I am wondering what ports to allow through Firewalld for SIP audio? I tried allowing ports 10000:20000 UDP, but when I try to call (as an example) my voicemail with Firewalld enabled, nothing comes through for SIP audio.
As a starting point, I tried to add just the native SIP service to Firewalled, and no go. Right now, I have ports 5060/5061 (I believe UDP/TCP) allowed through the firewall Firewalld service on my Debian 9 server.
As a starting point, I tried to add just the native SIP service to Firewalled, and no go. Right now, I have ports 5060/5061 (I believe UDP/TCP) allowed through the firewall Firewalld service on my Debian 9 server.