Hello there, I am Network Administrator working for a company called Hellasfon Network S.A. I use SER 0.9.3 with Vovida’s STUN server. PAP2 UAis NATed and gets registered using my ADSL modem’s IP and everything looks OK. The problem is when I try to make a call to another UA) of my service I get the following output from my server (ngrep):. Please help me if u can!!! U 2005/08/03 13:55:57.380953 XX.XX.XX.XX:5060 -> XX.XX.XX.XX:5060 INVITE sip:2810318308@XXXXXXXXXX.com SIP/2.0. Record-Route: <sip:XX.XX.XX.XX;ftag=7ab32f2bbf2689feo0;lr=on>. Via: SIP/2.0/UDP XX.XX.XX.XX;branch=z9hG4bK9925.01a26607.0. Via: SIP/2.0/UDP XX.XX.XX.XX:5060;branch=z9hG4bK-ae62fa6a;rport=5060. From: <sip:2810300308@XXXXXXXXXX.com>;tag=7ab32f2bbf2689feo0. To: <sip:2810318308@XXXXXXXXXX.com>. Call-ID: b521746f-5119658a(a)192.168.1.2. CSeq: 102 INVITE. Max-Forwards: 16. Contact: <sip:2810300308@XX.XX.XX.XX:5060>. Expires: 240. User-Agent: Linksys/PAP2-2.0.12(LS). Content-Length: 420. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER. Supported: x-sipura. Content-Type: application/sdp. . v=0. o=- 13486 13486 IN IP4 XX.XX.XX.XX. s=-. c=IN IP4 XX.XX.XX.XX. t=0 0. m=audio 16420 RTP/AVP 18 0 2 4 8 96 97 98 100 101. a=rtpmap:18 G729a/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:96 G726-40/8000. a=rtpmap:97 G726-24/8000. a=rtpmap:98 G726-16/8000. a=rtpmap:100 NSE/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30. a=sendrecv. # U 2005/08/03 13:55:57.381212 XX.XX.XX.XX:5060 -> XX.XX.XX.XX:5060 SIP/2.0 407 Proxy Authentication Required. Via: SIP/2.0/UDP XX.XX.XX.XX;branch=z9hG4bK9925.01a26607.0. Via: SIP/2.0/UDP XX.XX.XX.XX:5060;branch=z9hG4bK-ae62fa6a;rport=5060. From: <sip:2810300308@XXXXXXXXXX.com>;tag=7ab32f2bbf2689feo0. To: <sip:2810318308@XXXXXXXXXX.com>;tag=5f52b14eb2ca58a7910364a1cdbf6fd5.a179. Call-ID: b521746f-5119658a(a)192.168.1.2. CSeq: 102 INVITE. Proxy-Authenticate: Digest realm="XXXXXXXXXX.com", nonce="42f0a3e9ea677d46038bdbeccaf8d95c18bce58e". Server: Sip EXpress router (0.9.3 (i386/linux)). Content-Length: 0. Warning: 392 XX.XX.XX.XX:5060 "Noisy feedback tells: pid=4360 req_src_ip=XX.XX.XX.XX req_src_port=5060 in_uri=sip:2810318308@XXXXXXXXXX.com out_uri=sip:2810318308@XXXXXXXXXX.com via_cnt==2". . # U 2005/08/03 13:55:57.381353 XX.XX.XX.XX:5060 -> XX.XX.XX.XX:5060 ACK sip:2810318308@XXXXXXXXXX.com SIP/2.0. Via: SIP/2.0/UDP XX.XX.XX.XX;branch=z9hG4bK9925.01a26607.0. From: <sip:2810300308@XXXXXXXXXX.com>;tag=7ab32f2bbf2689feo0. Call-ID: b521746f-5119658a(a)192.168.1.2. To: <sip:2810318308@XXXXXXXXXX.com>;tag=5f52b14eb2ca58a7910364a1cdbf6fd5.a179. CSeq: 102 ACK. User-Agent: Sip EXpress router(0.9.3 (i386/linux)). Content-Length: 0. . # U 2005/08/03 13:55:57.664069 XX.XX.XX.XX:5060 -> XX.XX.XX.XX:5060 ACK sip:2810318308@XXXXXXXXXX.com SIP/2.0. Via: SIP/2.0/UDP XX.XX.XX.XX:5060;branch=z9hG4bK-ae62fa6a;rport. From: <sip:2810300308@XXXXXXXXXX.com>;tag=7ab32f2bbf2689feo0. To: <sip:2810318308@XXXXXXXXXX.com>;tag=5f52b14eb2ca58a7910364a1cdbf6fd5.a179. Call-ID: b521746f-5119658a(a)192.168.1.2. CSeq: 102 ACK. Max-Forwards: 70. Proxy-Authorization: Digest username="2810300308",realm="XXXXXXXXXX.com",nonce="42f0a3e8f78926d700140a7c490f06dd965ea748",uri="sip:2810318308@XXXXXXXXXX.com",algorithm=MD5,response="ac73134a0de530d527cfbe4fe1903707". Contact: <sip:2810300308@XX.XX.XX.XX:5060>. User-Agent: Linksys/PAP2-2.0.12(LS). Content-Length: 0. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/