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Hello,<br>
<br>
On 8/10/10 12:37 PM, Mahesh Paolini-Subramanya wrote:
<blockquote
cite="mid:6746E5A8-F83C-409D-BA43-AE0E1733C964@aptela.com"
type="cite"><base href="x-msg://292/">
<div>I'm seeing some *very* puzzling behavior from a bunch of our
clients. Basically, the INVITE never makes it to the fone, it
looks like the upstream router/modem just swallows it. The
weird thing is, tweaking the username slightly resolves the
issue, for a while at least. And then, it stops again. Anyone
seen anything like this before? Any ideas? Am I missing
something ridiculously obvious?</div>
<div>Fwiw, I've seen this behavior in setups with *no* SIP ALG,
and *no* firewall. That said, it really *does* look like a
firewalling issue, doesnt it?</div>
</blockquote>
<br>
if the request is sent by kamailio but not reaching the phone, then
is something in the middle inspecting SIP and discarding (big
brother?). Is it a particular type of phone, or any phone? At first
sight, the request seems just fine. I cannot think of something else
than alg/firewall in the middle, unless the phone itself discards
it.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<blockquote
cite="mid:6746E5A8-F83C-409D-BA43-AE0E1733C964@aptela.com"
type="cite">
<div><br>
</div>
<div>Here is a typical INVITE that is sent out from Kamailio. The
username is <i>mahesh.test204</i>. The "fix" is to simply
change the name to "mahesh.test205", or "mahesh.test20", or
"ahesh.test204", etc. </div>
<div>Is there something obviously wrong with the INVITE perhaps?
Bad format?</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>INVITE <a moz-do-not-send="true"
href="sip:mahesh.test204@173.101.106.53:5060;rinstance=e2f54e94d29118d7;transport=UDP">sip:mahesh.test204@173.101.106.53:5060;rinstance=e2f54e94d29118d7;transport=UDP</a>
SIP/2.0.</div>
<div>Record-Route: <<a moz-do-not-send="true"
href="sip:74.217.82.147;lr;ftag=X8BN4N8vtXKej;nat=yes">sip:74.217.82.147;lr;ftag=X8BN4N8vtXKej;nat=yes</a>>.</div>
<div>Via: SIP/2.0/UDP
74.217.82.147;branch=z9hG4bK8e0c.0ded64d5.0.</div>
<div>Via: SIP/2.0/UDP
74.217.82.232;received=74.217.82.232;rport=5060;branch=z9hG4bK3DtFg45Qetv9F.</div>
<div>Max-Forwards: 69.</div>
<div>From: "7732206484" <<a moz-do-not-send="true"
href="sip:2065771035@74.217.82.232">sip:2065771035@74.217.82.232</a>>;tag=X8BN4N8vtXKej.</div>
<div>To: <<a moz-do-not-send="true"
href="sip:mahesh.test204@a5prodsbc.aptela.com">sip:mahesh.test204@a5prodsbc.aptela.com</a>>.</div>
<div>Call-ID: 67108c50-1f0d-122e-17b1-001a647938bc.</div>
<div>CSeq: 382107 INVITE.</div>
<div>Contact: <<a moz-do-not-send="true"
href="sip:mod_sofia@74.217.82.232:5060">sip:mod_sofia@74.217.82.232:5060</a>>.</div>
<div>Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE,
INFO, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE.</div>
<div>Supported: precondition, path, replaces.</div>
<div>Allow-Events: talk, presence, dialog, line-seize,
call-info, sla, include-session-description, presence.winfo,
message-summary, refer.</div>
<div>Content-Type: application/sdp.</div>
<div>Content-Disposition: session.</div>
<div>Content-Length: 246.</div>
<div>Subject: Local.</div>
<div>Remote-Party-ID: "7732206484" <<a moz-do-not-send="true"
href="sip:2065771035@74.217.82.147">sip:2065771035@74.217.82.147</a>>;party=calling;id-type=subscriber;screen=yes;privacy=off.</div>
<div>.</div>
<div>v=0.</div>
<div>o=FreeSWITCH 1281422601 1281422602 IN IP4 74.217.82.232.</div>
<div>s=FreeSWITCH.</div>
<div>c=IN IP4 74.217.82.232.</div>
<div>t=0 0.</div>
<div>m=audio 13742 RTP/AVP 0 101 13.</div>
<div>a=rtpmap:0 PCMU/8000.</div>
<div>a=rtpmap:101 telephone-event/8000.</div>
<div>a=fmtp:101 0-16.</div>
<div>a=rtpmap:13 CN/8000.</div>
<div>a=ptime:20.</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<br>
<div>
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<pre wrap="">
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://www.asipto.com/">http://www.asipto.com/</a>
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