How to Change the ICA Port Number Assignment

Use the ICAPORT utility from a command prompt. The output of ICAPORT /? is shown below:

Change value of TCP/IP port for ICA Terminal Sessions.
ICAPORT {/QUERY | /PORT:num | /RESET}
/QUERY Query current setting.
/PORT:num Change the TCP/IP port to 'num'.
/RESET Reset the TCP/IP port to 1494.

The value of the port number is stored in hex at the following registry DWORD value:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\ICA-tcp

Type ICAPORT /PORT:XXX where XXX represents the port number from 0 to 65535.

2. Restart the XenApp server for the change to take effect.

3. Modify the necessary client connection parameters to connect to the server on the new port number. For example, add :XXX after the server address or published application name, where XXX is the assigned port number established in Step 1.

NOTE: Running ICAPORT /RESET sets the port back to the default value of 1494.

citrix port numbers

Citrix Ports

License Manager Daemon	TCP	27000	Handles initial point of contact for license request
Citrix Vendor Daemon	TCP	7279	Check-in/check-out of Citrix licenses
License Management Console	TCP	8082	Web-based administration console
Communication Ports Citrix Receiver	TCP	80/443	Communication with Merchandising Server
ICA	TCP	1494	Access to applications and virtual desktops
Session Reliability	TCP	2598	Access to applications and virtual desktops
IMA	TCP	2512	Independent Management Architecture (IMA)
Management Console	TCP	2513	Citrix Management Consoles
Application / Desktop Request	TCP	80/8080/443	XML Service
STA	TCP	80/8080/443	Secure Ticketing Authority (embedded into XML Service)
RDP	TCP	port 3389	To access the windows desktop remotely