I have a 3cx server behind a pfsense router. Most of my users are remote except myself and this one other guy. so I use my cell phone for calls, but that 1 guy? yeah, he's old school. He has a desk phone!
Well, all my users are on SBCs so when a phone needs provisioning, it just works. but here, it does not. The one lonely phone on prememsis died recently (was provisioned before the pfsense router was installed) and now I cant get a phone to detect in the phone switch to save my life. This is an issue I have dealt with plenty of times, but never on pfsense. AFAIK, this happens when multicast isnt working... but I have no idea how to configure for multicast in pfsense.
Honestly, I have no idea how multicast works. I thought it was just an application broadcasting out and asking what server handles a specific protocol (in this case SIP)... am I wrong? Can ANYONE link me a guid for this, or better yet, just tell me what rule I need to make multicast happy?
Presently I just have the minimal rules set on LAN1. But I DO have an alias for the sip server and the relevant ports forwarded from outside (as described here.)... I thought that would be it...