8 Types of Firewalls You Need to Understand

8 Types of Firewalls You Need to Understand

In this digital era, cyber security has become an important aspect for individuals and companies. Cyber threats such as malware, phishing, and ransomware continue to lurk, and are ready to pounce on security gaps that can cause major losses. With increasingly rapid technological developments, the existence of firewalls has become increasingly vital to protect data and information from cyber attacks. However, there are types of firewalls that you need to understand to find the right security system.

On this occasion, we will explain thoroughly about firewalls. Starting from the definition, function, types, and tips for choosing the right firewall. Without further ado, read the article below to the end!

What is Firewall

A firewall is a system or software designed to control data traffic entering and leaving a computer network. The main purpose of a firewall is to protect computer networks and systems from unauthorized access and cyber attacks. In simple terms, a firewall can be thought of as a digital fortress that stands firmly between your internal network and the outside world.

Functions of Firewall

Firewalls have several main functions that are very important in maintaining the security of computer systems and computer networks. These functions work in an integrated manner to provide comprehensive protection against potentially detrimental cyber threats. Following are the main functions of a firewall.

1. Prevent Unauthorized Access

One of the main functions of a firewall is to prevent unauthorized access to a network or computer system. Firewalls do this by monitoring all data traffic entering and leaving the network, and then blocking unqualified access based on predefined rules.

2. Detection and Filtering

Apart from preventing unauthorized access, firewalls also function to detect and filter potential threats that may exist in data traffic. This includes detection of malware, viruses, DDoS attacks, and other attacks that can compromise network security. Firewalls use various methods and algorithms to analyze data traffic and identify suspicious patterns

Read Also: 11 Common Cybercrime Examples in Indonesia

3. Access Setting

Firewalls allow administrators to manage access to network and computer resources in detail. This means administrators can determine who is allowed to access a particular network or resource, either individually or by user group. With proper access settings, administrators can control the level of network security according to company policies and needs.

4. Logging and Monitoring

Another function of a firewall is to record data traffic activity and provide reports to administrators. This allows administrators to actively monitor network activity and perform in-depth security analysis. Logged information can include details about incoming and outgoing data traffic, failed access attempts, as well as warnings about potential threats detected. Through this information, administrators can quickly respond to and address potential security threats.

Types of Firewall

There are several types of firewalls that are commonly used, each with different characteristics and ways of working. Here are several types of firewalls that need to be understood.

1. Packet Filtering Firewall

Packet filtering firewalls work at the OSI Layer 3 (Network Layer) and Layer 4 (Transport Layer) network levels. This firewall inspects data packets that pass through the data exchange point (gateway) based on predetermined rules. These rules include information such as IP addresses, ports, and protocols.

This firewall tends to be simpler and is suitable for small networks because of its high performance. However, its weakness lies in its limitations in detecting more sophisticated attacks.

2. Stateful Inspection Firewall

Stateful inspection firewalls or also known as session-based firewalls offer a higher level of security than packet filtering firewalls. This firewall not only analyzes data packet headers, but also checks the connection status thoroughly by considering the context of the connection session so that the stateful inspection firewall can block suspicious activity. Even though they are more sophisticated, managing and configuring stateful inspection firewalls tends to be more complex.

3. Proxy Firewall

A firewall proxy acts as an intermediary between the internal device and the internet. All internet access requests must pass through a firewall proxy, allowing for tighter control and monitoring. This firewall provides a high level of security by hiding the internal IP address from external sources. However, its high complexity and slow performance make it less suitable for environments requiring high throughput.

4. Next Generation Firewall (NGFW)

NGFW combines traditional firewall features with advanced security technologies such as Intrusion Prevention System (IPS) and application control. This enables NGFW to detect and block various types of attacks, including zero-day malware and application-based attacks. NGFWs offer comprehensive security and granular control over application traffic, but come with high costs and complexity.

5. Cloud Firewall

As the name suggests, cloud firewalls are hosted and managed by cloud service providers. It offers high scalability and flexibility making it ideal for companies that are dynamic and have multiple locations.

Cloud firewalls allow users to easily set up and monitor computer network security from anywhere with an internet connection, but data security may depend on cloud services and costs may vary depending on usage.

6. Hardware Firewall

Firewall hardware is a physical device that stands apart from a computer or other device and has a shape like a router. This firewall provides superior protection for the entire internal network with high performance and strong security. However, cost and complexity of management as well as lack of flexibility are the main obstacles to this solution.

7. Software Firewalls

Software firewalls are programs installed on an individual’s computer or device to protect the device from unauthorized internet access. These firewalls provide simple protection for individual devices at low cost and ease of use, however, they have lower security and limitations in protecting entire computer networks.

8. Circuit-Level Gateways

Circuit-level gateways work at Layer 4 (Transport Layer) of the OSI model and analyze data traffic based on connection sessions. This allows the firewall to provide tighter control over traffic and detect DoS attacks. However, its high complexity and large overhead make it less suitable for environments with high throughput requirements.

Read Also: 15 Ways to Maintain Computer Network Security in Your Company

Tips for Choosing the Right Firewall

Choosing the right firewall for your company’s security needs is a crucial decision. Before making a decision, there are several factors that need to be considered carefully. Here are tips you can follow to find the right firewall.

1. Know the Level of Security Needs

First of all, understand the types of threats you may face and how sensitive the data will be protected. If your company operates in an industry that is highly exposed to risk such as finance or health, then you need a high level of security. In this case, firewalls that offer advanced features such as Intrusion Prevention System (IPS), deep packet inspection, and protection against DDoS attacks are more suitable for use.

2. Network Size and Complexity

The size and complexity of the network also influences the choice of the right firewall. If your network is relatively small with few access points, a software-based firewall may be a good choice because it is easier to implement and manage. However, for larger, more complex networks, it may be more appropriate to consider a cloud-based or scalable firewall solution.

3. Available Budget

Budget is also an important factor in choosing the right firewall. Firewalls have a wide price range depending on the features offered and the brand chosen. It is important to conduct a cost benefit evaluation and ensure that the investment in a firewall is in line with your company’s needs and financial capabilities.

4. Technical Expertise

The ability to manage and configure firewalls also needs to be considered. If your company has an IT team that is skilled and experienced in network security, then choosing a firewall that is more complex and requires more detailed configuration is a wise choice.

However, if your company has limited technical expertise, then choosing a firewall that is easier to implement and manage can reduce the risk of misconfiguration and system misuse.

That is a comprehensive explanation of firewalls. After reading the article above, of course you now understand the types of firewalls and know how to choose them correctly. However, understanding alone is not enough. It’s important to take concrete steps to improve the security of your IT infrastructure.

To easily create a secure and customized infrastructure, and ensure business continuity, use Cloud Services from AdIns. We can help to build and manage a secure and reliable IT infrastructure without having to worry about technical complexity.

Our cloud services can protect sensitive data from cyber attacks and ensure that businesses can keep running smoothly even in emergency situations such as natural disasters or system failures due to the disaster recovery system features included in our cloud services. Don’t let security become an obstacle to business growth and success You. Contact us now to get started on your path to continued security and success. Request a demo here!

types of firewalls, 8 Types of Firewalls You Need to Understand, Advance Innovations

Author :

Ad Ins

Published date :

16 May 2024