<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
<title>Re: [Freeswitch-users] SIP Trace Question / NAT one way audio problem.</title>
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Verdana","sans-serif";
color:#44546A;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A">Just a follow up with the confirmed resolution.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A">I had copied the FS Directory entries for these Polycom Phones from a CISCO phone setup. That setup specified:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue"> <</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">param</span><span style="font-size:9.5pt;font-family:Consolas;color:blue">
</span><span style="font-size:9.5pt;font-family:Consolas;color:red">name</span><span style="font-size:9.5pt;font-family:Consolas;color:blue">=</span><span style="font-size:9.5pt;font-family:Consolas">"<span style="color:blue">NDLB-force-rport</span>"<span style="color:blue">
</span><span style="color:red">value</span><span style="color:blue">=</span>"<span style="color:blue">true</span>"<span style="color:blue">/></span><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A">Ken adviced to change that for Polycom Phones to:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue"> <</span><span style="font-size:9.5pt;font-family:Consolas;color:#A31515">param</span><span style="font-size:9.5pt;font-family:Consolas;color:blue">
</span><span style="font-size:9.5pt;font-family:Consolas;color:red">name</span><span style="font-size:9.5pt;font-family:Consolas;color:blue">=</span><span style="font-size:9.5pt;font-family:Consolas">"<span style="color:blue">NDLB-force-rport</span>"<span style="color:blue">
</span><span style="color:red">value</span><span style="color:blue">=</span>"<b><span style="color:blue">safe</span></b>"<span style="color:blue">/></span><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A">The customer emailed me today to say the problem has been resolved. Thanks for all who sent their thoughts. Extra thanks to Ken.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A">Sean<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#44546A"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org]
<b>On Behalf Of </b>Ken Rice<br>
<b>Sent:</b> Thursday, December 05, 2013 9:48 PM<br>
<b>To:</b> FreeSWITCH Users Help<br>
<b>Subject:</b> Re: [Freeswitch-users] SIP Trace Question / NAT one way audio problem.<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt;font-family:"Courier New"">Re-registering every 23 seconds isnt that big of a deal if the phones are behind nat, sometimes this is needed due to the way NAT happens on UDP with
various routers. There is no way to track the start/end of the session w/out using an ALG. I have seen some NAT routers require a re-reg interval around 15 seconds which is a bit excessing<br>
<br>
On the issue w/ the non-working ones is you’ll notice the rport on the one that’s working...<br>
<br>
On the ones that arent working they arent specifying rport... If those are the polycoms look for NDLB force rport setting and set it to safe... That’s a special mode for the polycoms...<br>
<br>
Check the wiki for more NAT handling examples<br>
K<br>
<br>
<br>
On 12/5/13 8:36 PM, "Sean P Devoy" <<a href="sdevoy@bizfocused.com">sdevoy@bizfocused.com</a>> wrote:</span><o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt;font-family:"Courier New""><img border="0" width="31" height="31" id="_x0000_i1025" src="cid:image001.gif@01CEFD76.90387370"><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">Hi all,<br>
<br>
I seem to have fallen off the list! No mail since 7/26/2013. Have I made someone mad?? </span><span style="font-family:Wingdings;color:#44546A">J<br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A"><br>
I have also been blissfully running with ISSUES what so ever since that time.<br>
<br>
I have a NATed client with <b>PERIODIC</b> one way audio. The client end has a Cisco 220W router with SIP ALG disabled. The phones are CISCO 504Gs and Polycom 330s(?), basciallt the same as everywhere else we have phones.<br>
<br>
I did a sofia global sip trace on for a while and captured the output. After writing an app to sort those sip packets into logical stream files, I dug in to the SIP conversations. This has left me with som questions for the people who know these things:<br>
<br>
1. I found all my phones are REGISTERing every 23 seconds! That seems absurd TO ME, so where have I screwed that up/where do I set it and what is a reasonable number?<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">2. The only difference I see in the SIP packets from my working phone and these non-working ones is of course NAT related. The working phone’s REGISTER looks like this:<br>
<br>
recv 757 bytes from udp/[WW.XX.YY.93]:5063 at 17:53:12.164203:<br>
------------------------------------------------------------------------ <br>
REGISTER sip: <MYDOMAIN.COM> SIP/2.0<br>
Via: SIP/2.0/UDP WW.XX.YY.93:5063;branch=z9hG4bK-238fcc8b;rport<br>
<br>
But the failing phones look like this:<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A"><br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">recv 801 bytes from udp/[AA.BB.CC.38]:5104 at 17:53:40.693691:<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">------------------------------------------------------------------------<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">REGISTER sip: <MYDOMAIN.COM> SIP/2.0<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">Via: SIP/2.0/UDP 10.2.2.239:5104;branch=z9hG4bKb374d6507894B431<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A"><br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A">The response is still sent to [AA.BB.CC.38]:5104<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><br>
</span><span style="font-family:"Verdana","sans-serif";color:#44546A"><br>
I guess first, IS THAT A PROBLEM?<br>
<br>
So, can anyone share any insight into the CISCO 220W config that I might be missing? <br>
<br>
Why would it only be a periodic problem? Could this be a problem where one end is using a wider range of rports than the other supports?<br>
<br>
Thanks,<br>
Sean<br>
<br>
<br>
</span><span style="font-size:11.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:11.0pt;font-family:"Courier New"">
<hr size="3" width="100%" align="center">
</span></div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:11.0pt;font-family:"Courier New""><<a href="http://www.avast.com/">http://www.avast.com/</a>>
</span><span style="font-family:"Calibri","sans-serif";color:#3D4D5A">This email is free from viruses and malware because avast! Antivirus <<a href="http://www.avast.com/">http://www.avast.com/</a>> protection is active.
</span><span style="font-size:11.0pt;font-family:"Courier New""><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:11.0pt;font-family:"Courier New"">
<hr size="3" width="95%" align="center">
</span></div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">_________________________________________________________________________<br>
Professional FreeSWITCH Consulting Services:<br>
<a href="consulting@freeswitch.org">consulting@freeswitch.org</a><br>
<a href="http://www.freeswitchsolutions.com">http://www.freeswitchsolutions.com</a><br>
<br>
FreeSWITCH-powered IP PBX: The CudaTel Communication Server<br>
<a href="http://www.cudatel.com">http://www.cudatel.com</a><br>
<br>
Official FreeSWITCH Sites<br>
<a href="http://www.freeswitch.org">http://www.freeswitch.org</a><br>
<a href="http://wiki.freeswitch.org">http://wiki.freeswitch.org</a><br>
<a href="http://www.cluecon.com">http://www.cluecon.com</a><br>
<br>
FreeSWITCH-users mailing list<br>
<a href="FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a><br>
<a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>
UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
<a href="http://www.freeswitch.org">http://www.freeswitch.org</a></span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><br>
</span><span style="font-size:11.0pt;font-family:"Courier New"">-- <br>
Ken<br>
<a href="http://www.FreeSWITCH.org">http://www.FreeSWITCH.org</a><br>
<a href="http://www.ClueCon.com">http://www.ClueCon.com</a><br>
<a href="http://www.OSTAG.org">http://www.OSTAG.org</a><br>
G+ ClueCon : <a href="http://fs0.us/cluecon-gplus">http://fs0.us/cluecon-gplus</a><br>
FB ClueCon : <a href="http://fs0.us/cluecon-fb">http://fs0.us/cluecon-fb</a><br>
G+ FreeSwitch : <a href="http://fs0.us/freeswitch-gplus">http://fs0.us/freeswitch-gplus</a><br>
FB FreeSWITCH : <a href="http://fs0.us/freeswitch-fb">http://fs0.us/freeswitch-fb</a>
<br>
Twitter : @FreeSWITCH_WIRE<br>
irc.freenode.net #freeswitch</span><o:p></o:p></p>
</div>
</body>
</html>