Port Reference - Cisco TelePresence Administrator's Manual

Port reference

The VCS uses different IP ports and protocols for different services and functions, and many of these are
configurable. The table below lists each of these services and functions. For each, it shows the default
port(s) and protocol used and whether these ports are used for inbound or outbound communications. If the
ports are configurable it shows the available range and how to configure them using the web interface or CLI.
The information in the table below shows all possible services and the generic defaults for each. The actual
services and ports used on your system will vary depending on its configuration, the option keys installed and
features that have been enabled. A specific list of all the IP ports in use on a particular VCS can be viewed
via the port usage pages.
Note: two services or functions cannot share the same port and protocol; if you attempt to change an existing
port or range and it conflicts with another service, an alarm will be raised.
Service/
function
SSH
Telnet
HTTP
NTP
SNMP
TMS Agent (legacy
mode)
HTTPS
Reserved for future use
Cisco VCS Administrator Guide (X7.1)
Description
Used for encrypted
command line
administration.
Used for unencrypted
command line
administration.
Used for unencrypted web
administration.
Used for updating the
system time (and important
for H.235 security).
Used for network
management.
Used for diagnostics.
Used for encrypted web
administration. Also used
to replicate FindMe data if
the VCS is part of a cluster
with FindMe enabled and
is using the legacy
TMS Agent database.
Default Direction Available
range
22 TCP inbound not
configurable
23 TCP inbound not
configurable
80 TCP inbound not
configurable
123 UDP outbound not
configurable
161 UDP inbound not
configurable
389 TCP inbound not
configurable
443 TCP inbound not
configurable
636 inbound not
configurable
Reference material
Configurable via
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