Patent ID: 8533339

Claim:
A method comprising: sending a Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs) (STUN) request to a publicly accessible server that identifies publicly addressable network addresses to endpoints; receiving back an initial response that identifies a publicly addressable network address associated with an originating source of the STUN request, wherein the initial response includes a STUN cookie that identifies the request as STUN traffic; determining whether the initial response includes any additional addresses; comparing the publicly addressable network address from the initial response to a local network address; sending a new STUN request to a network address translating security device using the publicly addressable network address from the initial response if the network address thereof is different than the local network address; receiving back a new response; comparing, to the local network address, a network address from the new response to the newest STUN request; and if there is no match, repeating the sending using the network address from a most recent response and said address comparison based thereon until a match is obtained.