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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Thank you for your reply.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>ACK is now sent correctly to public IP , yet I have another issue with RBT where it’s still sent to private IP .Yet the call media is sent correctly to the public IP.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>There is something strange , as I hear two short different ringing tones then complete silence till the called party answer the call and RTP flow normally.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>How can I handle this case?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Ali<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Konstantin Polyakov <piligrim_pk@mail.ru> <br><b>Sent:</b> Friday, July 20, 2018 3:01 PM<br><b>To:</b> sr-users@lists.kamailio.org; Ali Taher <ataher@vanrise.com><br><b>Subject:</b> Re: [SR-Users] NATHELPER issue<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hello Ali,<br><br>ACK is sent by UAC to the Contact which is received in OK from UAS.<br>So from my point of view you need to fix that Contact in OK on your proxy.<br><br>My NATDETECT looks like:<o:p></o:p></p><div><p class=MsoNormal> if (nat_uac_test("19")) {<o:p></o:p></p></div><div><p class=MsoNormal> fix_nated_contact();<o:p></o:p></p></div><div><p class=MsoNormal> }<o:p></o:p></p></div><div><p class=MsoNormal><br>I call it for requests and responses.<br><br>Best regards.<br>Konstantin<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><blockquote style='border:none;border-left:solid #0857A6 1.0pt;padding:0in 0in 0in 8.0pt;margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-bottom:7.5pt'><div id=""><div><div><div id="style_15320810450000000770_BODY"><p class=MsoNormal style='margin-bottom:12.0pt'>Message: 23<br>Date: Fri, 20 Jul 2018 11:13:42 +0300<br>From: "Ali Taher" <<a href="mailto:ataher@vanrise.com">ataher@vanrise.com</a>><br>To: <<a href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>><br>Subject: [SR-Users] NATHELPER issue<br>Message-ID: <<a href="mailto:070901d42001$939be2b0$bad3a810$@vanrise.com">070901d42001$939be2b0$bad3a810$@vanrise.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>Hello,<br><br> <br><br>I'm using Kamailio 4.2 as proxy with nathelper enabled.<br><br> <br><br>Yet , the ACK packet sent from the proxy to the origination's private IP.<br><br> <br><br>The ACK is sent as reply on the following 200 OK sent from the origination :<br><br><br> <br><br>8m2EJN41BN/6WSIP/2.0 200 OK<br><br>From: <<a href="sip:+4444331234567@X.X.X.X;user=phone">sip:+4444331234567@X.X.X.X;user=phone</a>>;tag=XQBQNjvjgp4Ze<br><br>To: <<a href="sip:+905362695933@172.16.45.65;user=phone">sip:+905362695933@172.16.45.65;user=phone</a>>;tag=12033368836000<br><br>Via: SIP/2.0/UDP<br>X.X.X.X:5065;branch=z9hG4bK2959.233ecbc5eff949f946d8763ce25e5e6d.0;received=<br>X.X.X.X,SIP/2.0/UDP<br>X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKN93cXvv26vDDN<br><br>Record-Route: <<a href="sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze">sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze</a>><br><br>Call-ID: <a href="mailto:CbeX8453909200habfGhEfElPce@BC00.XXXXXXXXXXXXXX">CbeX8453909200habfGhEfElPce@BC00.XXXXXXXXXXXXXX</a><br><br>CSeq: 125698370 INVITE<br><br>Accept: application/sdp<br><br>Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,UPDATE<br><br>P-Charging-Vector:<br>icid-value=B0912C3D70-0720-09394507;icid-generated-at=BC00.XXXXXXXXXXXXXX.XX<br>;orig-ioi=MXXXXXXXXXXXXXX<br><br>Content-Type: application/sdp<br><br>Contact: <<a href="sip:172.16.45.65:5060;transport=UDP">sip:172.16.45.65:5060;transport=UDP</a>><br><br>Content-Length: 268<br><br> <br><br>v=0<br><br>o=- 5838243 5838244 IN IP4 BC00.XXXXXXXXXXXXXX<br><br>s=-<br><br>c=IN IP4 172.16.45.144<br><br>t=0 0<br><br>a=sendrecv<br><br>m=audio 47588 RTP/AVP 18 96<br><br>c=IN IP4 172.16.45.144<br><br>a=rtpmap:18 G729/8000<br><br>a=fmtp:18 annexb=yes<br><br>a=rtpmap:96 telephone-event/8000<br><br>a=fmtp:96 0-15<br><br>a=maxptime:20<br><br> <br><br>Following is the header of the sent ACK packet:<br><br> <br><br>Request-Line: ACK <a href="sip:172.16.45.65:5060;transport=UDP">sip:172.16.45.65:5060;transport=UDP</a> SIP/2.0<br><br>Record-Route: <<a href="sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze">sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze</a>><br><br>Via: SIP/2.0/UDP<br>X.X.X.X:5065;branch=z9hG4bK2959.871535fd341bbe3099d0bf60d6460e18.0<br><br>Via: SIP/2.0/UDP<br>X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKQUpy0jy90etjc<br><br>Max-Forwards: 69<br><br>From: <<a href="sip:+4444331234567@X.X.X.X;user=phone">sip:+4444331234567@X.X.X.X;user=phone</a>>;tag=XQBQNjvjgp4Ze<br><br>To: <<a href="sip:+905362695933@172.16.45.65;user=phone">sip:+905362695933@172.16.45.65;user=phone</a>>;tag=12033368836000<br><br>Call-ID: <a href="mailto:CbeX8453909200habfGhEfElPce@BC00.XXXXXXXXXXXXXX">CbeX8453909200habfGhEfElPce@BC00.XXXXXXXXXXXXXX</a><br><br>CSeq: 125698370 ACK<br><br>Content-Length: 0<br><br> <br><br>Where X.X.X.X is Kamailio server public IP.<br><br> <br><br>Following is part of my config file :<br><br> <br><br>route {<br><br>route(NATDETECT);<br><br>record_route();<br><br> <br><br> if(!mf_process_maxfwd_header("10")) {<br><br> sl_send_reply("483", "Too Many Hops");<br><br> exit;<br><br> }<br><br> <br><br> # Maybe some sanity_check() here.<br><br> <br><br> if(has_totag()) {<br><br> <br><br> if(loose_route()) {<br><br> route(DLGURI);<br><br> if(!t_relay())<br><br> sl_reply_error();<br><br> <br><br> exit;<br><br> } else {<br><br> if(is_method("ACK")) {<br><br> route(DLGURI);<br><br> if(t_check_trans()) {<br><br> t_relay();<br><br> }<br><br> } else<br><br> sl_send_reply("403", "Forbidden");<br><br> }<br><br> exit;<br><br> }<br><br> <br><br>.....<br><br>}<br><br> <br><br> <br><br>route[NATDETECT] {<br><br>#!ifdef WITH_NAT<br><br> force_rport();<br><br> if (nat_uac_test("19")) {<br><br> if (is_method("REGISTER")) {<br><br> fix_nated_register();<br><br> } else {<br><br> add_contact_alias();<br><br> }<br><br> setflag(FLT_NATS);<br><br> }<br><br>#!endif<br><br> return;<br><br>}<br><br> <br><br>route[DLGURI] {<br><br>#!ifdef WITH_NAT<br><br> if(!isdsturiset()) {<br><br> handle_ruri_alias();<br><br> }<br><br>#!endif<br><br> return;<br><br>} <br><br> <br><br>Can you please check why the ACK is still sent on private IP ?<br><br> <br><br>Thanks<br><br>Ali Taher<br><br><o:p></o:p></p></div></div></div></div></blockquote><p class=MsoNormal><o:p> </o:p></p><div id="_mcePaste"><p class=MsoNormal>"Ali Taher" <<a href="https://e.mail.ru/compose?To=ataher@vanrise.com">ataher@vanrise.com</a>><o:p></o:p></p></div></div></body></html>