When you add an external server, Parallels Pro Control Panel updates the configuration file /etc/virtualhosting/masterconf
on the Parallels Pro Control Panel server with information about the external server. The information in this file is used by Parallels Pro Control Panel to communicate with the external server.
To add an external DNS server:
ns1.isp.net
.65.65.65.65
.wp_default_key.
(note that the dot is part of the key name).IC6GU6asxPceF72LjQTfUQ==
.Note: Usually, BIND name servers are configured to secure the zone updates using a transaction signature (TSIG) that uses a key/secret value pair. If your external server is running BIND, and is configured to protect zone updates using a key/secret value pair, enter the name of external server's key/secret value pair here. If your external server is also running Parallels Pro Control Panel, the key name you need to enter is wp_default_key. (the dot is part of the key name). The secret corresponding to that key can be obtained from the SOA Settings page on the control panel.
However, if your external name server is running another implementation of DNS, such as Microsoft DNS, chances are that it does not support the TSIG method of protecting zone updates. In this case, the external server must be configured to allow zone updates from your Parallels Pro Control Panel server, otherwise, the Parallels Pro Control Panel server will not be able to add records to any zone existing on the external name server.