We are evaluating Horizon. We have installed the connection server - but ran into a problem. It want to connect to our vCenter but our vCenter is on a separate subnet (management). I am sure this is pretty common but I can't find any documentation on what I need to do to connect it.
on your FW, you must allow the communication between the 2 servers... from Connection to vcenter through 443 TCP port
You can find every port on vmware environment to https://ports.esp.vmware.com/