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Securing Your Business with Cisco ASA and PIX Firewalls by Greg Abelar

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Network Attacks: A Serious Problem

Every device that connects to the Internet is subject to security threats. The risk of network and host attacks not only affects businesses that sell goods via the Internet but also any computer that connects to the Internet at any time. Internet-connected hosts can be attacked from many different sources and in many different ways. A host can be infected with worms and viruses through e-mail, web pages, or almost any network service.

The impact on computers that have been attacked can be as benign as a pop-up message that does no harm to as harmful as the removal of critical files causing computers to crash, consequently destroying critical data. The attack that most people fear the most is the theft of confidential ...

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