal data transfer to address the blocking ris=
k.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Thanks.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
6)<br>
=C2=A0 =C2=A0One consideration could be to minimize the security technologi=
es in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<br>
<br>
Comment&gt; The DOTS signal and data channels are using TLS for mutual auth=
entication, confidentiality and data integrity. I don&#39;t see the need fo=
r the above lines.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree.=C2=A0 I propose to remove the following lines=
:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0One consideration could be to minimize the sec=
urity technologies in use at any one<br>
=C2=A0 =C2=A0time.=C2=A0 The more needed, the greater the risk of failures =
coming from<br>
=C2=A0 =C2=A0assumptions on one technology providing protection that it doe=
s not<br>
=C2=A0 =C2=A0in the presence of another technology.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal">7)<br>
=C2=A0 =C2=A0When the DDoS mitigation is finished on the DMS, the orchestra=
tor<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<br>
<br>
Comment&gt; I think you mean the DDoS attack has stopped. You may want to r=
ephrase the line.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS mitigation is finished on the DMS, the=
 orchestrator<br>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the DDoS mitigation is finished.<u></u><u></u></=
p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">When the DDoS attack has stopped, the orchestrator<b=
r>
=C2=A0 =C2=A0indicates to the telemetry systems as well as to the network<b=
r>
=C2=A0 =C2=A0administrator the end of the DDoS Mitigation.<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Looks good.
<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal">8)<br>
=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from the n=
etwork<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<br>
<br>
Comment&gt; You may want to clarify the DOTS client will later be notified =
that the DDoS mitigation is effective.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0 =C2=A0mitigation is starting while not effective.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving the DOTS request for DDoS mitigation =
from the network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS Mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.=C2=A0 Its status indicates =
the DDoS<br>
=C2=A0=C2=A0 Mitigation is starting while not effective. The DOTS client of=
 the orchestrator will later be notified that the DDoS Mitigation is effect=
ive.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Looks good.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
9) If the network administrator decides to start the<br>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <br>
<br>
Nit&gt; The above line is not clear, who are &quot;they&quot; in the above =
line ? <u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the followin text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, they order through her web interface a DOTS client=
 to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0=C2=A0<u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
=C2=A0 =C2=A0mitigation, the network administrator orders through her web i=
nterface a DOTS client to<br>
=C2=A0 =C2=A0send a request for DDoS mitigation.=C2=A0 <u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] You may want to remove gender from the above li=
ne and simplify the text.
<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">If the network administrator decides to start the<br=
>
mitigation, the network administrator triggers the DDoS mitigation request =
using the web interface of a DOTS client.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal">10) This request is expected to be associated with a=
 context that identifies the DDoS mitigation selected.<br>
<br>
Comment&gt; I don&#39;t understand the context of the above line.<u></u><u>=
</u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mg;t&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The context constitutes of elements, indications tha=
t provides sufficient information to the orchestrator to know what needs to=
 be done. in other words, the DDoS Mitigation.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies the DDoS mitigation selected.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that identifies or provide sufficient information to the orchestrator =
to in fer the DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">This request is expected to be associated with a con=
text that provides sufficient information to the orchestrator to infer the =
DDoS Mitigation to elaborate and coordinate.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal"><br>
11)=C2=A0 =C2=A0Upon receiving the DOTS request for DDoS mitigation from th=
e network<br>
=C2=A0 =C2=A0administrator, the orchestrator coordinates the DDoS mitigatio=
n<br>
=C2=A0 =C2=A0according to a specified strategy.<br>
<br>
Comment&gt; What is the specified strategy (you may want to give an example=
) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to add the follwoing text, but I am happy =
if you are willing to provide a more specific example.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving a request to mitigate a DDoS attack p=
erformed over a target, the orchestrator, may evaluate the volumetry of the=
 attack as well as the value that represent the target.
 Then it may also request an upstream DMS Provider to filter the traffic wh=
ile moving the target to another network so new sessions will not be impact=
ed.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t think moving the target to a di=
fferent network is easy. However, the orchestrator may select the DDoS miti=
gation provider based on the attack severity.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I agree MTD is not easy, but I wanted to stress that=
 the orchestrator can be coordinate complex operations ,that is a bit more =
than delegating. I have added the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Upon receiving a request to mitigate a DDoS attack p=
erformed over a target, the orchestrator, may evaluate the volumetry of the=
 attack as well as the value that represent the target.
 The orchestrator may select the DDoS Mitigation Service=C2=A0 Provider bas=
ed on the attack severity. It may also coordinate the DDoS Mitigation perfo=
rmed by the DDoS Mitigation Service=C2=A0 Provider with some other tasks su=
ch as for example,=C2=A0 moving the target to another
 network so new sessions will not be impacted.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal"><br>
12)<br>
The status of the DDoS mitigation indicates the orchestrator is in an analy=
zing phase.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Comment&gt; DOTS sign=
al channel draft does not indicate the mitigation status is in analyzing ph=
ase (Please see &quot;Table 2: Values of &#39;status&#39; Parameter&quot; i=
n the draft).<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose to remove:
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The status of the DDoS<br>
mitigation indicates the orchestrator is in an analyzing phase.<u></u><u></=
u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">13)<br>
The orchestrator begins collecting various information from various=C2=A0 t=
elemetry systems in order to correlate the measurements and provide=C2=A0 a=
n analysis of the event.<br>
Comment&gt; The orchestrator would anyway be collecting data from various t=
elemetry systems for correlation.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Agree. I think what I wanted to say that we may move=
 to a state where finer information is being monitored. I porposed the foll=
woing text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator begins collecting various informati=
on from various=C2=A0 telemetry systems in order to correlate the measureme=
nts and provide=C2=A0 an analysis of the event.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The orchestrator may begin collecting additional fin=
ed grain and specific information from various=C2=A0 telemetry systems in o=
rder to correlate the measurements and provide an analysis
 of the event.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">14) These systems are=
 configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<br>
<br>
Comment&gt; what do you mean by &quot;some measurement indicators&quot; and=
 &quot;specific reporting&quot; (looks vague to me) ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">measurement indicators means to me, some variables t=
hat we believe representative for threat detection, this typically involved=
 the traffic load, the number of SYNs...Specific reporting
 here indicates what the DOTS client refers to while triggering teh DDoS Mi=
tigation request. I propose teh follwointext:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 =C2=A0report a DOTS mitigation request to the orchestrator.=C2=A0 Th=
e DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with some element such as=
<br>
=C2=A0 =C2=A0specific reporting.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an<br>
=C2=A0 =C2=A0event or some measurement indicators reach a predefined level =
to<br>
=C2=A0 send DOTS mitigation request to the orchestrator.=C2=A0 The DOTS<br>
=C2=A0 =C2=A0mitigation request may be associated with additional informati=
on to let the orchestrator know what has triggered the request.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay (Mitigation hints (=E2=80=9Cadditional inf=
ormation=E2=80=9D) are optional and is not mandatory to be conveyed in the =
mitigation request).<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The following text has been added:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">These systems are configured so that when an event o=
r some measurement<br>
indicators reach a predefined level to send DOTS mitigation request to<br>
the orchestrator.=C2=A0 The DOTS mitigation request may be associated with<=
br>
some optional mitigation hints to let the orchestrator know what has <br>
triggered the request.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">15) Figure 4 (DDoS Or=
chestration) includes both internal and external DDoS mitigation systems, b=
ut the usage of internal and external DDoS mitigation systems in
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0not discussed in section 3.3.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following change in teh beginign of te=
h section:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices monitor a network - typically an ISP network. <u></u><u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">In this use case, one or more DDoS telemetry systems=
 or monitoring<br>
devices spread over one or multiple administrative domains provides health =
indicator of the network traffic to the orchestrator<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I also propose to indicate on the figure ( orchetsra=
tor adinistrative domain / other administraiev domains<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t understand the multiple adminis=
trative domain use case. Why would multiple ISPs use the same orchestrator =
?<u></u><u></u></p>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">The use case considers teh following administrative =
domains: ITP and Enterprise Network. I propose to simply replace internal b=
y Enterprise Network and external by ITP.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal">16) Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<br>
<br>
Comment&gt; You may want to clarify the scrubbed traffic is re-directed to =
the Enterprise network via the tunneling mechanism.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I propose the following text:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OLD:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection may be performed via tunneling mechanisms such as GR=
E for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
=C2=A0 =C2=A0Mitigation Service Provider typically involves BGP prefix<br>
=C2=A0 =C2=A0announcement eventually combined with DNS redirection, while r=
e-<br>
=C2=A0 =C2=A0injection to the enterprise network may be performed via tunne=
ling mechanisms such as GRE for<br>
=C2=A0 =C2=A0example.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] DNS redirection and BGP routing are two differe=
nt diversion techniques, DNS redirection is not required after BGP announce=
ment.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR]<u></u><u></u></p>
<p class=3D"MsoNormal">NEW:<u></u><u></u></p>
<p class=3D"MsoNormal">Redirection to the DDoS<br>
Mitigation Service Provider typically involves BGP prefix<br>
announcement or DNS redirection, while re-injection of the scrubbed traffic=
 to the enterprise network may be performed via tunneling mechanisms such a=
s GRE for<br>
example.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">=C2=A0<u></u><u></u><=
/p>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">17) Of course, such m=
echanisms needs to be regularly tested and<br>
=C2=A0 =C2=A0evaluated.<br>
<br>
Comment&gt; The above line does not look relevant to this document.<u></u><=
u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I am fine removing it.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] Okay.
<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Done<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<div>
<div>
<div style=3D"border:none;border-left:solid windowtext 1.5pt;padding:0in 0i=
n 0in 4.0pt;border-color:currentcolor currentcolor currentcolor blue">
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">18)=C2=A0 =C2=A0Once =
the requesting Enterprise Network is confident that the DDoS<br>
=C2=A0 =C2=A0attack has either ceased or has fallen to levels of traffic/<b=
r>
=C2=A0 =C2=A0complexity which they can handle on their own or that it has r=
eceived<br>
=C2=A0 =C2=A0a DOTS DDoS Mitigation termination request from a downstream<b=
r>
=C2=A0 =C2=A0Enterprise Network or DDoS Mitigation Service Provider, the<br=
>
=C2=A0 =C2=A0requesting Enterprise Network DOTS client sends a DOTS DDoS<br=
>
=C2=A0 =C2=A0Mitigation termination request to the DDoS Mitigation Service<=
br>
=C2=A0 =C2=A0Provider.<br>
<br>
Comment&gt; It&#39;s not clear how the requesting Enterprise network will l=
earn the DDoS attack has ceased ?<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">DOTS status may be used for example. I hope teh text=
 provided for (2) clarifies this.=C2=A0
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] You may want to rephrase the above line similar=
 to the new text you have provided for (2).<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&lt;/mglt&gt;
<u></u><u></u></p>
</div>
<blockquote style=3D"border:none;border-left:solid windowtext 1.0pt;padding=
:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;marg=
in-bottom:5.0pt;border-color:currentcolor currentcolor currentcolor rgb(204=
,204,204)">
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal">______________________________<wbr>_________________=
<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/dots</a><u></u><u></u></p>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/dots</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><br>
______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/dots</a><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>

<br>______________________________<wbr>_________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dots</a><br>
<br></blockquote></div><br></div>

--000000000000b38175056fa0c827--

