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Q: What is a firewall and do I need one?

Jun 03 2008

Answered by: Chris Lindsay Ask a question

A firewall is a system that secures a network, shielding it from access by unauthorised users. It is literally a hardware or software solution to enforce security policies. It works as a security barrier placed between an organisation’s internal computer network, either its IS system, intranet or internet. A firewall can be used to discover, prevent, or mitigate certain kinds of secure server network attack.

Many people think that since they do not keep credit card numbers or sensitive financial information on their computer, then they do not need to be concerned about attacks. However, this is a must for businesses whose data can hold sensitive information and company details. Without a firewall, a PC can be compromised with viruses, worms, or even just spyware.

In fact as high-speed broadband connections are becoming the norm across businesses, not having firewall protection in place is like leaving your car door unlocked. You just shouldn’t risk it.

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