IAX2 Trunk(s) between two (or more) FreePBX Servers

Hi,

No Need to verify the public IP for that. Just make sure the servers will register to each other.
in the trunk settings you can set host=dynamic and configure a user name and password for the trunks.
In the case of an IAX trunk you will need to forward port 4569 udp from your router to your Asterisk pbx.

You can use my example of IAX trunk configuration for static IPs:

All the configuration is case sensitive.

First Server:

Trunk Name: Second Server
    
    Trunk Name: SECOND-SERVER
    
    Peer details:

    host=ip_second_server
    username=FIRST-SERVER
    secret=some_secret
    type=friend
    context=from-internal
    transfer=no
    allow=alaw&ulaw
    disallow=all

Second Server:

Trunk Name: First Server

    Trunk Name: FIRST-SERVER
    
    Peer details:

    host=ip_first_server
    username=SECOND-SERVER
    secret=some_secret
    type=friend
    context=from-internal
    transfer=no
    allow=alaw&ulaw
    disallow=all

There is no need for the user details.

Thank you,

Daniel Friedman
Trixton LTD.

Mobile: +41.79.868.7050
Email: dani@3xton.com