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<tt>Hello Igor,<br>
<br>
Right now OpenSIPs does not support increasing the cseq during UAC
authentication. At the end this is a limitation of the a proxy
versus a B2B :)<br>
<br>
Best regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a>
</pre>
<div class="moz-cite-prefix">On 09/25/2017 04:00 PM, Igor Olhovskiy
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f47265df-fca8-4674-b14d-764db6e0d9bf@Spark">
<title></title>
<div name="messageBodySection" style="font-size: 14px;
font-family: -apple-system, BlinkMacSystemFont, sans-serif;">Hi!
<div><br>
</div>
<div>I’m trying to implement scenario, when OpenSIPS would be a
proxy for IP auth SIP side and username/pass auth other side.</div>
<div>So, call scenario would be like</div>
<div><br>
</div>
<div>1. A -> INVITE -> OpenSIPS
B</div>
<div>2. A OpenSIPS -> INVITE
-> B</div>
<div>3. A OpenSIPS <- 401
<- B</div>
<div>4. A OpenSIPS -> INVITE (auth)
-> B</div>
<div>5. A OpenSIPS <- 200
<- B</div>
<div>6. A <- 200 <- OpenSIPS</div>
<div><br>
</div>
<div>But the problem is in CSeq. On step 4, when sending INVITE
with Auth CSeq should be changed from original (usually
incremented), but on step 6, when replying back to A, it
should be original.</div>
<div><br>
</div>
<div>I didn’t found better solution, than to manually manipulate
with CSeq with append/remove headers.</div>
<div>So, maybe there is more OpenSIPS - wise way of doing this?</div>
</div>
<div name="messageSignatureSection" style="font-size: 14px;
font-family: -apple-system, BlinkMacSystemFont, sans-serif;"><br>
Regards, Igor</div>
<br>
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</pre>
</blockquote>
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