What is Firewall?

[StuartSpindlow1]

Hello Friends,

Please tell me what is firewall.

[pablohunt2812]

What is a Personal Firewall?
A personal firewall protects users from internet threats by implementing security policies that restrict network communications in and out of a computer. A personal firewall is extremely important for computers with a static IP address or one with a stable IP address, such as with cable modems or DSL.
For example, a Personal firewall is important when,
You surf the internet at home using an 'always on' broadband connection
You connect to the internet via a public WiFi network in a park, cafe or airport
You run a home network which needs to be kept isolated from the internet
You wish to be kept informed when any program on your computer attempts to connect to the internet
Most Personal Firewalls are highly configurable so you can easily create security policies to suit your individual needs.

[bestpolesaw]

A firewall is a network security device that grants or rejects network access to traffic flows between an untrusted zone.

[moria]

A wall or partition designed to inhibit or prevent the spread of fire.

Computing
a part of a computer system or network that is designed to block unauthorized access while permitting outward communication.

[RH-Calvin]

A firewall is a network security system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both.

[bestpolesaw]

A firewall is a network security system, either hardware- or software-based, that controls incoming and outgoing network traffic based on a set of rules.

[jankosoft]

firewall is a wall or partition designed to inhibit or prevent the spread of fire.
verb COMPUTING. protect (a network or system) from unauthorized access with a firewall.

[adamdalena]

A firewall is a network security system, either hardware- or software-based, that controls incoming and outgoing network traffic based on a set of rules.

[bestpolesaw]

A firewall is a set of related programs, located at a network gateway server, that protects the resources of a private network from users from other networks.

[cordtec]

SEO Suite needs to connect to the internet to run, so some firewall or anti-virus software may affect the running of SEO Suite if not set up properly.