> > > On Monday, October 01, 2007 10:34:37 AM -0600 Danny McPherson > <danny@xxxxxxx> wrote: > > > Note that in real deployments just this behavior has broken things > > on occasion, as many firewall and other such policy application points > > assume things like DNS resolution will only be UDP/53 transactions. > > Yeah; I'm getting a little tired of having our protocols redefined based on > the incorrect assumptions of people who don't understand them. The DNS > sometimes uses TCP, UDP flows can last more than one round trip, and ICMP > unreachable messages are an essential part of IP; vendors and operators who > assume otherwise should be made to fix their assumptions, instead of > everyone else having to cripple their applications and networks to make the > assumptions true. > > -- Jeff And IP fragnments exist and are useful. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@xxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf