So this is the second time this has bitten me. I make sure I have everything setup properly so that I can transfer the DNS records from the primary DNS server to the secondary server. Everything is perfect right? I forget one last small detail. Not only do you need UDP port 53 open for DNS queries… but to do a zone transfer you also need TCP port 53 open as well.
Hopefully this post finds its way to another poor soul banging his head on his desk about the same thing.
Posted by Clint Modien
