On Sun, 15 Aug 2010 18:46:49 +0200, Florian Weimer said: > > And that connection that's trying to use PMTU got established across the > > commodity internet, how, exactly? ;) > > ICMP "fragmentation needed, but DF set" messages carry the a addresses > of intermediate routers which generate them (potentially in response > to MTU drops) as source addresses, not the IP addresses of the peers > in a connection.
If any long-haul carriers are originating ICMP packets for other people's consumption from 1918 addresses rather than addresses in their address space, it's time to name-n-shame so the rest of us can vote with our feet and checkbooks. There's no excuse for that in this day and age.
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