<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
RAS-aware firewall?<div><br></div><div>This is expected because CUCM uses 1720 for direct H.225 communication (and refuses connections on this port from unknown devices). When we register with the gatekeeper we use a random port and this is what the gatekeeper tells other devices to send calls to CUCM on. When CUCM sees an inbound connection on that port it knows to treat the call as coming from the gk-controlled trunk.</div><div><br><div> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">-Ryan</font></p> </div><br><div><div>On Jan 16, 2009, at 9:37 AM, Philip Walenta wrote:</div><br class="Apple-interchange-newline"> <div><span class="711253314-16012009"><font face="Arial" size="2">Greetings list,</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">Scenario:</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">I have a CUCM 6.1 system firewalled from the world. I need to establish a gatekeeper controlled trunk.</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">However, upon any reset of the trunk the ports numbers change.</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">Has anyone run into this, and if so, how have you dealt with it?</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">Thanks,</font></span></div> <div><span class="711253314-16012009"><font face="Arial" size="2"></font></span> </div> <div><span class="711253314-16012009"><font face="Arial" size="2">Phil</font></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">cisco-voip mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</a></div> </div><br></div></body></html>