To enable Internet Connection Firewall:
1.. Open Network Connections
2.. Click the Dial-up, LAN or High-Speed Internet connection that you want
to protect, and then, under 'Network Tasks', click 'Change settings of this
connection'.
3.. On the 'Advanced' tab, under 'Internet Connection Firewall', select
the 'Protect my computer and network by limiting or preventing access to
this computer from the Internet' check box.
Rocky