What is firewall?

[danialrobart]

What is firewall?

[vishalesskay]

A firewall is a hardware based network security system that controls the network traffic. Firewall can be implements both in hardware and software. It used to prevent unauthorized Internet users from accessing private networks connected to the Internet.

[onlinebigboss]

firewall is a program

[drwebsites]

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

[RH-Calvin]

Firewall is a program that allows to restrict programs to run on your computer. It helps to filter out various programs and websites on your system.

[akashram]

Firewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic based on applied rule set. A firewall establishes a barrier between a trusted, secure internal network and another network that is not assumed to be secure and trusted

[marybrosz]

Hello
A firewall is a set of relevant programs, situated at a network gateway server, that defends the sources of a private network from users from other networks.




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[Olin Lamanna]

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

[juliavasa5]

The part of a computer system or network that is designed to block unauthorized access

[Rush_Alien]

A firewall is software or hardware that checks information coming from the Internet or a network, and then either blocks it or allows it to pass through to your computer, depending on your firewall settings.

A firewall can help prevent hackers or malicious software (such as worms) from gaining access to your computer through a network or the Internet. A firewall can also help stop your computer from sending malicious software to other computers.

The following illustration shows how a firewall works.

Illustration showing how a firewall creates a barrier between the Internet and your computer
Just as a brick wall can create a physical barrier, a firewall creates a barrier between the Internet and your computer
A firewall isn't the same thing as an antivirus program. To help protect your computer, you need both a firewall and an antivirus and anti-malware program.

[StuartSpindlow1]

Firewall is a kind of program.

[vacurect]

Firewall is the security tools which apply on the out side of networks . so that you can restrict the bad website or harmful content.

[harry26]

Firewall is program that used to prevent unauthorized Internet and allows to restrict programs to run on your computer.

[Sameer Shoakat]

Hi everyone,
Actually firewall is hardware security program which is beneficial for control the incoming and out going based traffic according to my self .
Regards:
Sameer shokat .

[frankmyspy]

Firewall is a kind of hardware based network security system.

[danielroach01]

Hello Everyone,
Firewall is basically a software program or say a piece of hardware that helps protect your system from the internet threats based on the set of rules.

[nathankian]

A firewall intercepts all communications between you and the Internet and decides if the information is allowed to pass.

[excelcare01]

Firewall is a king of program which apply on the out side of networks.

[riprook7]

A firewall is a system designed to prevent unauthorized access to or from a private network.

[chrisgeitz]

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.

[irfan]

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.

[vickersventure]

A firewall is a hardware based network security system that controls the network traffic.

[scarceclose]

To prevent unauthorized access to a private network. ISP will do this for you.

[hebeba]

lovely question ever :D... but ir ealy enjoyed such kind replies from member of the hostsearch :)

[Michael Parker]

Thank you for your suggestion.

[ajay49560]

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.

[crescendo]

A firewall is a network security system , either hardware or software based that allows or blocks traffic into and out of a private network or the user's computer.Firewall acts as a barrier between a trusted system or network and outside connections, such as the Internet.A firewall can be implemented in both hardware and software,or a combination of both.Many businesses and organizations protect their internal networks using hardware firewalls.

[ServeYourSite]

What is firewall?

Overall a firewall is a security system and it can be either software or hardware based. Its purpose is to control incoming and outgoing network traffic.

[Stephanie111]

Hi Guys,

Firewall is very use full for network security system like network traffic, unauthorized Internet users etc.

[riprook7]

Informative information thanks for sharing.

[nomanali]

Firewall allows only that traffic onto the network which is complying to the firewall policy, other than that access is denied.

[weddingsparkler]

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.

[ramskl]

A firewall is a hardware based network security system that controls the network traffic. Firewall can be implements both in hardware and software. It used to prevent unauthorized Internet users from accessing private networks connected to the Internet.

Nice thread dudde.

[sigmatestcenter]

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.

[Alanah_Rae]

protect (a network or system) from unauthorized access with a firewall.

[poojasl1]

Firewall is used for security purpose like prevent unauthorized person, network traffic etc.

[jamesnader]

Firewall is a one type of network security system. It's a control of in coming and out going traffice based on a seat of rules. It's prevent for unauthorized access to or from a private network. It's implemented in both hardware and software or a combination.

[sigmatestcenter]

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.

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[decyjohn]

A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. If you can’t start Windows Firewall or you are getting an error, use our free tool to diagnose and fix problems.

[DjuniorT]

Some people tend to use their Firewall in conjunction with the Features of VPN (http://www.vpnfreaks.com/10-features-to-look-for-when-buying-a-vpn/) that can help them mask the IP address they are using and is a good defence against attackers looking to hack or steal your sensitive information.

[jankosoft]

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.

[johnroyal]

Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

[aaronbrad]

Firewall is an application that helps to create barriers to un authorized access and intruders. Some firewalls come with additional features combined with other services.

[decyjohn]

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.

[ragulaussie]

A firewall is a system designed to prevent unauthorized access to or from a private network.

[Bluesky94]

In computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted, secure internal network and another outside network, such as the Internet, that is assumed not to be secure or trusted. Firewalls are often categorized as either network firewalls or host-based firewalls. Network firewalls filter traffic between two or more networks

[24x7servermanag]

Firewall is actually a system of security for the computers using the network connections either for the internet or for any other purpose. It prevents the unauthorized access from any sort of private computer to your own network.

Firewalls can be installed in the computer in both ways either as hardware or software or sometimes used as a combination. It is required for the prevention of the trespassing of ones private networking connected to the internet, especially involving the use of the intranet.

The working criteria of the firewall is such that every data transmission of the internet first passes through the firewall system and only those messages which pass a certain security criteria are allowed to get through; otherwise the other data is blocked, making it inaccessible for the unauthorized users.

The firewall involves several different techniques one of them is the Packet filter. This is a simple technique of security for the firewall system. It keeps a check on the packets which enter and leave your computer network and then verifies them according to rules previously defined by your network user so as to allow or reject their passage through the network. The packet filtering is transparent to the network users, but its configuration is difficult and requires professional help.

The other firewall techniques include the Application gateway, which is targeted to specific programs such as the FTP, followed by the Circuit-level gateway which is required for the TCP and the UDP connections. And lastly the Proxy servers, which is most commonly used these days for the internet security system.

Firewall is actually considered to be the primary and the first line of defense for the security reasons.

Firewall used to block the certain network traffic on your server due to set of rules which you have define. It works as barrier between the trusted and un-trusted network. It is the key component which secure our server from the attack.

Firewall management rules -

It consist of two policies as below -

1. Default Deny policy
2. Default allow policy

There are set of rules define which define which traffic to allow or which connection to allow on the server and which connection to refuse or block.

Once you define the rule then you will need to configure the firewall on the server.

[davidsmith21]

A firewall is a system security framework, either equipment or programming based, that utilizations tenets to control approaching and active system movement.

[janetparkervc]

A firewall is a network security system, either hardware- or software-based, that uses rules to control incoming and outgoing network traffic.

[alinaamel]

Firewall is a kind of hardware based network security system.

[maxbrainer]

Firewall is a term that is used to explain the protection of network traffic on your computer. One use could be to prevent "hackers" from accessing and stealing your personal computer programs.

[saurabh mathur]

A firewall is software or hardware that controls the network traffic. It is a part of a computer system or network that can help prevent hackers or malicious software (such as worms) from gaining access to your computer through a network or the Internet.

[DanielDP]

Firewall is a fence wall between an local network and some other networks control traffic between these two networks

[Shwetha]

I referred this article then got complete information about firewall which is very informative refer this link to know more https://www.vps9.net/blog/firewall/

[Ayisha1109]

Firewall is a network security system,hardware and software based security system.Which is use for control the incoming and outgoing network traffic.

[PaulHel64]

Good answers here

[blackmagicislam]

firewall is a internal security of windows
firewall protect us from malware and intruders

[salman gee]

A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. If you can't start Windows Firewall or you are getting an error, use our free tool to diagnose and fix problems.

[cbitssexp]

Firewalls are tools that can be used to enhance the security of computers connected to a network, such as LAN or the Internet.

[sslstoreindia]

A firewall is a network security device that monitors traffic. It allows, or blocks traffic based on a defined set of security rules.

[davidsmith21]

Firewall is designed to block unauthorized access in the network.

[sslstoreindia]

A firewall is a network security device that monitors traffic to or from your network. It allows or blocks traffic based on a defined set of security rules.

[davidsmith21]

Firewall is a network security system. It is a designed to prevent unauthorized access to or from a private network. Firewalls can be implemented as both hardware and software.

[Talaa]

A firewall act as a shield between your site and the hackers. It can monitor incoming traffic and block common security threats from reaching your WordPress website. This can help prevent brute force attacks and even DDoS attacks from compromising your online business/blog. If you are running a website, you'd better to install a firewall plugin. Yoast seo is my favorite WordPress firewall plugin (https://wpvivid.com/8-best-wordpress-firewall-plugins.html).

[vedicastrologym]

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.

[bmINDIA]

The information is useful.thanks

[horizonmeta]

A firewall is a network security system that use to control incoming and outgoing network traffic based on predetermined security rules. A firewall typically make a barrier between internal network and untrusted external network, such as the Internet.

[bmINDIA]

Thanks to show the interest.

[HosTechS]

A firewall is a software used to maintain the security of a private network. For better safety, the data can be encrypted. Firewalls can be a hardware or software but the ideal configuration will consist of both.

[Lukedawn]

firewall is a software program that prevents unauthorized access to or from a private network

[vedicastrologym]

In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.

[Servers Base]

A firewall is software used to maintain the security of a private network. Firewalls block unauthorized access to or from private networks and are often employed to prevent unauthorized Web users or illicit software from gaining access to private networks connected to the Internet. A firewall may be implemented using hardware, software, or a combination of both.

[Lukedawn]

protect (a network or system) from unauthorized access with a firewall.

[Piyusha]

network security system that controls the network traffic

[Jay12]

designed to block unauthorized access

[muslimastro]

nice post by all. keep sharing

[muslimastro]

great post by all, thanks

[blackmagic]

thanks to show here Interest

[muslimastro]

impressive knowledge shared.

[BenSages]

A firewall is a network security system that monitors and controls all your incoming and outgoing network traffic based on advanced and a defined set of security rules.Using a single software firewall alongside a router or hardware firewall can strengthen network security without posing any compatibility problems. Using multiple software firewalls, however, will cause conflicts, hampering correct operation. Businesses highly concerned with network security can put together multiple hardware firewalls, minimizing any weaknesses in each, but this requires careful expert setup to avoid incompatibilities and blocking of legitimate data.

[vashimantra]

Great post by all, thanks

[Frantastic-ff]

a firewall is a set of relevant programs that allows restricting programs to run on your computer.

[manoharparakh]

It's very easy to get confuse with the word firewall with what it's not!

Firewall is an application or a device that follows a set of rule(s) to perform a routinely security checks to DENY, REJECT or ALLOW any matching incoming and or outgoing datagram from your end system(s).

If you have a Web Server, you would want to allow incoming and outgoing datagram or packet on port 80 which is http, as well as port 443 (secure web using SSL https) then block the rest request.

Mail Server want to open certain port for sending and receiving emails. Nothing else should be allowed.

[Cr.LiamSmith]

Firewall normally means a wall or partition that can impede or prevent fire spread. In machine form, firewall is a wall and a shield that prevents unauthorized access to a network or device through the outside.

Firewall is an intruders and hackers system that protects the network. It is a network security system that keeps an eye on the traffic going in and out and prevents and slows down viruses and malware and spreads them to each other.

For checking and filtering packets, Firewall uses defined rules, and terminology. The output and incoming firewall protection system filters and only makes traffic compatible with all the rules.

[juliaalan]

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.

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[jesica]

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. ... Firewalls can provide different levels of protection.

[Monisha]

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

[hoststud]

Firewall provides security from various attacks like Brute force, DDoS attack, backdoor and malware etc. It will make your server secure.
You can check this link to install firewall on your server: https://hoststud.com/resources/how-to-install-and-configure-csf-firewall.19/