Port Reference; Local Vcs Inbound/Outbound Ports - Cisco TelePresence Administrator's Manual

Reference material

Port reference

The following tables list the IP ports and protocols used by VCS for general services and functions. Also see:
Microsoft Lync B2BUA port reference [p.397]
n
Device authentication port reference [p.399]
n
Unified Communications port reference [p.395]
n
The tables show the generic defaults for each service, many of which are configurable. 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 (Maintenance > Tools > Port
When Advanced Networking is enabled, all ports configured on the VCS, including those relating to firewall
traversal, apply to both IP addresses; you cannot configure ports separately for each IP address.

Local VCS inbound/outbound ports

These are the IP ports on the VCS used to receive (inbound) or send (outbound) communications with other
systems.
Table 7: Local inbound/outbound ports
Service/ Purpose
function
SSH Encrypted command line administration.
HTTP Unencrypted web administration.
NTP System time updates (and important for
H.235 security).
SNMP Network management.
HTTPS Encrypted web administration.
Clustering IPsec secure communication between
cluster peers.
Clustering IPsec secure communication between
cluster peers.
Reserved
DNS Sending requests to DNS servers.
Gatekeeper Multicast gatekeeper discovery. The VCS
discovery does not listen on this port when H.323
Gatekeeper Auto discover mode is set to
Off (this disables IGMP messages).
H.323 Listens for inbound H.323 UDP
registration registrations. If the VCS is part of a cluster,
Clustering this port is used for inbound and outbound
communication with peers, even if H.323
is disabled.
Cisco VCS Administrator Guide (X8.1.1)
usage).
VCS port (default)
22 TCP
80 TCP
123 UDP
161 UDP
443 TCP
500 UDP
IP protocol 51
(IPSec AH)
636
1024 - 65535 UDP
1718 UDP
1719 UDP
Port reference
Direction Configurable via
inbound not configurable
inbound not configurable
outbound not configurable
inbound not configurable
inbound not configurable
inbound not configurable
outbound
inbound not configurable
outbound
inbound not configurable
outbound System > DNS
inbound not configurable
inbound Configuration >
outbound Protocols > H.323
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