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.

[proxyhotdeals]

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

[Dam Ponting]

It protects from an Unauthorized access.It is a product program or bit of equipment that helps screen out programmers, infections, and worms that endeavor to achieve your PC over the Internet.

[davidweb09]

Firewall help to protect your PC from viruses.

[manoharparakh]

A firewall is a software utility or hardware device that acts as a filter for data entering or leaving a network or computer. You could think of a firewall as a security guard that decides who enters or exits a building. A firewall works by blocking or restricting network ports. Firewalls are commonly used to help prevent unauthorized access to both company and home networks.

https://esds.co.in/security/vtmscan

[gautamsharma]

Firewall is network security device which prevent from unauthorized access.

[Pratiksha]

Firewalls carefully analyze incoming traffic based on pre-established rules and filter traffic coming from unsecured or suspicious sources to prevent attacks. Firewalls guard traffic at a computer’s entry point, called ports, which is where information is exchanged with external devices.

[Pratiksha]

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

[Pratiksha]

A personal firewall guards users against internet threats by performing security policies that restrict network communications in and out of a computer. A personal firewall is greatly important for computers with a static IP address or one with a stable IP address, such as with cable modems or DSL.

[Pratiksha]

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules

[Freya009]

A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized Internet users from accessing private networks connected to the internet, especially intranets.

[Pratiksha]

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

[lishmalinyjames]

A firewall is a security device — computer hardware or software — that can help protect your network by filtering traffic and blocking outsiders from gaining unauthorized access to the private data on your computer. The key is determining how much protection you need.