FreePBX 17 on Google Cloud

[pbxuser1972]

I installed FreePBX 17 on Google Cloud. The PBX can connect to a trunk and register a phone but cannot make outbound calls. I was told that the invite did not have the correct IP address - It was a private Google Internal IP and the audio was not routing back to the public IP address. I changed the IP in the trunk “from field” but still no-go.

Do I need to forward more ports in both the Google Firewall and my modem?

Any help would be greatly appreciated?

[TaylorDurden (Taylor Letham)]

Did you check Settings>Asterisk Sip Settings>NAT Settings(Detect)?

[jfinstrom (James Finstrom)]

Google cloud network settings

I’m not very familiar with the ‘new’ GCP firewall, but please try the following: In Asterisk SIP Settings, General tab, NAT settings, click Detect Network Settings. External Address should populate with your 34.92.xx.xxx address and Local Networks should fill in your 10.x.x.x LAN address. On the chan_pjsip tab, leave External IP Address and Local network blank. Submit. Restart Asterisk. From a pjsip extension (assuming it registers ok), make a test call to *43 (echo test). If there is no …

[VoipMC]

On GCP I use a private IP and a public IP, on the firewall I open the udp ports 10000-20000 incoming and only the port 5060 towards the carrier for the registration of the sip trunk in udp for outgoing, for the phones instead to not leave the port 5060 exposed, I changed the port with a high number and set TLS and naturally open for incoming connections