I've just been getting into this as well, and I've run into the same problem.
It looks like the only solutions so far are to use a SIP client that supports STUN (the SNOM 100 supports this), or that supports UPnP (with a NAT router that supports UPnP). For Linux NAT routers, there's an ip_masq module for 2.2 Kernels called ip_masq_sip that's supposed to do the trick. I'm in the process of trying this masq module to see if it works. If the Asterisk server itself is behind a NAT router, then that's a whole new problem. -wade > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:asterisk-users- > [EMAIL PROTECTED] On Behalf Of Matthew Farley > Sent: Wednesday, March 05, 2003 4:08 PM > To: [EMAIL PROTECTED] > Subject: [Asterisk-Users] Known SIP - NAT Solutions? > > I have recently begun experimenting with Asterisk, and have been > mightily impressed by its capabilities and flexibility. I have run > across one problem, however, that challenges my ability to use it as a > production system. > > My Asterisk box has a public Internet IP, and works great with SIP > (ATA 186) clients that also have public IP addresses. Unfortunately, > most of the locations that I would like to put these SIP phones into are > behind NAT. Calls placed from behind NAT are consistantly unsuccessful. > I have read in several places that there are software solutions to this > problem, though I have found no specific references to precisely what > software to use, or how it should be configured to hand these calls off > to Asterisk. > > Has anyone on the list successfully overcome this limitation? If > so, any advice you might be able to provide would be greatly > appreciated. > > Thanks! > > Sincerely, > Matthew Farley > [EMAIL PROTECTED] > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users