I am using tcpdump to confirm that, I am seeing traffic hit port 1443 on external firewall and on FreePBX so port forwarding is working. I don’t see any return packets coming from PBX thou.
No, I thought the responsive firewall handled that for me? 1443 and 1194 are port forwarded to PBX and is open to internet.
The night before the phone was working but had one way audio and the VPN connected automatically without issues, so I took another location, the phone had one way again, using tcpdump I could see return packets were going to home IP still. I assume this was programmed into phone still, so I factory restarted and phone would no get a reply back from FreePBX anymore.
I brought the Sangoma phone home again and plugged in and I see server replying! however it isn’t registering or using VPN like it did yesterday.
Update 20 mins later. I factory reset and now freepbx isn’t replying to phone. Acts like fail2ban is blocking responses but I don’t have anything blacklisted in intrusion detection