tcp or udp

Kevin Darcy kcd at
Thu Jun 27 21:52:31 UTC 2002

Frank Liu wrote:

> Hi all,
> If I configure the fw to ONLY allow tcp port 53 to my nameservers,
> will it cause a problem for the clients and their resolver nameservers?
> I understand udp is more efficient. I just want to do if tcp will work.

You need to allow both protocols.

- Kevin

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