What is an internet firewall?
An internet firewall is a system or cluster of system that enforces an access control policy between two or more networks. Firewall can be a pair of mechanism in which one performs blockage and the other is permission. As said in above statement, firewall enforces an access control policy in which it depends on it of what kind of access to be allowed or denied. If you have a good idea about what access to be denied and allowed, firewall will be useful. Firewall has configuration which should be updated and given emphasis to enforce the policy. The importance of a firewall is that it protects you from being intruded or keeping out bad ‘stuffs’ out of your network while doing or finishing your job. Firewall is often used by huge corporations for the purpose of protecting the data about corporate products and services or files to download and the like. Firewall is like a preventive measure that guards your network from any harmful ‘stuffs’ that can corrupt important data.