ALG for STUN

PeterUK

The ALG STUN support is supported for a bridge or NAT the idea is to look at the packets that's connecting for STUN and allows them or else your firewall has to allow all outgoing but with ALG STUN its all taken care of a bit like how ALG FTP works.

https://www.netmanias.com/en/post/techdocs/6066/nat-network-protocol/nat-behavior-discovery-using-classic-stun-rfc-3489