Network troubleshooting, any experts?
Rodolfo J. Paiz
rpaiz at simpaticus.com
Wed Apr 28 21:20:17 UTC 2004
At 14:35 4/28/2004, you wrote:
>Does DNS resolve names through UDP? Would that explain why I can't telnet
>to port 53 on the DNS servers,yet still get name resolutions? Am I wrong
>conceptually
>on how DNS works?
DNS resolves queries when possible using UDP, and when the query is too
large for a UDP packet it can also use TCP. So udp/53 and tcp/53 must both
be open in order for DNS to work properly.
Cheers,
--
Rodolfo J. Paiz
rpaiz at simpaticus.com
http://www.simpaticus.com
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