>
>
> On Monday, October 01, 2007 10:34:37 AM -0600 Danny McPherson
> <[EMAIL PROTECTED]> 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: [EMAIL PROTECTED]
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