Firewalls protect private local area networks from hostile intrusion from the Internet. Consequently, many LANs are now connected to the Internet where Internet connectivity would otherwise have been too great a risk.
Firewalls allow network administrators to offer access to specific types of Internet services to selected LAN users. This selectivity is an essential part of any information management program, and involves not only protecting private information assets, but also knowing who has access to what. Privileges can be granted according to job description and need rather than on an all-or-nothing basis.
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Firewalls are filters that filter any information passing from and into your computer when you are surfing the Internet. It is up to you to set a filtration level where you can say what information gets in and what gets out. Many people believe that the firewalls are the first level of security and they are not far from the truth. There are many benefits of using firewalls.
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