Citrix ports

Citrix License Server
License Manager Daemon	TCP	27000	Handles initial point of contact for license requests (Lmadmin.exe)
Citrix Vendor Daemon	TCP	7279	Check-in/check-out of Citrix licenses (Citrix.exe)
License Management Console	TCP	8082	Web-based administration console (Lmadmin.exe)

Common Citrix Communication Ports
Citrix Receiver	TCP	80/443	Communication with Merchandising Server
ICA / HDX	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)

XenApp
Offline Plug-in	SMB	445	Communication with Application Hub (File Server / Share)
	HTTP/S	80/443	Communication with Application Hub (Web Server / File Server / Share)
Power & Capacity Management Agent	TCP	11168	Communication with Concentrator
Database	TCP	1433	Microsoft SQL Server
	TCP	1434	Microsoft SQL Server. Note: Named instance connection requires UDP 1434

Other Citrix ports:

http://support.citrix.com/article/CTX101810/