by Marco Maseko

Much like human viruses, computer viruses run the gamut from the benign to the fatally destructive to the computers they infect. And just as with human viruses, prevention is better than cure. Prevention begins by stopping them in their tracks at the portals of contact. This is where a firewall can come in handy.

Windows XP, as well as the new Vista have a personal firewall built into the operating system that is by default turned on. Because it monitors and offers popup warnings many people turn it off, and leave themselves remarkably vulnerable to attack. The Windows firewall default of "on" should be maintained until and unless you find another software or hardware firewall to protect your system.

You will need good anti-virus programs to go after any viruses that may inevitably bypass your firewall. It should be programmed to either quarantine or, preferably, destroy them. Last but certainly not least, it is essential to always keep your anti-viral and firewall programs up to date with the newest patches and security updates. Most viruses target your C: drive, so scan it daily. And never, ever open any unsolicited emails or the attachments that come with them.

AVF insider

An insidious tactic that the spammers employ is called "Phishing." It involves the spammer sending out junk email that is specifically designed to look like it is from a reputable, legitimate source such as a reputable company like ebay or paypal. This spam utilizes the company's logo and official graphics.

Spam is no longer harmless, silly, or simply annoying. It is increasingly harmful and we need to protect against it.

How do these spammers get your email address?

The spammers collect these addresses using automated programs called spambots. Spambots are designed to harvest the email addresses from these web sites. They scan every page on the site, collecting any text containing the symbol "@" they find. The email addresses they collect are compiled into a database, loaded into a bulk-emailing program and out goes the spam. Often, these harvested email addresses are also sold to other spammers ; once you email address makes it to a spammer's mailing list, it will make it onto their fellow spammer's lists.

One way to defend against this is to make it more difficult for the spider to harvest your email. When you place your email address on a web site, remove the @ symbol and replace it with the word "at." This makes it far more difficult for the spam harvester to gather your address, because it cannot be gathered mechanically; it can only by read by a human who is actually reading the site. Alternatively, you should display your email address as an image rather than as text.

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