Dear all, I'm trying to register Kamailio (version 3.1.3) to different VoIP provider but I always receive a 401 unauthorized even if I use valid credentials. I post below two different capture of the registration to the same VoIP provider using the same credentials (SIP domain 94.23.56.123, SIP auth username 1028), with a Blink softphone (successful) and with Kamailio 3.1.3 (denied). The public IP address of my Kamailio is anonymized with XXXXXXXX: ------ Blink softphone -------- REGISTER sip:94.23.56.123 SIP/2.0 Via: SIP/2.0/UDP 192.168.2.1:49186;rport;branch=z9hG4bKPjGtybPeuocgJbvOZlRNoWG3RPL0peCs31 Max-Forwards: 70 From: "ItaliADSL" <sip:1028@94.23.56.123>;tag=Tid9EUBxo3Bc5Eo0xzaMg82Vk8q7J57j To: "ItaliADSL" <sip:1028@94.23.56.123> Contact: <sip:alybrkhq@192.168.2.115:49186> Call-ID: cdr3Rr05eEs0voSSZ275zLxVF.Eo74mo CSeq: 1 REGISTER Expires: 600 User-Agent: Blink 0.22.2 (MacOSX) Content-Length: 0 SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP 192.168.2.1:49186;branch=z9hG4bKPjGtybPeuocgJbvOZlRNoWG3RPL0peCs31;received=95.248.232.55;rport=49186 From: "ItaliADSL" <sip:1028@94.23.56.123>;tag=Tid9EUBxo3Bc5Eo0xzaMg82Vk8q7J57j To: "ItaliADSL" <sip:1028@94.23.56.123>;tag=as5a82d867 Call-ID: cdr3Rr05eEs0voSSZ275zLxVF.Eo74mo CSeq: 1 REGISTER User-Agent: MOR Softswitch Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="6afe07ca" Content-Length: 0 REGISTER sip:94.23.56.123 SIP/2.0 Via: SIP/2.0/UDP 192.168.2.1:49186;rport;branch=z9hG4bKPj.JA-9Zf0dpKV6v0JmKtOGSMhyNw5ep1w Max-Forwards: 70 From: "ItaliADSL" <sip:1028@94.23.56.123>;tag=Tid9EUBxo3Bc5Eo0xzaMg82Vk8q7J57j To: "ItaliADSL" <sip:1028@94.23.56.123> Contact: <sip:alybrkhq@192.168.2.115:49186> Call-ID: cdr3Rr05eEs0voSSZ275zLxVF.Eo74mo CSeq: 2 REGISTER Expires: 600 User-Agent: Blink 0.22.2 (MacOSX) Authorization: Digest username="1028", realm="asterisk", nonce="6afe07ca", uri="sip:94.23.56.123", response="f3489b3c8510f39bcf3d1fd96b8836fb", algorithm=MD5 Content-Length: 0 SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.2.1:49186;branch=z9hG4bKPj.JA-9Zf0dpKV6v0JmKtOGSMhyNw5ep1w;received=95.248.232.55;rport=49186 From: "ItaliADSL" <sip:1028@94.23.56.123>;tag=Tid9EUBxo3Bc5Eo0xzaMg82Vk8q7J57j To: "ItaliADSL" <sip:1028@94.23.56.123>;tag=as5a82d867 Call-ID: cdr3Rr05eEs0voSSZ275zLxVF.Eo74mo CSeq: 2 REGISTER User-Agent: MOR Softswitch Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces Expires: 600 Contact: <sip:alybrkhq@192.168.2.115:49186>;expires=600 Date: Sun, 08 May 2011 20:16:58 GMT Content-Length: 0 ----------- Kamailio 3.1.3 ---------------- REGISTER sip:94.23.56.123 SIP/2.0 Via: SIP/2.0/UDP XXXXXXXXXXX;branch=z9hG4bK58b4.3ac3b834.0 To: sip:1028@94.23.56.123 From: sip:1028@94.23.56.123;tag=464474ecb420f5357c1361be147933f0-45fd CSeq: 10 REGISTER Call-ID: 6efffe60-27704@XXXXXXXXXXXX Content-Length: 0 User-Agent: kamailio (3.1.3 (i386/linux)) Contact: <sip:1028@XXXXXXXXXX> Expires: 360 SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP XXXXXXXXXX;branch=z9hG4bK58b4.3ac3b834.0;received=XXXXXXXXXX From: sip:1028@94.23.56.123;tag=464474ecb420f5357c1361be147933f0-45fd To: sip:1028@94.23.56.123;tag=as322a1728 Call-ID: 6efffe60-27704@XXXXXXXXXXX CSeq: 10 REGISTER User-Agent: MOR Softswitch Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="5f3ee3e8" Content-Length: 0 REGISTER sip:94.23.56.123 SIP/2.0 Via: SIP/2.0/UDP XXXXXXXXXX;branch=z9hG4bK7666.c1b2e93.0 To: sip:1028@94.23.56.123 From: sip:1028@94.23.56.123;tag=464474ecb420f5357c1361be147933f0-1f9c CSeq: 10 REGISTER Call-ID: 6efffe60-27697@XXXXXXXXXXX Content-Length: 0 User-Agent: kamailio (3.1.3 (i386/linux)) Contact: <sip:1028@XXXXXXXXXXX> Expires: 360 Authorization: Digest username="1028", realm="asterisk", nonce="5f3ee3e8", uri="sip:94.23.56.123", response="df6ebfa9b5870b8b912d1e3b53eedc62", algorithm=MD5 SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP XXXXXXXXX;branch=z9hG4bK7666.c1b2e93.0;received=XXXXXXXXX From: sip:1028@94.23.56.123;tag=464474ecb420f5357c1361be147933f0-1f9c To: sip:1028@94.23.56.123;tag=as529fc11d Call-ID: 6efffe60-27697@XXXXXXXXXX CSeq: 10 REGISTER User-Agent: MOR Softswitch Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO Supported: replaces WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="41f3fe77" Content-Length: 0 -------------------------------------- As you can see from the captures, Blink softphone successfully registrates with VoIP provider while Kamailio's request is rejected. I tried to analize the two flows of SIP messages but I didn't notice any difference between them so I can't understand why Kamailio is not able to register. Can anybody help me to solve this issue? greetings, Pierpaolo