Who does source address validation? (was Re: what's that smell?)

David Schwartz davids at webmaster.com
Wed Oct 9 23:51:19 UTC 2002



On Wed, 9 Oct 2002 15:53:40 -0400 (EDT), alex at yuriev.com wrote:

>>>Do you have experience of such breakage from your own customers? It
>>>would be interesting to hear details.

>>    Loss of ICMP packets generated by links with endpoints numbered in 
>>RFC1918
>>space. Holes in traceroutes, broken PMTU detection.

>Why do those links have endpoints in RFC1918 space to begin with?
>
>Alex

	Because some administrators are ignorant, clueless, or malicious. We don't 
all have the luxury of saying, "It doesn't work on our network and it does on 
our competitor's, and we could fix it if we wanted to at no significant harm 
to us, but we won't because we are in the right."

	DS





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