I have 2 DCs in two different locations connected via software VPN.
Both DCs run DNS server services on them.
However, one DC is behind an NAT router, so it only has a local address, while the other DC is behind a Cisco firewall co-located in a data center with both a public and a private IP.
The private IP works fine over the software VPN and can connunicate, however the co-located DC keeps updating it's DNS record for itself with both the public and the private IP address.
This is causing problems in the office where the NAT router sits because it tries to connect over a public IP when it should only be using the private IP.
I have tried to remove it in the DNS records, and it works perfectly.. However it keeps adding itself back in every couple of hours!
How can I stop this DNS server from updating itself with the public IP?