New Post: Which ports to open in firewall

Hi,
I started using the WPP and it's working great!
For now it's still in testing but soon I'm going to move it to production environment
I have problem with XP firewall inside the domain, when the firewall is enabled (and it's enabled for all the workstations) the "Detect Now" and the "Report Now" won't work.
Is there any firewall rule which need to be enabled? What am I missing?
Thanks for the help