<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:14pt"><div id="yiv9059339459"><div><div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 14pt; background-color: rgb(255, 255, 255);"><div class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398507029661_9015" style=""><div id="yiv9059339459" class="yiv9059339459" style=""><div id="yiv9059339459yui_3_13_0_1_1398507029661_9017" class="yiv9059339459" style=""><div id="yiv9059339459yui_3_13_0_1_1398507029661_9016" style="font-size:14pt;" class="yiv9059339459"><div id="yiv9059339459yui_3_13_0_7_1398415973063_13" class="yiv9059339459" style="font-size:14pt;"><span id="yiv9059339459yui_3_13_0_7_1398415973063_27" class="yiv9059339459" style="">Hi folks,</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_15" class="yiv9059339459" style="font-size:14pt;"></div><div
id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"> </div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" 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="yiv9059339459" id="yiv9059339459yui_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="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12863">I did trace on the PCSCF and I found a strange signaling behaviour.</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459"
style="font-size:14pt;"><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_36" style="font-size:14pt;">the invite is negotiated between the IMS components as follows:</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_39" style="font-size:14pt;">INVITE from </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12253" style="font-size:14pt;">PCSCF</span><span
class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> to </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12257" style="font-size:14pt;">SCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12258" style="font-size:14pt;"> </span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_48" style="font-size:14pt;">INVITE from P</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12270" style="font-size:14pt;">CSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> to </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_59" style="font-size:14pt;">PCSCF</span></div><div
id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398507029661_9030" style="">PCSCF responses itself with "403 Forbidden - You must register first with a S-CSCF"<br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12257" style="font-size:14pt;">SCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_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="yiv9059339459" style="font-size:14pt;">PCSCF</span><br class="yiv9059339459" style=""></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span
class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="">The private IP address of the <span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12253" style="font-size:14pt;">PCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> is </span><span class="yiv9059339459" style="color: rgb(34, 34, 34); font-family: Consolas, 'Lucida Console', monospace; white-space: pre-wrap; font-size: 18px; font-weight: bold;" id="yiv9059339459yui_3_13_0_1_1398507029661_12484">172.19.6.35 and of the </span><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12487">SCSCF is </span><span class="yiv9059339459" style="color: rgb(34, 34, 34); font-family: Consolas, 'Lucida Console', monospace; font-size: 18px; font-weight:
bold; white-space: pre-wrap;" id="yiv9059339459yui_3_13_0_1_1398507029661_12553">172.19.6.36. The </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12253" style="font-size:14pt;">PCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> has a public IP "193.175.132.235"</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12208">The IMS components don't run on the same machine, </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12253" style="font-size:14pt;">PCSCF</span><span class="yiv9059339459"
id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> and </span><span class="yiv9059339459" style="font-size:14pt;">SCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398507029661_9034" style="font-size:14pt;"> are listening to the port 5060. the WebSocket port of the </span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_1_1398415973063_12253" style="font-size:14pt;">PCSCF</span><span class="yiv9059339459" id="yiv9059339459yui_3_13_0_7_1398415973063_43" style="font-size:14pt;"> is 8000</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12209">Can anyone help
me get a solution for this problem</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12210">Thanks in advance </span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;"><br class="yiv9059339459" style=""></span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style=""><span class="yiv9059339459" style="font-size:14pt;" id="yiv9059339459yui_3_13_0_1_1398507029661_12211">Best regards,</span></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_17" class="yiv9059339459" style="font-size:14pt;"><br
class="yiv9059339459" style=""></div><div id="yiv9059339459yui_3_13_0_7_1398415973063_19" class="yiv9059339459" style="
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