Also for anyone who’s interested, I did put this in the /etc/firewall-4.rules to allow the endpoints to run on 45060 and convert at the firewall into 5060. Seems to work domestically but I’ve had one-way audio issues when used with philippines clients. I was trying this so I could have time to convert all my endpoints to 45060 and when done convert Freepbx to 45060.
-I FORWARD -o eth0 -p udp -m udp --dport 45060 -j ACCEPT
-t nat -A PREROUTING -i eth0 -p udp --dport 45060 -j REDIRECT --to-port 5060