Methods, systems, and computer readable media for regulating network address translator (nat) and firewall pinhole preservation traffic in a session initiation protocol (sip) network

A system for regulating network address translator (NAT) or firewall pinhole preservation traffic generated by session initiation protocol (SIP) user agent clients (UACs), the system comprising:

• a SIP entity including one or more processors, the SIP entity comprising:
• a registration store embodied in a computer readable medium accessible by the one or more processors, the registration store being configured for maintaining a list of contact information for a plurality of SIP UACs registering from behind at least one of a firewall and a NAT;
• and
• a SIP pinhole preservation traffic regulator executable by the one or more processors for iterating through the list to generate and send SIP messages to the different UACs such that the SIP messages to the different UACs are spaced at substantially regular intervals with respect to each other, wherein the SIP messages to the different UACs trigger responses from the UACs such that the responses are spaced at substantially regular intervals with respect each other.