[105161] in North American Network Operators' Group
Re: DNS problems to RoadRunner - tcp vs udp
daemon@ATHENA.MIT.EDU (Jon Kibler)
Fri Jun 13 14:15:43 2008
Date: Fri, 13 Jun 2008 14:14:55 -0400
From: Jon Kibler <Jon.Kibler@aset.com>
To: Mark Price <mprice@tqhosting.com>
In-Reply-To: <61b6fbec0806131111u77606e1bu90bcd102c3217fb4@mail.gmail.com>
Cc: nanog@merit.edu
Reply-To: Jon.Kibler@aset.com
Errors-To: nanog-bounces@nanog.org
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Mark Price wrote:
<SNIP>
>>From what I have read, public DNS servers should support both UDP and
> TCP 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.
If my server responded to TCP queries from anyone other than a secondary
server, I would be VERY concerned.
Jon Kibler
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Jon R. Kibler
Chief Technical Officer
Advanced Systems Engineering Technology, Inc.
Charleston, SC USA
o: 843-849-8214
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