<p>when using the below script blocks for handling SUBSCRIBE messages, the nat_keepalive does not work as expected.</p>
<pre><code>#!ifdef NAT_TRAVERSAL_ROLE
route[PRESENCE_NAT]
{   
    force_rport();
    if (client_nat_test("3")) {
        if(is_first_hop())
           set_contact_alias();
        nat_keepalive();
    }
}
#!endif

route[HANDLE_SUBSCRIBE]
{
    if (!is_method("SUBSCRIBE")) {
        return;
    }

    #!ifdef NAT_TRAVERSAL_ROLE
      route(PRESENCE_NAT);
    #!endif

    if (!t_newtran()) {
        sl_reply_error();
        exit;
    }
    
    if(has_totag()) {
        route(HANDLE_RESUBSCRIBE);
    } else {
        route(HANDLE_NEW_SUBSCRIBE);
    }
    t_release();    
    exit;
}
</code></pre>
<p>i believe this should be backported to stable branches<br>
Thanks</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/1344'>https://github.com/kamailio/kamailio/pull/1344</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>nat_traversal: fix local generated transactions</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/1344/files#diff-0">src/modules/nat_traversal/nat_traversal.c</a>
    (29)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/1344.patch'>https://github.com/kamailio/kamailio/pull/1344.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/1344.diff'>https://github.com/kamailio/kamailio/pull/1344.diff</a></li>
</ul>

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