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2006 Oct 10
3
Understanding NAT Traversal
Quick question re. NAT traversal. I understand how sitting behind a NAT could cause problems for a SIP UA. The SIP UA would create SIP mesages using IP addresses from inside the network (i.e. 192.#.#.# or 10.#.#.#) and these IP addresses are of course unnavigable for the recipient. What I don't get is why don't web browsers suffer the same problem? A web brower behind a NAT sends an HTTP request much the same way as a SIP UA might send an INVITE. However it seems to me that in the case of the Web Browser, the HTTP request includes the IP address...