When deploying XenApp, there are a few ports that typically need to be open for the solution to work properly. The most common of these are 1603 and 1604, but you may also need to open 1494 and 2598 as well. And of course, 443 and 80 if you’re doing web stuff. So here’s the list and what they do: Admin: 135 Access Gateway Deployment: 443 App Streaming: 445 Citrix ICA thin client protocol: 1494 Citrix ICAbrowser: 1604 Independent Management Architecture: 2512 Management Console: 2513 Citrix Session Reliability Service: 2598 There are also a number of ports that communicate back into your infrastructure, such as LDAP (can be a RODC),…