--On 06 March 2004 23:02 +0000 Paul Vixie <vixie@vix.com> wrote:
ok, i'll bite. why do we still do this? see the following from June 2001:
http://www.cctec.com/maillists/nanog/historical/0106/msg00681.html
Having had almost exactly that phrase in my peering contracts for $n years, the answer is because if you are A, and peer is B, if ( A>B ) your spoofed traffic comes (statistically) from elsewhere so you don't notice. You are dealing with traffic from C, where C>>A else you've signed their peering agreement, and are 'peering' on their terms instead. Was I going to pull peering with $tier1 from whom the occasional DoS came? Nope. The only way this was ever going to work was if the largest networks cascaded the requirements down to the smallest. And the largest networks were the ones for whom (quite understandably) rpf was most difficult. DoS (read unpaid for, unwanted traffic) is one of the best arguments against settlement-free peering (FX: ducks & runs). Alex