Hello all, I'm having a strange NAT problem. My Freeswitch server has a public ip and the endpoints which are Polycom IP 650s are all behind NAT with mainly Netgear SRX 5308 routers at multiple locations. The server is on a public class C network and one of the locations has its router on the same class C. I.e x.x.x.7/24-router, x.x.x.240/24-server. I'm only experiencing this with 2 of about 30 extensions. The first endpoint to register from this location gets detected as NAT but the others with the ports remapped do not. This maybe explains it better: Call-ID: 4feea796-bd96e2ed-e16d27ac@10.6.71.103 User: 1103@x.x.x.240 Contact: "user" <sip:1103@10.6.71.103;received=x.x.x. 7:5060;fs_nat=yes;fs_path=sip%3A1103%40x.x.x.7%3A5060> Agent: PolycomSoundPointIP-SPIP_650-UA/3.3.1.0769 Status: Registered(UDP-NAT)(unknown) EXP(2011-02-18 11:15:47) EXPSECS(1143) Host: pbx10.5ninesolutions.com IP: x.x.x.7 Port: 5060 Auth-User: 1103 Auth-Realm: pbx10.5ninesolutions.com MWI-Account: 1103@x.x.x.x Call-ID: d21b71b2-75baa80d-768c0b08@10.6.71.104 User: 1101@x.x.x.240 Contact: "user" <sip:1101@10.6.71.104> Agent: PolycomSoundPointIP-SPIP_650-UA/3.3.1.0769 Status: Registered(UDP)(unknown) EXP(2011-02-18 11:16:48) EXPSECS(1204) Host: pbx10.5ninesolutions.com IP: x.x.x.7 Port: 1036 Auth-User: 1101 Auth-Realm: pbx10.5ninesolutions.com MWI-Account: 1101@x.x.x.x Call-ID: a74e61a6-1863ea7d-789686c4@10.6.71.105 User: 1102@x.x.x.240 Contact: "user" <sip:1102@10.6.71.105> Agent: PolycomSoundPointIP-SPIP_650-UA/3.3.1.0769 Status: Registered(UDP)(unknown) EXP(2011-02-18 11:17:23) EXPSECS(1239) Host: pbx10.5ninesolutions.com IP: x.x.x.7 Port: 1036 Auth-User: 1102 Auth-Realm: pbx10.5ninesolutions.com MWI-Account: 1102@x.x.x.x Call-ID: 100b5148-6a47060a-13c4-50029-c844-22fc4dd3-c844 User: 1801@97.67.110.240 Contact: "user" <sip:1801@10.6.71.106:5060> Agent: MP201 B 1FXS/3.0.1_build_19 Status: Registered(UDP)(unknown) EXP(2011-02-18 11:26:23) EXPSECS(1779) Host: pbx10.5ninesolutions.com IP: 97.67.110.7 Port: 1036 Auth-User: 1801 Auth-Realm: pbx10.5ninesolutions.com MWI-Account: 1801@x.x.x.x ------- Another Location ---- Call-ID: dca2a276-4eb94f97-c55177b0@10.1.10.186 User: 4204@x.x.x.240 Contact: "user" <sip:4204@10.1.10.186;received=x.x.x.x: 5060;fs_nat=yes;fs_path=sip%3A4204%40x.x.x.x%3A5060> Agent: PolycomSoundStationIP-SSIP_5000-UA/3.3.1.0769 Status: Registered(UDP-NAT)(unknown) EXP(2011-02-18 11:28:04) EXPSECS(1880) Host: pbx10.5ninesolutions.com IP: x.x.x.x Port: 5060 Auth-User: 4204 Auth-Realm: pbx10.5ninesolutions.com MWI-Account: 4204@x.x.x.x The port and IP are detected correctly but the contact is a private IP. Any clue as to why the two extension 1101 and 1102 are any different? Thanks, Spencer