We have a hosted FreePBX that uses the responsive firewall for remote workers without a static home IP address. Is there a way that they can use FOP2 trough the firewall aswell? These remote workers cannot use a VPN to the PBX and I think that opening FOP2 to the whole world is a bad plan.
You can try add iptables rules manually, via the GUI. In that right side slide out menu thing in the Firewall go to > Advanced > Advanced Custom Rules. After you add your rules enable it in Advanced Settings > Custom Firewall Rules.
I don’t use firewall module so I can’t tell you if the custom rules are added before or after the rules getting in your way.
The rules are entered just like you would from the CLI, just omit the “iptables” part at the beginning. Ideally, they should have a tooltip there that explains that.