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<p>Hello,<br>
</p>
<br>
<div class="moz-cite-prefix">On 18.07.17 16:00, Colton Conor wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMDdSzPg7Vf-Y3--U+pFPe9nhY8gtZ4om3=x3eFsAmrxq7L+XA@mail.gmail.com">
<div dir="ltr">Anyone have a tool that a technician or customer
could put on a computer on a customer's network, and it will
tell them if a SIP ALG was disabled or enabled? Or if their
network was suitable for SIP traffic?
<div><br>
</div>
<div>We started deploying some Ubiquiti Unifi USG routers, and
discovered that they had SIP ALG enabled by default.</div>
<div><br>
Typically we just put the Polycom VVX phones to register with
TCP for signaling, and this bypasses most SIP ALGs as I think
most can only handle SIP using UDP and not TCP right?</div>
<div><br>
</div>
<div>Well I guess the SIP ALG used in the Ubiquiti Unifi USG
does modify even SIP using TCP. I know Ubiquiti Unifi USG use
a fork of the vyatta operating system, and the command to
disabled it is <span
style="color:rgb(51,51,51);font-size:14px">set system
conntrack modules sip disable</span></div>
<div><br>
</div>
<div>We were able to turn SIP ALG off, and now everything is
working fine.</div>
<div><br>
</div>
<div>Would be great if there was a tool a low level tech or
customer could use to test the network?</div>
<div><br>
</div>
<br>
</div>
</blockquote>
quite a while ago SIP ALG Detector was announced, an oss
client-server pair for detecting SIP ALGs written in ruby:<br>
<br>
-
<a class="moz-txt-link-freetext" href="https://lists.kamailio.org/pipermail/sr-users/2009-June/023630.html">https://lists.kamailio.org/pipermail/sr-users/2009-June/023630.html</a><br>
<br>
But that link was no longer available when I checked earlier today,
so I asked the developer about it and he made it available on
github:<br>
<br>
- <a class="moz-txt-link-freetext" href="https://github.com/ibc/sip-alg-detector">https://github.com/ibc/sip-alg-detector</a><br>
<br>
As noted in its readme, it is not really maintained, but it may
still work or eventually can be something easy to fix for someone
that looks for an OSS SIP ALG detector.<br>
<br>
Cheers,<br>
Daniel<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
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