Make Your PC Hacker-Proof
When you're wired to the Internet, how do you protect your PC from hackers? A personal firewall will alert you if anything's amiss and keep the intruders at bay. We put six products through their paces to see which ones do the best job of barring the doors and windows.
Close the Windows
So how can Windows users protect themselves? Before you install any new software, you should perform some simple housekeeping on your operating system to make it safer. The first step is to check the Microsoft Web site for security updates and patches. If you have Windows 9x, Windows NT, or Windows 2000 Professional, point your browser to the Windows Update site and follow the links there to find the updates for your particular operating system.
In addition, David Ursino, Microsoft's product manager for the new Windows Millennium Edition, recommends disabling the File and Printer Sharing option that provides other computers access to a machine running any version of Windows. Go to Start, Settings, Control Panel and double-click the Network icon. In the dialog box that opens, search the list of installed network components for "File and Printer Sharing for Microsoft Networks." If this item is present, highlight it and then click the Remove button beneath the list of components.
Another way you can protect yourself is to use software that blocks Trojan horse programs. Any good antivirus package is designed to identify Trojan horses, but you must keep it up-to-date to defeat the latest subterfuges. You should also make sure your e-mail program is not set to open attachments automatically. And never open an attachment that you don't recognize or that comes from an unknown source.
These measures alone, though, will guarantee security for only a minority of PC users. "Unless you've installed your system from scratch, there's no way of knowing just how secure it really is," says Stuart McClure, coauthor of Hacking Exposed. Security breaches can occur on many fronts, typically through Internet software--like PC Anywhere, Net Meeting, or ICQ--that opens ports hackers can subsequently exploit. Even Microsoft's Ursino sees the need to add another layer of security. "If I were a user who had a home network with a persistent Internet connection," he says, "I would choose to have a firewall."
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