I have tried to use Yeastar MyPBX SOHO as gateway for LAN users to access the internet, but it seems this is not possible. My reasons for trying this are:
1. MyPBX has a WAN and LAN port
2. It has a firewall configuration
3. IP forwarding is enabled (checking via SSH) - so it should be possible
4. It has OpenVPN client, so it could be handy to link to small offices via VPN
I tested this (with firewall enabled and disabled), but no response (ping, tracepath, wget). The request is not blocked, it seems either the request or response packets are simply discarded. Is there a way (or plugin) which I can use to allow this?