What are firewalls and why do you need them
Date Added: Feb 22, 2011
| A Firewall is a security mechanism deployed on a network of computers in order to prevent unauthorised access. A firewall comprises of a single device or a whole network of complex systems that are programmed to allow only specific entities to access to system. Firewalls are usually implemented to prevent unauthorised web users from accessing online networks of private organisations. This helps them to maintain a secure and rigid environment which is free from malicious intrusions.
Companies function around a treasure trove of data pertaining to the businesses and customers and need to ensure that no third party can access it without due permission. As the cyber security landscape is continually changing, threats of unauthorised intrusions and cyber espionage have significantly increased. Firewalls have grown in usage and sophistication over the years and provide high-level protection for the network. In case you are looking for firewall tools for better computer security please visit our firewallsection
Security breaches cause businesses to loose millions of dollars each year and organisations are continually working towards improving their security measures and deploying a firewall is one every one's security check-list. There are four basic types of firewalls that are currently being used across the industry: Packet filter, Application gateway, Circuit-level gateway and the Proxy server firewall. The packet filter is designed to inspect the packets that go through the network and reject them on the basis of the conditions that have been pre-determined.
The application gateway firewall offers protection for specific applications like FTP servers and is highly effective in warding off intrusion attempts. The Circuit-level Gateway firewall gets into action when a TCP connection is established. When the connection is approved by the firewall, the packets are allowed to flow freely. The most effective is the Proxy server firewall which keeps a check on all the messages to and from the network. The firewall effectively encrypts the network addresses.
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