IP Address in SIP headers may need to be different depending on the context.

[tayler6000]

Currently, everything runs off of one IP address which is the bind IP address. This is a problem as many people use 0.0.0.0 and any UAS/UAC that is trying to use headers to send a response would fail. Ideally, we would have four options, a bind IP address, a private network IP address, a private network subnet mask, and a public IP address or hostname.

In this way, we would have a bind address which can be 0.0.0.0, then when attempting to originate a call it will see if the IP address that is being connected to is outside of the private network with the private network IP address/subnet mask, and use either the private IP or hostname.

This change is being added to 2.0.