how to know what DNS server is being used

Steve Bertrand iaccounts at
Sat Oct 28 15:26:07 UTC 2006

> On my registrars site I have two DNS servers listing. How 
> would I know that 1) both are working. 2) which one is being used.


2) # tcpdump -n -i <iface> | grep .53 | grep

(where == the domain I want to find out if the server is
answering for)

Generally, you can do this on all of your name servers, and get a good
idea of which ones are handling DNS resolution at any particular time.


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