Question about port for NSLOOKUP

[Cricket Liu]

> I have a question I hope someone could help me with.  I'm trying to block
> "unused" tcp/ip ports on a server.  I'm able to successfully do that and
> leave port 53 open for DNS.  However, it appears that nslookup stops
working
> and can't find the "default" nameserver.
>
> Question:  What TCP/IP or UDP port does NSLOOKUP need to operate
> on besides port 53?  Does anyone know that.

nslookup sends queries from a dynamically assigned
ephemeral port to port 53.

cricket

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