Unified Communications port reference
This section summarizes the ports that need to be opened on the firewalls between your internal network
(where the VCS Control is located) and the DMZ (where the VCS Expressway is located) and between the
DMZ and the public internet.
Outbound from VCS Control (private) to VCS Expressway (DMZ)
Purpose Protocol VCS Control (source) VCS Expressway
(listening)
XMPP (IM and Presence) TCP Ephemeral port 7400
SSH (HTTP/S tunnels) TCP Ephemeral port 2222
Traversal zone SIP signaling TLS 25000 to 29999 7001
Traversal zone SIP media UDP 36002 to 59999 * 36000 to 36001 *
Outbound from VCS Expressway (DMZ) to public internet
Purpose Protocol VCS Expressway
(source)
Internet endpoint
(listening)
SIP media UDP 36002 to 59999 * >= 1024
SIP signaling TLS 25000 to 29999 >= 1024
Inbound from public internet to VCS Expressway (DMZ)
Purpose Protocol Internet endpoint
(source)
VCS Expressway
(listening)
XMPP (IM and Presence) TCP >= 1024 5222
HTTP proxy (UDS) TCP >= 1024 8443
Media UDP >= 1024 36002 to 59999 *
SIP signaling TLS >= 1024 5061
HTTPS (administrative access) TCP >= 1024 443
From VCS Control to Unified CM / CUC
Purpose Protocol VCS Control (source) Unified CM (listening)
XMPP (IM and Presence) TCP Ephemeral port 7400 (IM and Presence)
HTTP proxy (UDS) TCP Ephemeral port 8443 (Unified CM)
HTTP (configuration file retrieval) TCP Ephemeral port 6970
CUC (voicemail) TCP Ephemeral port 443 (CUC)
Media UDP 36002 to 59999 * >= 1024
SIP signaling TCP/TLS 25000 to 29999 5060/5061
* The default media port range of 36000 to 59999 applies to new installations of X8.1 or later. The first 2 ports
in the range are used for multiplexed traffic only (with Large VM deployments the first 12 ports in the range –
Cisco VCS Administrator Guide (X8.1.1) Page 395 of 507
Reference material
Unified Communications port reference
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