Windows Firewall is the UI used to change filtering settings.

This is necessary because the Windows Firewall supports different "modes"
that a logical "network" can be set to, such as private, public, and domain
that all have different rules... so the rules are no longer attached to a
network interface but a mode.

- Click Start - Control Panel - System and Maintenance - Administrative
Tools
- Double-click Windows Firewall with Advanced Security

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- JB

Windows Vista Support Faq
http://www.jimmah.com/vista/