Hi all,          I have installed an asterisk server at 10.3.3.143:5080 and a kamailio at 10.3.3.85:5060. I am using sip communicator as softphone SIP Client. It is able to register at kamailio but the kamailio is not able to forward register request to asterisk. We have gone through the tutorial http://kb.asipto.com/asterisk:realtime:kamailio-3.0.x-asterisk-1.6.2-astdb and used the configuration file after changing the asterisk ip and kamailio ip. We found out that when a normal softphone authenticates directly to asterisk it sends and recieve |--softphone -- REGISTER |--asterisk -- 401 Unauthorised . CHallenge |--softphone -- REGISTER - Response to Challenge |--asterisk -- 200 OK (If response was correct) But I saw that when  kamailio forwards register to asterisk, it sends first REGISTER packet but doesn't second the second one. It sends SUBSCRIBE instead of REGISTER with response to the challenge. Regards, Sundeep Kumar Mishra _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users