Hi Tuan Path doesn't do NAT traversal (although it plays a role) so it isn't a replacement for fix_nated_contact and fix_nated_register. The best approach is to replace them with add_contact alias and handle_ruri_alias.
Also be sure to set the advertised address on External A: listen=192.168.1.10:5060 advertise 1.2.3.4:5060 you can find a tutorial here<http://sip-router.org/wiki/tutorials/alias-example>and if you search the list you should find my questions on the topic. Richard PS: You'll need to use version > 3.3. On 9 January 2013 09:39, Nguyen Anh Tuan <tuan...@vnpt-technology.vn> wrote: > Hi All,**** > > ** ** > > I have 2 interfaces - External A (behind NAT) and Internal B (LAN) in > Kamailio Load Balance, and enable Multi-Homing function “mhomed=1”. **** > > Load Balance dispatches to Kamailio SIP Servers via the Internal B (LAN) > (each Kamailio SIP server has both proxy and registrar in one box). For RTP > relay, I use RTPproxy in other server, has 2 interfaces A&B like Load > Balance. **** > > ** ** > > If using 2 interfaces in Load Balance, Registration and calling NORMAL > with 2 users behind NAT, but the call will be interrupted after 30 seconds > due to the ACK message (after Ringing, 200 OK) STOP in Load Balance in > return and not relayed to other UA . CANCEL and BYE have same error like > ACK.**** > > ** ** > > I tried using only one interface for load balancing (External = Internal > IP), and SIP Server binds to Load Balance in the same network, EVERYTHING > IS OK. ACK, CANCEL and BYE are not missing behind NAT.**** > > ** ** > > For NAT Traversal I use PATH Module in Load Balance, and add “Received” > like this:**** > > ...**** > > modparam("path", "use_received", 1)**** > > ..**** > > ..**** > > record_route();**** > > add_path_received();**** > > force_rport();**** > > t_relay;**** > > ..**** > > ..**** > > ** ** > > And in SIP Server enable Path Parameter for Registrar:**** > > modparam("registrar", "use_path", 1)**** > > modparam("registrar", "path_mode", 1)**** > > modparam("registrar", "path_use_received", 1)**** > > ** ** > > **** > > Enable “#!define WITH_NAT” in default kamailio.cfg for RTP Controlling, > but I removed all fix_nated_register and fix_nated_contact in SIP Server, > because using PATH module.I try enable both fix_nat_register and > fix_nated_contact, or only fix_nat_register but NOT SOLVE Problem “missing > ACK,CANCEL, and BYE in Load Balance” behind NAT.**** > > ** ** > > Best Regard, **** > > ** ** > > Tuan.**** > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > >
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