Information Technology Reference
In-Depth Information
Port
Purpose
Cisco Unified Communications Manager Attendant Console (AC) server line
state port receives ping and registration message from, and sends line states to, the
attendant console server.
3223 (UDP)
Cisco Unified Communications Manager Attendant Console (AC) clients register
with the AC server for line and device state information.
3224 (UDP)
Cisco Unified Communications Manager Attendant Console (AC) clients register
to the AC server for call control.
4321 (UDP)
AXL/SOAP API for programmatic reads from or writes to the CUCM database
that third parties, such as billing or telephony management applications, use.
8443 (TCP)
2444 (TCP)
CTL provider listening service in an ASA firewall.
280 (TCP)
HTTP port to HP SIM.
2301 (TCP)
HTTP port to HP agent
2381 (TCP)
HTTPS port to HP agent.
25375, 25376, 25393 (UDP)
COMPAQ Management Agent extension (cmaX).
50000-50004 (TCP)
HTTPS port to HP SIM.
Firewalls and Application Layer gateways
Firewalls are commonly used to protect networks, including those that transport voice traffic. Firewalls inspect the headers and, in
some cases, payload of packets to ascertain which traffic they should permit and which traffic they should block. Stateful firewalls
also maintain state information so that they know which traffic forms part of permitted flows and should be allowed.
In the case of voice traffic, several protocols and ports must be permitted to ensure that voice operates correctly across firewalls.
These protocols include MGCP, H.323, SIP, SCCP, RTP, and RTCP. In the case of RTP and RTCP, the number of ports that could
potentially be used number in the thousands.
Table 7-1
in the section, “TCP/UDP Port List,” lists the protocols and ports that firewalls should permit for CUCM to operate
correctly.
