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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