Re: Microsoft.com PMTUD black hole?

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Microsoft.com PMTUD black hole?
\ Nathan Anderson/FSR (6 May 2008)
. \ Brandon Butterworth (6 May 2008)
. . \ Iljitsch van Beijnum (6 May 2008)
. . . \ Nathan Anderson/FSR (6 May 2008)
. . . . \ Nathan Anderson/FSR (6 May 2008)
. . . . \ Iljitsch van Beijnum (7 May 2008)
. . . . . \ Nathan Anderson/FSR (7 May 2008)
. . . \ Bjørn Mork (7 May 2008)
. . \ Nathan Anderson/FSR (6 May 2008)
. \ Robert Bonomi (6 May 2008)
. . \ Tomas L. Byrnes (7 May 2008)
. . . \ Marshall Eubanks (7 May 2008)
. . . \ Nathan Anderson/FSR (7 May 2008)
. . \ Nathan Anderson/FSR (7 May 2008)
. . . \ Randy Bush (7 May 2008)
. . . \ Glen Turner (7 May 2008)
. . . . \ Mark Newton (7 May 2008)
. . . . \ Patrick Giagnocavo (7 May 2008)
. . . \ Rich Kulawiec (7 May 2008)
. . . . \ Nathan Anderson/FSR (7 May 2008)
. . . . . \ Michael Sinatra (7 May 2008)
. . . . . . \ Iljitsch van Beijnum (7 May 2008)
. . . . . . . \ Tomas L. Byrnes (7 May 2008)
. . . . . . . . \ Nathan Anderson/FSR (7 May 2008)
. . . . . . . . . \ Iljitsch van Beijnum (7 May 2008)
. . . . . . . . . . \ Nathan Anderson/FSR (7 May 2008)
. . . . . . . . . \ Tomas L. Byrnes (7 May 2008)
. . . . . . . . . . \ Iljitsch van Beijnum (7 May 2008)
. . . . . . . . . . . \ Tomas L. Byrnes (7 May 2008)
. . . . . . . . . . \ Nathan Anderson/FSR (7 May 2008)
. . . . . . . \ Tomas L. Byrnes (7 May 2008)
. . . . . . . . \ Nathan Anderson/FSR (7 May 2008)
. . . . . . . \ Bjørn Mork (8 May 2008)
. . . . . . . . \ Joel Jaeggli (8 May 2008)
. . . . . . . . . \ Iljitsch van Beijnum (8 May 2008)
. . . . . . . . . . \ Smith, Donald (8 May 2008)
. . . . . . \ Hank Nussbacher (8 May 2008)
. . . . . \ Deepak Jain (7 May 2008)
. . . . . . \ SML (7 May 2008)
. . . . . . \ Tony Finch (8 May 2008)
. . . . . . . \ Blaine Christian (8 May 2008)
. . \ Stephen Sprunk (7 May 2008)
. \ Iljitsch van Beijnum (7 May 2008)
. \ Nathan Anderson/FSR (7 May 2008)
. . \ Tomas L. Byrnes (7 May 2008)
. . . \ Nathan Anderson/FSR (7 May 2008)
. . . \ Matthew Petach (12 May 2008)
. \ Michael Sinatra (7 May 2008)
. \ Scott Weeks (8 May 2008)
. \ Janet Sullivan (8 May 2008)
. . \ Niels Bakker (8 May 2008)

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Subject:	Re: Microsoft.com PMTUD black hole?
Group:	Nanog
From:	Joel Jaeggli
Date:	8 May 2008

Bjørn Mork wrote:
> Iljitsch van Beijnum <iljitsch> writes:

<snip>

> After all, Microsoft must have a reason to block all icmp. Or?
>
>> However, in that case the only workable course of action would be TO
>> DISABLE PATH MTU DISCOVERY!
>>
>> You can't have your cake and eat it too.
>
> But maybe the death of icmp is worth some sort of ceremony? Cake or
> not.

Oddly enough there is a draft on the subject of icmp filtering
recomendations is making the rounds.

http://tools.ietf.org/wg/opsec/draft-gont-opsec-icmp-filtering-00.txt

The opsec working group (opsec) and the authors would
appreciate feedback from operators on the subject.

thanks
joelja

> Bjørn
>
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