[NANOG] Microsoft.com PMTUD black hole?

Thu May 8 07:53:23 UTC 2008

Bjørn Mork wrote:
> Iljitsch van Beijnum <iljitsch at muada.com> 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 at ietf.org) and the authors would 
appreciate feedback from operators on the subject.

thanks
joelja

> Bjørn
> 
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