Hi! I’m facing a strange issue I can’t get why happening. I have Freeswitch 1.4.26 server on a public IP. 2 users are registered - 201 and 202. 201 user is registered from address, that is from one subnet to public of Freeswitch. 202 - totally different. All 201 and 202 are behind NAT. So, I’m trying to call from 202 to 201, but getting USER_NOT_REGISTERED EXECUTE sofia/internal/202@pbx3.abbyconnect.com bridge(user/201@pbx3.abbyconnect.com) ….. 2017-03-01 15:13:32.989992 [NOTICE] switch_ivr_originate.c:2759 Cannot create outgoing channel of type [error] cause: [USER_NOT_REGISTERED] 2017-03-01 15:13:32.989992 [DEBUG] switch_ivr_originate.c:3747 Originate Resulted in Error Cause: 606 [USER_NOT_REGISTERED] 2017-03-01 15:13:32.989992 [NOTICE] switch_ivr_originate.c:2759 Cannot create outgoing channel of type [user] cause: [USER_NOT_REGISTERED] 2017-03-01 15:13:32.989992 [DEBUG] switch_ivr_originate.c:3747 Originate Resulted in Error Cause: 606 [USER_NOT_REGISTERED] But. freeswitch@internal> show registrations reg_user,realm,token,url,expires,network_ip,network_port,network_proto,hostname,metadata 201,pbx3.abbyconnect.com,jjrRmyMeA6NyWFDzw-2SgQ..,sofia/internal/sip:201@192.168.3.111:36490;rinstance=fdd02e2e94b8fba0;transport=tcp,1488403310,24.234.110.55,63940,tcp,pbx, 202,pbx3.abbyconnect.com,a707f9609d7fecf432d00074da1ef5cf@0:0:0:0:0:0:0:0,sofia/internal/sip:202@192.168.1.233:5060;transport=udp;registering_acc=pbx3_abbyconnect_com;fs_nat=yes;fs_path=sip%3A202%40176.104.49.75%3A5060%3Btransport%3Dudp%3Bregistering_acc%3Dpbx3_abbyconnect_com,1488400362,176.104.49.75,5060,udp,pbx, So, I see user is registered, but bridge is not trying to reach it. ( I see no INVITEs) But. When I’m moving this server to other IP, to not share same net with 201 extension, all works fine. at 201 I have same router as 202. Internal profile settings to NAT and networks aggressive-nat-detection [true] local-network-acl [localnet.auto] nat-options-ping [true] all-reg-options-ping [true] NDLB-force-rport [true] Thanks. Regards, Igor