North American Network Operators Group
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Re: Who does source address validation? (was Re: what's that smell?)

  • From: Joe Abley
  • Date: Wed Oct 09 13:14:20 2002


On Wednesday, Oct 9, 2002, at 11:36 Canada/Eastern, Stephen J. Wilcox wrote:

On Tue, 8 Oct 2002, Greg A. Woods wrote:
Such things REALLY _NEEED_ to be broken, and the sooner the better as
then perhaps the offenders will fix such things sooner too, because they
are by definition already broken and in violation of RFC 1918 and good
common sense.
Ok but real world calling. I have tried this and when customers find something
doesnt work on your network but it does on your competitor you make it work even
if that means breaking rules.
What services require transport of packets with RFC1918 source addresses across the public network?

I can think of esoteric examples of things it would be possible to do, but nothing that a real-world user might need (or have occasion to complain about).

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


Joe