Hello I am currently having a problem, that threatens to drive me insane... I cannot understand how Asterisk matches up a sip request with a peer. Here is my example: INVITE sip:87654321@192.168.100.4 SIP/2.0 Via: SIP/2.0/UDP 192.168.100.59:5060;branch=z9hG4bK00d97b99;rport From: "1088200336" <sip:1088200336@192.168.100.59>;tag=as54af3e4d To: <sip:87654321@192.168.100.4> Contact: <sip:1088200336@192.168.100.59> Call-ID: 2c7a6e5817c0706027e35268286ca7db@192.168.100.59 CSeq: 103 INVITE User-Agent: gw03 Max-Forwards: 70 Proxy-Authorization: Digest username="voipsip", realm="asterisk", algorithm=MD5, uri="sip:87654321@192.168.100.4", nonce="xxxx", response="xxxxx", opaque="" Date: Thu, 04 Jan 2007 17:38:27 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Type: application/sdp Content-Length: 242 v=0 o=root 1348 1349 IN IP4 192.168.100.59 s=session c=IN IP4 192.168.100.59 t=0 0 m=audio 11720 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - --- (14 headers 11 lines)--- Using INVITE request as basis request - 2c7a6e5817c0706027e35268286ca7db@192.168.100.59 Sending to 192.168.100.59 : 5060 (NAT) Found peer '12345678' Jan 4 18:38:28 NOTICE[19589]: chan_sip.c:10469 handle_request_invite: Failed to authenticate user "1088200336" <sip:1088200336@192.168.100.59>;tag=as54af3e4d Jan 4 18:38:28 NOTICE[19589]: chan_sip.c:10469 handle_request_invite: Failed to authenticate user "1088200336" <sip:1088200336@192.168.100.59>;tag=as54af3e4d Why does Asterisk identify this request as coming from the user 12345678 and not from the user voipsip as its clearly stated in the Proxy-Auth string???? The user 12345678 is registered on the server, coming from the same IP as voipsip, but if voipsip is a different user, why on earth does asterisk not identify it as voipsip instead of 12345678??? Some of the values and numbers are changed for security, etc. nonce="xxxx", response="xxxxx" and such. Kind Regards Jon Leren Sch?pzinsky