Changing the port numbers that the SIP ALG listens on
Most SIP configurations use TCP or UDP port 5060 for SIP sessions and port 5061 for SIP SSL sessions. If your SIP network uses different ports for SIP sessions you can use the following command to configure the SIP ALG to listen on a different TCP, UDP, or SSL ports. For example, to change the TCP port to 5064, the UDP port to 5065, and the SSL port to 5066.
config system settings
set sip-tcp-port 5064
set sip-udp-port 5065
set sip-ssl-port 5066
end
You also configure the SIP ALG to listen in two different TCP ports and two different UDP ports for SIP sessions. For example, if you receive SIP TCP traffic on port 5060 and 5064 and UDP traffic on ports 5061 and 5065 you can enter the following command to receive the SIP traffic on all of these ports:
config system settings
set sip-tcp-port 5060 5064
set sip-udp-port 5061 5065
end