Internal DNS Resolution over VPN

If you are running an internal DNS server(s) and need DNS resolution for internal hosts over VPN, you will need to add a Domain DNS Server entry on the NG Firewall for your internal DNS server(s) to resolve hostnames. By going to Config > Network > DNS Server, you can add the necessary domain servers in your environment for resolution.

Additionally, you can add static DNS entries per server or device if there are only a few that you would like to resolve, such as a mail server in your environment.