Cisco Cisco TelePresence Video Communication Server Expressway 릴리즈 노트
Port reference
Cisco TelePresence Video Communication Server X8.1 Software Release Notes
Page 17 of 25
Port reference
The following tables list the IP ports and protocols used by VCS for general services and functions.
For more information about ports, including those used for Unified Communications, device authentication,
and the Microsoft Lync B2BUA see
and the Microsoft Lync B2BUA see
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 (
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 usage
).
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.
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.
systems.
Service/
function
function
Purpose
VCS port (default)
Direction Configurable via
SSH
Encrypted command line administration.
22 TCP
inbound
not configurable
HTTP
Unencrypted web administration.
80 TCP
inbound
not configurable
NTP
System time updates (and important for
H.235 security).
H.235 security).
123 UDP
outbound not configurable
SNMP
Network management.
161 UDP
inbound
not configurable
HTTPS
Encrypted web administration.
443 TCP
inbound
not configurable
Clustering
IPsec secure communication between
cluster peers.
cluster peers.
500 UDP
inbound
outbound
outbound
not configurable
Clustering
IPsec secure communication between
cluster peers.
cluster peers.
IP protocol 51
(IPSec AH)
(IPSec AH)
inbound
outbound
outbound
not configurable
Reserved
636
inbound
not configurable
DNS
Sending requests to DNS servers.
1024 - 65535 UDP
outbound
System > DNS
Gatekeeper
discovery
discovery
Multicast gatekeeper discovery. The VCS
does not listen on this port when H.323
Gatekeeper Auto discover mode is set to
Off (this disables IGMP messages).
does not listen on this port when H.323
Gatekeeper Auto discover mode is set to
Off (this disables IGMP messages).
1718 UDP
inbound
not configurable
H.323
registration
Clustering
registration
Clustering
Listens for inbound H.323 UDP
registrations. If the VCS is part of a cluster,
this port is used for inbound and outbound
communication with peers, even if H.323
is disabled.
registrations. If the VCS is part of a cluster,
this port is used for inbound and outbound
communication with peers, even if H.323
is disabled.
1719 UDP
inbound
outbound
outbound
Configuration >
Protocols > H.323
Protocols > H.323
H.323 call
signaling
signaling
Listens for H.323 call signaling.
1720 TCP
inbound
Configuration >
Protocols > H.323
Protocols > H.323
Table 4: Local inbound/outbound ports