Някой ме питаше как се прави това... случайно ми попаднаха тези линкове.
Q308127 How to Manually Open Ports in Internet Connection Firewall in Windows XP: http://support.microsoft.com/default...;EN-US;Q308127
Q283673 How to Enable or Disable the Personal Firewall Feature in Windows XP:
http://support.microsoft.com/default...;en-us;Q283673
Q307554 Programs Require Manual Port Configurations with Internet Connection Firewall:
http://support.microsoft.com/default...;en-us;Q307554