It is always nice to a have a consolidated place to find what you are looking for, and in case you are in need of specific ports that concern Citrix XenApp environments, then please use this as a guide.

 

<!--more-->

80 - Port is used by client/plug-ins using TCP+HTTP to communicate with servers

443 - Port is used by SSL Relay to secure communications between the Web Interface and Citrix Server Farm

1433 - This port is used by the server to communicate with SQL database

1494 - Port is used by clients/plug-ins using TCP to communicate with server (must be opened for ICA to work properly)

1521 - This port is used by the server to communicate with Oracle database

2512 - Port is used for server to server communications within the Citrix Farm

2513 - This port is used for XenApp Advanced Configuration tool communications (formerly Presentation Server Console)

2598 - Port is used for Session Reliability

5000 - Port is used to communicate with IBM DB2 database

7279 - Port is used by Citrix vendor daemon to relay licensing communications between XenApp and the Citrix Licensing Server

8082 - Port is used for communication with Citrix License Management Console

27000 - Port is used by Citrix License Managemer daemon, which handles initial contact with Citrix XenApp Server that in turn passes the connection to the Citrix Vendor daemon.

 

For more information - go <a href="http://community.citrix.com/display/ocb/2008/03/12/Network+Communication+Ports+used+by+Citrix+XenApp+%28the+new+name+for+Presentation+Server%29">HERE</a>.