When remote DSS servers/protectors and TRITON are not on the same network and servers/protectors are siting behind a NAT device deployment is failed.
Reason for that is that during registration the system record the actual IP address of the device but when the system tries to deploy to that IP address which is not reachable.
The feature should either allow to configure the NAT address during the registration process or when deploying the system should try first based on IP and if not successful then try based on FQDN.