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.
I can use https://USERID:PASSWORD@pbx.domain.com:1443/sangoma/0/fw500.rom locally and get the download prompt. Using this URL externally times out. Again, I see the request into PBX, but no reply.
FreePBX 22.214.171.124 (distro)