Cisco Cisco Expressway
Appendix 2: IP Ports and Protocols
External Firewalls Between Peers
It is unusual to have any sort of external firewall between cluster peers, but if there is, the IP protocols and ports that
must be open between each and every Expressway peer in the cluster are listed below.
must be open between each and every Expressway peer in the cluster are listed below.
For cluster communications between Expressway peers:
■
TCP port 4371 is used for cluster recovery (over TLS)
■
TCP port 4372 is used for cluster database synchronization (over TLS)
For calls between Expressway peers:
■
Standard SIP and H.323 signaling ports are used for calls
■
UDP port 1719 is used for bandwidth updates between Expressway peers
Firewall Rules on the Peers
If you are using the Expressway's built-in Firewall rules feature, make sure that your rules allow the following
connections:
connections:
Purpose
Protocol
Source
Port
Destination
Port
Cluster communication
TCP/TLS
Other peers
Ephemeral
This peer
4372
Cluster recovery
TCP/TLS
Other peers
Ephemeral
This peer
4371
Table 2 Clustering Connections
Cisco TelePresence Management Suite Provisioning Extension
35
Cisco Expressway Cluster Creation and Maintenance Deployment Guide
Appendix 2: IP Ports and Protocols