nanog mailing list archives
Re: DNS problems to RoadRunner - tcp vs udp
From: Florian Weimer <fw () deneb enyo de>
Date: Sun, 15 Jun 2008 10:12:48 +0200
* Jon Kibler:
From what I have read, public DNS servers should support both UDP andTCP queries. TCP queries are often used when a UDP query fails, or if the answer is over a certain length.UDP is used for queries. TCP is used for zone transfers.
I've seen such claims countless times. 8-( However, you can perform zone file transfers over UFP in some cases (using IXFR), and TCP fallback may happen even if you never respond with packets with the TC bit set.
Current thread:
- Re: DNS problems to RoadRunner - tcp vs udp, (continued)
- Re: DNS problems to RoadRunner - tcp vs udp Sean Donelan (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Mike Lewinski (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Nathan Ward (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Mark Andrews (Jun 15)
- Re: DNS problems to RoadRunner - tcp vs udp Michael Sinatra (Jun 15)
- Re: DNS problems to RoadRunner - tcp vs udp Florian Weimer (Jun 15)
- Re: DNS problems to RoadRunner - tcp vs udp Nathan Ward (Jun 14)
- Re: DNS problems to RoadRunner - tcp vs udp Scott C. McGrath (Jun 16)
- Re: DNS problems to RoadRunner - tcp vs udp Joe Greco (Jun 15)
- Re: DNS problems to RoadRunner - tcp vs udp Roland Dobbins (Jun 15)