I have 3 publicly facing Windows DNS servers. On the master DNS server, in the properties of a zone I have configured the 'Zone Transfers' tab to be set to 'Allow Zone transfers only to servers listed in the Name Servers tab'. In the 'Name Servers' tab, I have the 3 servers listed with the corresponding public IPs.
When I am trying to initiate a 'Transfer from master' from one of the other DNS servers, I receive errors in the windows event log that says, 'the zone transfer was refused by the Master server'. I'm wondering if it's being refused because the request is coming from the internal IP address of the DNS server and not the public IP? Which IP (internal or external) is the correct one to enter in for the servers in the 'Name Servers' tab?