Hi Folks, I am implementing a SIP ua and have been testing it against the SER proxy which works fine. So my next step is to test is with Asterisk and I run into a problem. I can REGISTER my UA with authentication, no problem but the Asterisk does not accepts my credentials in the INVITE. I have checked my username and password with the sip.conf file (secret=...) and it looks ok. You can find the messages below. Any ideas? Martin The trace: My UA sends the INVITE to Asterisk: INVITE sip:2300@Asterix SIP/2.0 Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276428-27856 From: "4302" <sip:4302@Asterix>;tag=27642829233 To: <sip:2300@Asterix> Call-ID: 27642811596@192.168.1.126 CSeq: 20 INVITE Contact: <sip:4302@192.168.1.126:5060> Max-Forwards: 70 User-Agent: My UA Privacy: none P-Preferred-Identity: "4302" <sip:4302@Asterix> P-Preferred-Identity: <tel:4302> Allow: INVITE, ACK, CANCEL, BYE, OPTIONS Content-Type: application/sdp Accept: application/sdp Content-Length: 234 v=0 o=iS3000 0 0 IN IP4 192.168.1.216 s=- c=IN IP4 192.168.1.216 t=0 0 m=audio 49368 RTP/AVP 0 8 18 96 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:18 G729/8000 a=rtpmap:96 telephone-event/8000 a=ptime:40 a=sendrecv Asterisk challenges the INVITE: 407 Proxy Authentication Required Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276428-27856;received=10.20.0.1;rport=1025 From: "4302" <sip:4302@Asterix>;tag=27642829233 To: <sip:2300@Asterix>;tag=as385f1a51 Call-ID: 27642811596@192.168.1.126 CSeq: 20 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER Contact: <sip:2300@10.20.0.2:5068> Proxy-Authenticate: Digest realm="asterisk.SipTux2", nonce="52beb24a" Content-Length: 0 ACK sip:2300@Asterix SIP/2.0 Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276428-27856 From: "4302" <sip:4302@Asterix>;tag=27642829233 To: <sip:2300@Asterix>;tag=as385f1a51 Call-ID: 27642811596@192.168.1.126 CSeq: 20 ACK Max-Forwards: 70 User-Agent: iS3000 SIP Server, Philips Business Communications Content-Length: 0 INVITE again with credentials from my UA: INVITE sip:2300@Asterix SIP/2.0 Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276429-6368 From: "4302" <sip:4302@Asterix>;tag=2764299705 To: <sip:2300@Asterix> Call-ID: 27642931630@192.168.1.126 CSeq: 20 INVITE Contact: <sip:4302@192.168.1.126:5060> Proxy-Authorization: Digest username="4302", realm="asterisk.SipTux2", nonce="52beb24a", uri="sip:2300@Asterix", response="9c3f59f925a7feb47e0631735d103c88", algorithm=MD5 Max-Forwards: 70 User-Agent: My UA Privacy: none P-Preferred-Identity: "4302" <sip:4302@Asterix> P-Preferred-Identity: <tel:4302> Allow: INVITE, ACK, CANCEL, BYE, OPTIONS Content-Type: application/sdp Accept: application/sdp Content-Length: 234 v=0 o=iS3000 0 0 IN IP4 192.168.1.216 s=- c=IN IP4 192.168.1.216 t=0 0 m=audio 49368 RTP/AVP 0 8 18 96 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:18 G729/8000 a=rtpmap:96 telephone-event/8000 a=ptime:40 a=sendrecv SIP/2.0 407 Proxy Authentication Required Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276429-6368;received=10.20.0.1;rport=1025 From: "4302" <sip:4302@Asterix>;tag=2764299705 To: <sip:2300@Asterix>;tag=as64b1c17b Call-ID: 27642931630@192.168.1.126 CSeq: 20 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER Contact: <sip:2300@10.20.0.2:5068> Proxy-Authenticate: Digest realm="asterisk.SipTux2", nonce="7a055f95" Content-Length: 0 ACK sip:2300@Asterix SIP/2.0 Via: SIP/2.0/UDP 192.168.1.126:5060;branch=z9hG4bK-276429-6368 From: "4302" <sip:4302@Asterix>;tag=2764299705 To: <sip:2300@Asterix>;tag=as64b1c17b Call-ID: 27642931630@192.168.1.126 CSeq: 20 ACK Proxy-Authorization: Digest username="4302", realm="asterisk.SipTux2", nonce="52beb24a", uri="sip:2300@Asterix", response="9c3f59f925a7feb47e0631735d103c88", algorithm=MD5 Max-Forwards: 70 User-Agent: iS3000 SIP Server, Philips Business Communications Content-Length: 0 -- Skype: MartinvdbBerg