One-way Audio SIP

[andyalonzo]

My topology is this:

CLOUD -> Switch -> PBX (Asterisk)
                           '-> OPNSense -> Sip Client.

When making calls I can not hear the audio from the PBX.

This is what I tried:
- Switch to Manual Outbound NAT rule generation in NAT Firewall.
- Create a rule for static port.
Note: As similar to pfSense I have tried to follow the steps indicated on this page: https://doc.pfsense.org/index.php/Static_Port