Hi Alexey, I guess that the client sent the REGISTER directly to the I-CSCF. In this case the P-Visited-Network-ID header field is not included, because it is inserted by the P-CSCF. But that is just a guess. You probably should configure the P-CSCF-address in the client correct to host=pcscf.net1.test and port=4060. In case of further troubles just add a tracefile created with “tcpdump -i any -s 3000 -w /var/tmp/trace.pcap”. BR Franz From: sr-users [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of ????????? ??????? Sent: Tuesday, April 19, 2016 3:19 PM To: sr-users(a)lists.sip-router.org Subject: [SR-Users] Kamailio IMS+FHoSS: Error "Visited Network Identity not found, responding with 400" Good afternoon! I use Kamailio from BOX from Article https://www.kamailio.org/w/2016/02/kamailio-ims-getting-started-box/ The client can not register (use Boghe IMS Client as IMS client) i-cscf log 10(1991) INFO: <script>: [REGISTER] from [sip:alice@net1.test] to [sip:alice@net1.test] 10(1991) ERROR: <script>: REGISTER (sip:alice@net1.test (10.0.0.10:1173 <http://10.0.0.10:1173> ) to sip:alice@net1.test, 9848450f-c6dd-5b5e-6516-addaf85a9f2f) 10(1991) ERROR: ims_icscf [registration.c:149]: I_perform_user_authorization_request(): ERR:I_UAR: Visited Network Identity not found, responding with 400 10(1991) ERROR: tm [t_lookup.c:1497]: t_get_trans_ident(): ERROR: t_get_trans_ident: no transaction found I would be glad of any help. Thank you. --------------------- Trushenkov Alexey