Choose Your Own Firewall

Firewalls let you monitor and block unwanted communication between your PC and other computers. You're particularly at risk if you have an always-on-connection to the internet via cable modem or DSL (digital subscriber line).

While Windows XP comes with its own firewall, if you're using Windows 9X or Me, or if you want a more powerful firewall than the built-in-one, you should install a third-party firewall. There are some excellent firewalls available, including Zone Alarm (www.zonelabs.com) and Sygate Personal Firewall (www.sygate.com/products/shield_ov.htm), both free for personal and non-profit use and designed for cable and DSL connections. Other worthwhile products are Zonealarm Pro, McAfee Personal Firewall and Norton Personal Firewall.

You'll need to spend some time when you initially install the Firewall training it to recognize which contacts are welcome and which are unwanted. After that initial period, your firewall will do the job pretty much on its own.

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