Switch from symmetric NAT to cone NAT
I've noticed that SIP doesn't work through Pfsense but it does work great through m0n0wall. I read it is because pfsense, for whatever reason, uses symmetric NAT instead of cone NAT.
Is there any way for me to switch it back to cone NAT? Why does pfsense use symmetric while m0n0 uses cone? With the popularity of VoIP i'd imagine that this is going to cause a lot of problems.