Firewall can be a part of computer system or network, which is intended for blocking unauthorized access. It can be a device or a collection of devices for permitting, denying, encrypting, decrypting all computer traffic for maintaining security.
Firewall can be implemented through many techniques, packet filter, application-level gateway, circuit-level gateway and proxy server. It can be implemented in hardware or software or can be a combination of both. You can utilize personal firewall if you want to maintain security of your important data.
An application, which is able to check incoming and outgoing traffic of a computer system on the basis of security policies, can be named as personal firewall. Some of its features are as follows:
Personal firewall is able to hide the computer from port scans because it will not respond to unwanted network traffic. It alerts the user about outgoing connection attempts. This application can monitor those applications which are listening for incoming connections.
Personal firewall offers the information about those applications which makes connection attempt. It is able to monitor and regulate all incoming and outgoing Internet users. Along with many advantages, it has some disadvantages like it consumes system resources. This firewall can interact with the operating system at kernel mode level which can introduce security issues and software bugs.
BitDefender provides user a firewall that will protect your computer, and you need to set BitDefender firewall on Windows 7.
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