Cisco Cisco Expressway Release Notes
Port reference
Cisco TelePresence Cisco Expressway Software Release Notes (X8.1.2)
Page 9 of 14
Service/
function
function
Purpose
Expressway port
(default)
(default)
Direction Configurable via
Non-
multiplexed
media port
range
multiplexed
media port
range
Range of ports used for non-
multiplexed media. Ports are allocated
from this range in pairs, with the first
port number of each pair being an even
number.
multiplexed media. Ports are allocated
from this range in pairs, with the first
port number of each pair being an even
number.
The default media port range is 36000
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
to 59999. In Large systems the first 12
ports in the range – 36000 to 36011 –
are used for multiplexed traffic only. In
Small/Medium systems you can either
explicitly specify the 2 ports to use for
multiplexed traffic or use the first 2 ports
from the media port range.
36002 – 59999
UDP (Small /
Medium systems)
UDP (Small /
Medium systems)
or
36012 – 59999
UDP (Large
systems)
UDP (Large
systems)
inbound
outbound
outbound
Configuration >
Traversal Subzone
Traversal Subzone
TURN relay
media port
range
media port
range
Range of ports available for TURN
media relay.
media relay.
24000 – 29999
UDP
UDP
inbound
outbound
outbound
Configuration >
Traversal > TURN
Traversal > TURN
Table 2: Local inbound/outbound ports (continued)
Note that two services or functions cannot share the same port and protocol; an alarm will be raised if you
attempt to change an existing port or range and it conflicts with another service.
attempt to change an existing port or range and it conflicts with another service.
* On Large systems you can configure a range of TURN request listening ports. The default range is 3478 –
3483.
3483.
Remote listening ports
These tables show the default listening (destination) ports on the remote systems with which the
Expressway communicates.
Expressway communicates.
The source port on the Expressway for all of these communications is assigned from the Expressway's
ephemeral range.
ephemeral range.
Service/
function
function
Purpose
Destination port
(default)
(default)
Configurable via
DNS
Requests to a DNS server.
53 UDP
System > DNS
External manager
Outbound connection to an external
manager, for example Cisco TMS.
manager, for example Cisco TMS.
80 TCP
System > External
manager
manager
NTP
System time updates.
123 UDP
System > Time
LDAP account
authentication
authentication
LDAP queries for login account
authentication.
authentication.
389 / 636 TCP
Users > LDAP
configuration
configuration
Incident reporting
Sending application failure details.
443 TCP
Maintenance >
Diagnostics > Incident
reporting > Configuration
Diagnostics > Incident
reporting > Configuration
Remote logging
Sending messages to the remote
syslog server.
syslog server.
514 UDP
6514 TCP
6514 TCP
Maintenance > Logging
Table 3: Remote listening ports