Feb 19, 2015 at 3:31 PM
Edited Feb 19, 2015 at 3:56 PM
After testing we found this:
We used the GPO of 2008 R2 with the entry
Windows Firewall with Advanced Security
which Windows XP does not accept.
We replaced that 2008 R2 GPO and added this GPO:
Computer - Admin. Templates - Network Connections - Windows Firewall: Define inbound program exceptions
Thanks to all supporter!