We have at least 2 domain servers set up for every site, such as site mysite.com.
Since the two DNS servers are on different local area networks, the firewall set up is a little different. One DNS server's firewall set up might not be as strict as the other one.
If the resolver fails to get the DNS info from the primary server, it will check the second DNS server, right?
Is it possible some resolver (or set up of the resolver) only query the primary DNS server, if it fails, it will not bother to query the second DNS server?
