Asterisk usually not use TCP port 5222.
Your output is output of LOG destination in firewall, it can be any and INV_NOSYN here is prefix for logging. For more info you need check your firewall script, no way say which one.
Other option add firewall/iptables tag to this post, maybe firewall expert can say you which firewall script usually put such prefix.
For voice you need permit ports 10000-20000 udp( configurable in rtp.conf file). Also you need check it not NATed or NATed correctly.