The term “fire wall” originally meant, fireproof wall which prevents the fire from entering one place to another place. The Internet is very unsafe environment when viewed from a computer-security perspective Firewall provides you the Network security.
A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet and steal your important data. Firewall checks every data packet if it is harmful for the PC Firewall blocks that particular data packet. Nows days Firewall is the necessary thing for every PC. It helps us in various forms as written below.
- If you use a computer at home, the most effective and important first step you can take to help protect your computer is to turn on a firewall.
- Windows 7, Windows Vista, and Windows XP SP2 or higher have a firewall built-in and turned on by default.
- If you have more than one computer connected in the home, or if you have a small-office network, it is important to protect every computer. You should have a hardware firewall (such as a router) to protect your network, but you should also use a software firewall on each computer to help prevent the spread of a virus in your network if one of the computers becomes infected.
- If your computer is part of a business, school, or other organizational network, you should follow the policy established by the network administrator.