<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:14pt"><div id="yiv6622786025yui_3_13_0_7_1398415973063_13" class="" style="font-size: 14pt"><span id="yiv6622786025yui_3_13_0_7_1398415973063_27" class="" style="">Hi folks,</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_15" class="" style="font-size: 14pt"></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"> </div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt">I am using Kamailio with IMS, I added the configuration of the WebSocket to the kamailio.cfg  in the PCSCF to enable WebRTC clients like (JsSIP) to communicate with each other.. The registration works so far, however when I try to make peer-2-peer call between alice and bob, the caller gets a "403 error" <span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_35"
 style="font-size: 14pt">"403 Forbidden Mohammed- Dialog not found on S-CSCF or Terminating user not suitable for unregistered services" from the S-CSCF.. </span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" style="font-size: 14pt">I did trace on the PCSCF and I found a strange signaling behaviour.</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_36" style="font-size: 14pt">the invite is negotiated between the IMS components as follows:</span></div><div
 id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_39" style="font-size: 14pt">INVITE from   </span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12253" style="font-size: 14pt">PCSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt">  to </span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12257" style="font-size: 14pt">SCSCF</span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12258" style="font-size: 14pt">  </span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_48" style="font-size: 14pt">INVITE
 from   P</span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12270" style="font-size: 14pt">CSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt">  to </span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_59" style="font-size: 14pt">PCSCF</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="">PCSCF responses itself with "403 Forbidden - You must register first with a S-CSCF"<br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12257" style="font-size: 14pt">SCSCF</span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12258" style="font-size: 14pt"> sends the response "403 Forbidden Mohammed- Dialog not found on S-CSCF or Terminating user not suitable for unregistered services"  to
 the </span><span class="" style="font-size: 14pt">PCSCF</span><br class="" style=""></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="">The private IP address of the <span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12253" style="font-size: 14pt">PCSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt"> is </span><span class="" style="color: rgb(34, 34, 34); font-family: Consolas, 'Lucida Console', monospace; white-space: pre-wrap; font-size: 18px; font-weight: bold">172.19.6.35 and of the </span><span class="" style="font-size: 14pt">SCSCF is </span><span class="" style="color: rgb(34, 34, 34); font-family: Consolas, 'Lucida Console', monospace; font-size: 18px; font-weight: bold; white-space:
 pre-wrap">172.19.6.36. The </span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12253" style="font-size: 14pt">PCSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt">  has a public IP "193.175.132.235"</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt">The IMS components don't run on the same machine, </span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12253" style="font-size: 14pt">PCSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt"> and </span><span class="" style="font-size: 14pt">SCSCF</span><span class="" style="font-size: 14pt"> are listening to the port 5060. the WebSocket port of the
  </span><span class="" id="yiv6622786025yui_3_13_0_1_1398415973063_12253" style="font-size: 14pt">PCSCF</span><span class="" id="yiv6622786025yui_3_13_0_7_1398415973063_43" style="font-size: 14pt">  is 8000</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt">Can anyone help me get a solution for this problem</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt"><br class="" style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt">Thanks in advance</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt"><br class=""
 style=""></span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style=""><span class="" style="font-size: 14pt">Best regards,</span></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_17" class="" style="font-size: 14pt"><br class="" style=""></div><div id="yiv6622786025yui_3_13_0_7_1398415973063_19" class="" style="font-size: 14pt; color: rgb(17, 17, 17); font-weight: bold"><font size="3" id="yiv6622786025yui_3_13_0_1_1398415973063_12136" class="" style="">Medo</font></div></div></body></html>