Firewall is to separate a secure area from a less secure area & to control communications between the. A firewall is a set of selected programs, aimed at a network aperture server that protects the assets of a private network from users from added networks.

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Firewell is a program on the net that is protect from the any assault through the net on your computer,Operating systems include firewalls based application to protect against threats from the public Net.So its for the safety and the security purpose.Zone alarm is of the great Firewall which you can use.

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A firewall is a set of related programs, located on a server in the network gateway that protects the resources of a private network from users from other networks. A company with an intranet that allows its workers access to the Internet in general is installing a firewall to prevent outsiders from accessing its own private data resources for the control of resources outside their own users have access.

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Great question here. I think I have enable some firewall software in my system. I use Microsoft Firewall, Zone Alarm. It does'nt cost you alot. It help your system from data theft and virus. If you use these firewall then you will be safe on your work and data file.

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Firewall protects computers from intentional hostile intrusion that could compromise confidentiality or result in data corruption or denial of service

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Other technique is the Application gateways. It is quite effective as it applies security norms to the applications like FTP and Telnet but subsequently leads to performance degradations. The Circuit level gateway also applies security norms like application gateways whenever a UDP or TCP link is established. Data packets thus move between the hosts without further inspection. In this way proxy server intercepts the messages entering and leaving the network and thus successfully hides the real network addresses.


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A firewall is a security tool, it can be a computer application or a dedicated network device. The main purpose of a firewall is separate from the less secure areas of regional security and control of communication between. Firewall can perform many other functions, but mainly responsible for the control of others when you connect to the Internet can not access your computer through a port of the inbound and outbound communication.so, it basically to prevent others from entering the port of your machine to ensure its security.

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A firewall is a computer system or network, its purpose is to prevent unauthorized access, while allowing communication.This part of the authorization is an attachment or it is configured to allow or deny rules, and computer-based set of other applications the guidelines.

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