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To filter access (in and out) to network only to a legitimate user.

Common attribute used to filter on a firewall :

1. IP number

2. MAC address

3. DNS

And so you don't have access to any websites that contain:

games

proxies

porn

downloads

chat sites (facebook, ebuddy, MSN INBOX, messenger)

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14y ago
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7y ago

Firewall is a security solution which can be a software of hardware device mainly designed to filter unwanted access to the system.

Firewall is very essential since it protects the system from intruders or hackers who plan to take access over the system. The network entering the system must pass through the firewall, only then the network is considered to be safe. Firewall is programmed with the set of rules, based on which filtering takes place. Generally firewall filters incoming and outgoing traffic, source and destination of the networks, any many more.

Reference: personalfirewall.comodo.com

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Q: What is the firewall. What is the purpose of a firewall?
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