Your setting up Citrix Xen App and you want to know the Citrix Xen App ports /citrix ica firewall ports are so you can open them in your firewall and maybes set up a redirect to you citrix server internally
This is simple to answer but never-less people seem to keep asking the question
The Citrix Xen app ports you require opening on your firewall are
2598 -Session Reliability Service
1603 is not needed if you are going to run the session reliabilty service.
Tags: Xen App