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Hacker programs called "port scanners" rapidly scan all the ports to your computer to find an opening to your computer. Once in, these programs typically run other programs and downloads that can steal your credit card number and other information, gather data to steal your identity, damage your system, and more. This kind of unauthorized access is exactly what a firewall is designed to stop.
It outsmarts the most sophisticated hackers
Another way that hackers get into your computer is through a phenomenon called "security holes." Security holes are the unwatched "back doors," unintentionally created as software is developed. Trojan horses and worms are especially known to take advantage of these weaknesses. The trouble is that hackers can get around a basic inbound firewall by exploiting security holes you didn't even know were there. Only an outbound and OSFirewall can stop them.
It must catch bad guys even if they sneak past the firewall
As we saw above, security holes can allow hackers to get by firewalls that only have inbound protection. That means that your valuable information could then be transmitted to the hacker, unless your firewall was capable of automatically blocking unauthorized outbound communications.
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Essential antivirus, anti-spyware, and firewall protection for your PC.
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