An anti-spam firewall application will, to an extent, help in keeping viruses at bay. There is, however, no firewall that is 100% hacker proof - there are too many ways in which viruses can be embedded in a software download or regular data, for a firewall to detect and catch them all. However there are some relatively effective firewall programs available on the market, and some of them are actually free for your personal use.

An ideal firewall will hide the ports that a hacker might use to gain access to your PC and protect your home PC from attacks, as well as track those attempted entries and prohibit unauthorized access or output from your computer. Two-way firewalls are the best as they block the threats that are incoming OR outgoing, to prevent things such s virus, Trojans or malware from being installed without you knowing it.

The good thing about firewall is the monitoring of the outgoing and incoming of programs through your internet connection. So you definitely monitor what's going on when working on the internet.

AVF insider

The purpose of this type of spam is to get your personal and financial information. Often it will fraudulently send you to web sites where this information regarding email, finances, bank accounts or other personal info is gathered and used in illegal ways. Very often, the spammers will combine methods, spamming their victims with virus-laden software, phishing and other schemes that take spam to a whole new level of illicit, criminal activity.

A 2006 study by Consumer Reports estimated that in two years, Americans spent more than $7 billion on repairs and parts replacement resulting from viruses, malware and spyware. This does not take into account the cost to the Internet Providers who have to pay for all the bandwidth taken up by the spammers junk, or the cost in time, money and productivity to businesses that have to sort through all the spam.

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.

Another method commonly used by the spammers is to target a domain. They simply guess or make up every possible variation of email address based on the domain name, for example @yourDomain.com . They create a mailing list of these addresses and then spam them. Corporate emails are especially vulnerable, as their emails have a distinct format such as @BusinessName.com.

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