<p>Sure attached.</p>

<p>packet 7 is the initial INVITE, this has Cseq of 17027</p>

<p>then there is a 401, using dialog module this increments the Cseq as expected to 17028 on packet 12 and the call proceeds.</p>

<p>There is 100rel required in the 183 with SDP as expected which has RSeq: 981875949 (packet 14)</p>

<p>The PRACK for this 183 is sent in packet 17 with RAck: 981875949 17027 INVITE</p>

<p>The Cseq inthe RAck header has not incremented and remains the same as the initial INVITE before authentication.</p>

<p>Many thanks<br>
<a href="https://github.com/kamailio/kamailio/files/500149/trace-rack.zip">trace-rack.zip</a></p>

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