Die hier scheint ganz gut zu sein:

Author: WyvernWorks Dot Com
Description: Firewall is our premier solution for intrusion detection and prevention. It will definitely put your mind at ease. It’s fully configurable to maximize security without restricting your surfing habits. It works safely and securely with all connection types and ISPs!

What clearly sets Firewall apart from other commercially available firewalls is its unique ability to prevent internal attacks caused by Trojans! Firewall detects and prevents any unauthorized program on your computer from accessing the Internet without your permission!

http://www.wyvernworks.com/download/firewall.exe

oder diese:

Author: Jetico. Inc.
Description: Jetico Personal Firewall protects your computer from unwanted hacker's attacks from outside
as well as from malicious programs "living" secretly inside your computer's memory and hard drive.
Three levels of protection are included: low-level network packets filtering, application-level network events filtering and filtering of user-level process activity.
Jetico Personal Firewall checks every packet that comes in or out of your computer. Using configuration sets for Security Policy you define how your computer is connected to the local network and the whole Internet. Your computer may be completely hidden from any unfriendly attempts to access your hard drive while you are able to access any web sites you want and you decide on which applications are allowed to access Internet and which are not.
With Jetico Personal Firewall you feel secure, safe and protected while enjoying all Internet activities.

http://www.jetico.com/jpfwall.exe

Muessen aber beide gechecked werden ob sie unter Vista laufen......einfach mal auf der Hersteller Seite nachlesen.

Beide sind kostenlos !

Cheers
FOTH

__________________

"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"