With MPS3 Citrix introduced the Citrix License Server component. On this component licenses for most Citrix product are managed nowadays. The Citrix License server is communicating using three ports:

• The License server is by default communicating over port 27000
• The Citrix Vendor Daemon is communication over a variable port number
• The License Management Console is reachable over port 8082.

Often these default values are useable in many infrastructures, but there are reasons to change the default ports:

• The default ports are already in use on the server hosting the Citrix License Server components;
• The Citrix Presentation Server communicates already to another system over the same port as the license server;
• The License Server and the Citrix Presentation Servers (or another Citrix product) are separated by a firewall configuration.