<h3>Description</h3>
<p>If call has ended with BYE after 180/183 before 200 OK, kamailio tries to create new connection to destination, not to use existing.<br>
With firewall enabled and TLS transport this is issue.</p>
<h3>Troubleshooting</h3>
<h4>Reproduction</h4>
<p>Load topos module, register client (asterisk, it shows port 5061 in contact but real query comes from random tcp port) using TLS, make call to it, terminate call with BYE, before answering.</p>
<h4>Log Messages</h4>
<p><a href="https://github.com/kamailio/kamailio/files/1505189/kamailio-topos.gz">kamailio-topos.gz</a></p>
<h4>SIP Traffic</h4>
<p><a href="https://github.com/kamailio/kamailio/files/1505192/topos-by-befor-ack.tar.gz">topos-by-befor-ack.tar.gz</a></p>
<h3>Additional Information</h3>
<p>version: kamailio 5.2.0-dev1 (x86_64/linux)<br>
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES<br>
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB<br>
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.<br>
id: unknown<br>
compiled on 09:24:06 Nov 27 2017 with gcc 4.8.5</p>
<ul>
<li><strong>Operating System</strong>:</li>
</ul>
<p>Red Hat Enterprise Linux Server 7.3</p>
<p>3.10.0-514.el7.x86_64 <a href="https://github.com/kamailio/kamailio/issues/1" class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="31891578" data-permission-text="Issue title is private" data-url="https://github.com/kamailio/kamailio/issues/1">#1</a> SMP Wed Oct 19 11:24:13 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux</p>

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