Remote Listening Ports - Cisco TelePresence Administrator's Manual

Maintenance
outbound traffic out from the IP port on the VCS to the destination of the outbound communications, and
n
return traffic from that destination back to the same VCS IP port.
n
Note: this firewall configuration is particularly important if this VCS is a traversal client or traversal server, in
order for Expressway firewall traversal to function correctly.

Remote listening ports

The Remote listening ports
shows the destination IP addresses and IP ports of remote systems with which the VCS communicates.
Your firewall must be configured to allow traffic originating from the local VCS to the remote devices
identified by the IP addresses and IP ports listed on this page.
Note: there are other remote devices not listed here to which the VCS will be sending media and signaling,
but the ports on which these devices receive traffic from the VCS is determined by the configuration of the
destination device, so they cannot be listed here. If you have opened all the ports listed in the
ports page, the VCS will be able to communicate with all remote devices. You only need to use the
information on this page if you want to limit the IP ports opened on your firewall to these remote systems and
ports.
Cisco VCS Administrator Guide (X8.1.1)
page (Maintenance > Tools > Port usage > Remote listening
Port usage
ports)
Local outbound
Page 312 of 507