<p></p>
<p>The BYE should not have R-URI pointing to local Kamailio (D.D.D.D) if you got that BYE content from the Kamailio. If you got it with ngrep from the network, then it should be no Route headers pointing to local Kamailio (D.D.D.D).</p>
<p>This does not look as a topos C code issue, it can be some misconfiguration or broken systems that interact with kamailio.</p>
<p>To sort out what it is, write to <a href="mailto:sr-users@lists.kamailio.org">sr-users@lists.kamailio.org</a> providing the ngrep output for such call taken on kamailio with topos, using:</p>
<pre><code>ngrep -d any -qt -W byline port 5060
</code></pre>
<p>Then we can discuss there what might be the causes and if it is a bug in the C code, a corresponding issue can be created here.</p>

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