Cyber Security Firewall

Cyber security is the process of digitally protecting hardware and software and preventing online threats. Cyberworld, or cyberspace, is a market for all networked devices and entities using the Internet, which is also called the World Wide Web. A Cyber Security Firewall is a network security system that can be hardware or software. It’s used to protect the trusted network against unauthorized access to external networks. Large organizations define a trusted network or a defined private workplace with the resources they need to exhibit to the outside world or public networks for a specific purpose. All their applications and systems are published on the Internet or in a general location within the defined scope of the organization's trusted network.

What is Cyber Security?

Cyber security is the process of protecting networks and systems from digital malicious activities. Cyberattacks usually work to acquire, change, or delete important information, steal users’ money, or disrupt usual business operations. Implementing effective cyber security measures is incredibly challenging today because devices used by people are more than the users themselves. Another reason is how the attackers are becoming increasingly innovative. This is also referred to as “information technology security” or “electronic information security.”

Cyber security focuses on protecting computer systems from unauthorized access, damage, and inaccessibility. It is indeed the safeguard of the world wide web system as well as applications from cyberattacks, including electronics, operating systems, and data. Businesses and individuals are using the practice to improve the security of computer and network management systems.

To be considered secure, data, systems, and programs, as well as other relevant data, must be protected from unauthorized or unaccompanied direct connections. The loss of important data should also be prevented. Due to various safety risks posed by cyberattacks and other digital threats in today's world, cyber security has always been critical.

Numerous organizations produce firewall software to protect their confidential information.

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What is a Firewall?

A firewall is one of the best solutions for protecting digital platforms by creating a barrier between trusted and untrusted networks. It’s located on the perimeter of the organization's internal trusted network, where the user accesses the application. It’s mostly used by organizations that are always looking for better ways to protect applications from unwarranted threats.

  • A firewall is an element of an application or system software that provides secure access to the network. It examines both outgoing and inbound traffic and uses a set of guidelines to detect and prevent dangers.
  • Firewalls have been utilized in both personal and professional configurations, and several machines, which include Mac, Windows, and Linux computer systems, have one established. They have been widely regarded as an important element of information security.
  • Firewalls have been employed in both business and home settings. In addition to other information security machines, modern companies implement them into an information and event security management (SIEM) strategic plan. They can be managed to install at a company's network boundary to protect against foreign threats, or they may be implemented inside the system to form categorization as well as protect against insider malware attacks.

How do Firewalls Work?

Firewalls scan packets and bags and create 'choke points' to channel web traffic, which is then examined over a set of programmed parameters and processed accordingly. Some firewalls also track traffic and connections in the audit logs to refer to what was authorized or blocked.

These are commonly used to secure the perimeter of a private network or its host devices. As a result, firewalls are a security tool within the larger category of user access control. These gates are generally installed in two places: on dedicated computers on the network, user computers, and other terminals themselves (hosts).

Firewalls examine data packets for malicious software and perhaps even possible malware attacks that have already been previously recognized as current threats. If a data packet is blacklisted as potentially dangerous, the firewall can block it from accessing the network and perhaps even attempting to reach your computer system.

It primarily works by distinguishing the positive from the negative, or perhaps the trustworthy from the untrustworthy. Moreover, before actually looking deeper into the specifics, it is beneficial to comprehend the configuration of web-based network systems.

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Types of Hardware Firewalls

1. Packet filtering

A packet-filtering firewall is a network security function that controls the flow of inbound and outbound network data. The firewall examines every package, including user data and control information, and tests them according to predetermined rules.

2. Proxy service

Proxy service is an intermediary role played by a dedicated software or computer system between a terminal and a customer requesting the service. The proxy service can exist on the same computer or on a separate server.

3. Stateful Multilayer Inspection (SMLI) Firewall

The Multilayer Inspection Firewall (SMLI) uses a sophisticated form of filtering that examines the seven layers of the Open System Interconnection (OSI) model. Each package is analyzed and compared to the known status of the friendliest packages.

4. Circuit-level Gateway

A circuit-level gateway is a type of firewall. Circuit-level gateways function at the session layer of the OSI model, or as a "correction layer" between the application layer and the transport layer of the TCP/IP stack. They watch TCP handshakes between packets to see if a requested session is legitimate.

5. Next-Generation Firewall (NGFW)

A new generation firewall is part of the 3rd generation firewall technology, combining a traditional firewall with another network device. It filters functions such as an application firewall using an in-depth inspection of online packages, and an intrusion prevention system.

Advantages of Firewall:

1. Give Protection Against Harmful Elements

It improves the security and confidentiality of vulnerable services. It prohibits unauthorized users from accessing a private network connected to the Internet. With hundreds of thousands of new threats being developed each day, it is essential that you put defenses in place to keep your systems healthy.

One of the most noticeable advantages of firewalls is their ability to control your system's entry points and stop virus attacks. The cost of damage caused by a virus attack on your plans could be unacceptably high, depending on the type of virus.

2. Installation Process is Relatively Easy

A firewall is designed to restrict Internet access to a computer with an Internet connection, primarily to prevent non-invited customers from entering or exiting the pattern. The firewall, which blocks the holes left open on the Internet, was originally conceived.

Setting up a firewall can become a daunting task because of its technical nature. Dividing up the work into more straightforward tasks can help manage it.

3. Keep Analyzing Traffic

The data flow across networks creates ways for many threats that are still detrimental to your business. Therefore, to protect your system against these, this solution tracks the traffic of the entry and exit of data into the systems. This is done by using predetermined rules and filters.

A professional tech team in any company can handle different protection levels depending on the data type entering and exiting the firewall.

4. It Helps in Maintaining High-Level Privacy

Firewalls help promote confidence by working proactively to protect user data. This creates a trusted environment for customers.

In addition, the improvement of data protection systems at a higher level may constitute a competitive advantage and become a selling point for customers.

5. Stop Attacks by Hackers

Today's world mostly works based on data, which makes it more prone to various malicious system attacks that have resulted in network users being robbed of data. Firewalls should be installed in networks to protect them from spyware (malware) attacks. It provides a significant barrier to these fraudulent activities.

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Disadvantages of Firewall:

1. Cost Oriented

Firewalls and their cost to install in network systems depend on their type. Typically, hardware firewalls cost more than software firewalls because of their installation and configuration demands on network systems. For this, professional IT expert support is needed. These prove that the installation and maintenance of these firewalls are a costly affair. However, software firewalls are easy to install even for a beginner.

2. Can Obstruct Some Organizational Activities

Firewalls undoubtedly protect the user's system from unauthorized access to the network. In reality, firewalls are useful for the average user, but in the case of a big enterprise, they are sometimes annoying.

3. It Can Decrease the Performance Level

The overall efficiency of an IT system is limited by the performance and utility of software firewalls. We know that a computer's processing ability and random access memory are vital to delivering good performance. While the firewall works at the back of the network, it generates more processing energy and resources. As a result, the efficiency of the IT system is impacted.

4. Still, Some Hacking Attacks Can Happen

Firewalls help block even the basic Trojan horses from harming the system but they fail to hold any other malware from getting into the system as reliable data. To manage this kind of problem, malware needs an anti-malware program installed alongside.

5. Need A Careful Maintenance

For small companies, the costs of maintaining the firewall are easy to cover, but it’s not the same for large firms. Distinct personnel are needed to use the firewall and ensure that it’s used in the best way possible to keep intruders away from the network. This adds to the organization’s expensive expenses.


According to its functionality, each commercial service or application displayed on the Internet will have its security requirements. A detailed safety and feasibility analysis shall be carried out before implementing the most appropriate safety control systems. To defeat the world of threats and hackers, the emphasis must be on implementation and then continual improvisation to respond to all current and possible future threats.

To control these external threats, firewalls are one of many solutions available in today's global cyber security. Depending on its features, each commercial service or application exposed to the Internet will have its security requirements. To establish the most appropriate safety control systems, a detailed analysis, and feasibility study must be carried out.

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As a content writer at HKR trainings, I deliver content on various technologies. I hold my graduation degree in Information technology. I am passionate about helping people understand technology-related content through my easily digestible content. My writings include Data Science, Machine Learning, Artificial Intelligence, Python, Salesforce, Servicenow and etc.

Firewalls are security devices—hardware or computer software. It can help protect your network by filtering traffic and blocking aliens from getting unauthorized access to private information on your computer. Not only does a firewall block unintended traffic, but it can also help block malware from infecting your computer. Firewalls may offer various levels of protection. The key is to determine the degree of protection needed.

Multi-layer firewalls operate as packet-scanning firewalls in that they filter incoming data before it enters the network. The difference is that multi-layer firewalls use what is called "dynamic packet filtering," which implies monitoring active network connections.

Cyber security factors influence the implementation of policies that protect networks and information management systems. It also compels businesses and organizations to protect their networks and confidential data from cyberattacks such as viruses, malware, Trojan horses, spam, denial-of-service (DOS) attacks, and possibly even unauthorized access.

CISA acts as the federal cyber security team's wide receiver, safeguarding and protecting the home zone national civil government channels in close collaboration with the business administration, which is in charge of overall governmental cyber defense.

Because firewalls frequently use networking devices that are extremely slow in comparison to the internet, to which they are connected, incorporating a firewall into your network infrastructure may result in significant slowdowns when traffic peaks occur.

Firewalls can also help prevent malicious programs from gaining access to a system and possibly even a connection via the internet. Firewalls can indeed be set to prevent information from specific places, software, and perhaps even ports while also enabling necessary and pertinent information to pass through.

A VPN firewall is another type of secure network that is specifically designed to prevent both unauthorized and malicious viewers from obstructing and attempting to exploit a VPN provider. A VPN makes it possible to safely interact with restricted web pages, whereas a firewall could only establish the surface of limitations that have been accessed. Firewalls use your preferences to restrict access to specific websites. A VPN allows you to browse the very same website over and over again.