I have a FreePBX OS installed with FreePBX’s official hosting partner OPL and since Covid everyone is working from home.
I have Responsive Firewall turned on, SIP Protocol enabled and Legacy SIP / IAX Disabled. I essentially add the IP addresses of everyone’s home to be Trusted (Excluded from Firewall), but the problem is that their IP address change often. My understanding was that it wouldn’t matter as once the phone is registered it’s whitelisted somehow, but everytime the employees’ IP address change, their phone no longer connects.
What’s the correct configuration for a WFH system where each client has a seldom changing IP address ?