Why Does ICE Return Public IP in WebRTC but Private IP in MicroSIP?

[jcolp]

@Nando

a=candidate:Hc0a8014d 1 UDP 2130706431 192.168.1.77 4011 typ host
a=candidate:Hac1fd001 1 UDP 2130706175 172.31.208.1 4011 typ host
a=candidate:Hc0a83801 1 UDP 2130705919 192.168.56.1 4011 typ host
a=candidate:Hc0a8014d 2 UDP 2130706430 192.168.1.77 4003 typ host
a=candidate:Hac1fd001 2 UDP 2130706174 172.31.208.1 4003 typ host
a=candidate:Hc0a83801 2 UDP 2130705918 192.168.56.1 4003 typ host

These are the ICE candidates from MicroSIP.

@Nando

a=candidate:H87ec6c8f 1 UDP 2130706431 {Azure VM PUBLIC_IP} 10056 typ host
a=candidate:H87ec6c8f 2 UDP 2130706430 {Azure VM PUBLIC_IP} 10057 typ host

These are the ICE candidates from Asterisk.

Your network arrangement is complex, so you’re going to need to look at the actual traffic to understand what is going on and why it is failing to find a viable ICE yourself.