There is always a chance that some may break into your computer, gain access and control your computer to do malicious acts without your permission. A firewall acts like a filter for the data that's going in and out of your computer. If it detects that a program is trying to access the Internet or your local network without your permission, it will stop such activity. Also, if a hacker or any other user tries to gain access to your computer without your permission, it will block all such activity too. The Windows Firewall that comes bundled along with Windows XP SP2 is woefully inadequate when it comes to protecting your computer.The key to running a firewall efficiently is to configure it right. When it comes to configuring, the key steps to remember are these:
a) If you do not know the program, deny it access to the Internet and the local network.
b) Never allow the software to "remember" the access rights for a program, that is, do not wantonly check the "I know this program. Do not ask me again" for programs that you are not absolutely sure about.
c) Some Windows processes need access to the Internet or your local network to work the way its supposed to. Make sure you check the name of the program and its use before you allow or deny access.
d) Unless you run a server or play/host online or network multiplayer games, go ahead and deny inbound access to all programs except your mail clients, browsers, etc.
e) Do not allow programs to connect to the Internet unless they absolutely need to. So while Adobe Acrobat checks for an update with its servers when you start it up, thats OK. But when you are planning to play Quake 3 Arena offline and it tries to connect to the Internet, go ahead and deny it access this time around.Good firewalls include;
- ZoneAlarm (Free) (The best among them all, when you configure it right)
- Kerio Personal Firewall (Free)
- SyGate Personal Firewall Standard (Free )
- Kaspersky Anti-Hacker v1.7 (Trial)
- Norton Personal Firewall 2005 (Trial)
- McAfee Personal Firewall Plus (Trial)
- Trend Micro PC-Cillin Internet Security 2005 (Trial)
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