If firewalld is available, just try with 'firewall-cmd --panic-on' (or something like that).<div id="yMail_cursorElementTracker_1616173236669"><br></div><div id="yMail_cursorElementTracker_1616173236903">Best Regards,</div><div id="yMail_cursorElementTracker_1616173241250">Strahil Nikolov<br> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Fri, Mar 19, 2021 at 12:50, Marcelo Terres</div><div><mhterres@gmail.com> wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> _______________________________________________<br clear="none">Manage your subscription:<br clear="none"><a shape="rect" href="https://lists.clusterlabs.org/mailman/listinfo/users" target="_blank">https://lists.clusterlabs.org/mailman/listinfo/users</a><br clear="none"><br clear="none">ClusterLabs home: <a shape="rect" href="https://www.clusterlabs.org/" target="_blank">https://www.clusterlabs.org/</a><br clear="none"> </div> </blockquote></div>