nanog mailing list archives
Re: DNS problems to RoadRunner - tcp vs udp
From: Mike Lewinski <mike () rockynet com>
Date: Fri, 13 Jun 2008 12:22:07 -0600
Jon Kibler wrote:
UDP is used for queries. TCP is used for zone transfers. If my server responded to TCP queries from anyone other than a secondary server, I would be VERY concerned.
That is a common, but incorrect, assumption.DNS responses that are larger than the MTU of a single UDP packet are sent as TCP.
Back in the day (c. 1998) Microsoft had some arpa zones that they felt it necessary to create hundreds of PTRs per entry. Of course, they denied TCP to their nameservers. The end result is that our BIND8 server was crashing on the lookups (it was a crappy port to NT).
Current thread:
- DNS problems to RoadRunner - tcp vs udp Mark Price (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Jon Kibler (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Valdis . Kletnieks (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Valdis . Kletnieks (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Mike Lewinski (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Seth Mattinen (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Kevin Oberman (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Jon Kibler (Jun 13)
- RE: DNS problems to RoadRunner - tcp vs udp Tomas L. Byrnes (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Justin Shore (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Justin Shore (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Robert E. Seastrom (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Simon Leinen (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Randy Bush (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Valdis . Kletnieks (Jun 13)
- Re: DNS problems to RoadRunner - tcp vs udp Jon Kibler (Jun 13)