Ports open back to the view client

Hi,

I have seen many different information regarding ports and what needs to be open for a vmware view client that connects to a security server behind a firewalll.

What I need to confirm is the following

Do the firewall need to open port UDP 4172 from the source security server and out to the internett since this is reply UDP pack?

I have seen links that inform about this, and links that doesnt... problem is related to black screen and disconnect when we use pcoip and works ok with rdp.

Thanks for answers.

/R

Ole