Interop issue: Fanvil door phone not sending ACK in response to OK; potential 127.0.0.1 address conflict

[psanders]

Describe the bug

During a recent interop test between a Fanvil door phone and Zoiper, the Door Phone did not send back an ACK after receiving an OK.

To Reproduce

(Needs update)

Expected behavior

The door phone should return an ACK, consistent with the behavior of other softphones.

Screenshots
NA

System information (please complete the following):

Server version: 2.1.14

Additional context

By setting the localnets parameter in the EdgePort to an empty array [], I managed to restore proper signaling. This leads me to believe that the issue might be related to the 127.0.0.1 address, which was automatically added to the list of entries. As part of this triage, we need to determine if this address should be omitted and assess if there are any scenarios where this address might be necessary.