Some PIA gateways allow port forwarding.

Generally users achieve this via the PIA client on their local machine, however it is possible to do manually:
https://www.privateinternetaccess.co...anced-users/p1

Before moving to Untangle, I had it working successfully on a PfSense box:
https://forum.pfsense.org/index.php?topic=71725.0

Any thoughts on how best to achieve this on NG Firewall now we have the Tunnel VPN application?