DNS Ports

[Dave Harman]

Hi, NG

I am using BIND 9.2.1-16, the one that comes with RedHat 9
I am setting up Iptables and I am having difficulty in finding out
exactly what ports Bind uses to send and receive queries and data.

I know DNS uses UDP to send and get data. 

Does DNS always use the unprivileged ports to send queries ?

Does DNS always receive answers and quesies on port 53 ?

Does the resolver use different ports than the DNS server ?

Any answers will be appreciated

Dave Harman