Safety and protection are something that is a prerequisite for every individual. We all are concerned for the safety of our devices but do we realize what exactly we are saving our devices from? These can be error defaults or even harmful files that might be a result of accessing inappropriate and miscellaneous files and sites from the internet. In such situations, a Firewall is something that would protect us from such situations as it is particularly designed for that purpose. Did you know there are different types of firewalls. People often tend to confuse this with what are the two main types of firewall. This article will introduce you to the different type of firewalls and provide you with information about their prevalence.

What is a Firewall?What is a Firewall?

A Firewall is a security service provider which monitors the network and all the activities running on your network. These are designed to protect from any external harm. It resists unwanted and harmful traffic and would only allow a selected amount of traffic to pass which is adequate according to the cyber security rules.

Features and Components of Firewall 

Being a security-oriented device Firewall comprises the following features and components:

  • Advanced Authentication 

A Firewall consists of the feature of Advanced Authentication as it has a vital role to play in the process of protecting your data and device from such corruption. This feature is something that a Firewall must possess to be more secure for the user.

  • Network Policy 

These are a few policies in which the Firewall provides a set of rules on which the acceptance and denial of sites are permitted for the network. These run on two levels. Higher level Network policy and lower level network policy. These will allow the Firewall to set up limits for the allowance of traffic on your site.

  • Application Gateways 

To tighten up the security and not have a loose thread, a firewall has application gateways that provide the service of filtering services and connections.

  • Packet Filtering 

Packet Filtering is something done with the help of a packet-filtering router. This feature allows the router to filter the IP packets as they pass through them.

Advantages of Having a Firewall 

  • It blocks the spyware 
  • Saves you from the attacks of Virus 
  • Protects your security and privacy 
  • Monitoring network traffic 
  • Prevents the chances of hacking

Different Kinds of Firewalls Available

types of firewalls

A firewall is something that works on everyone’s device but we are often unaware of its existence. Here are different type of firewalls that are explained in detail to make you understand those different type of firewalls most easily.

  • Packet Filtering Firewall 

This is the type of firewalls that works along devices such as routers and switches. It is an extremely fast Firewall that allows you to scan traffic without affecting your device performance. It is a low-cost type of firewalls that provides a basic level of security to your device.

  • Application Level Gateway

    Application Level Gateway

Among all the different types of firewalls, this type of firewall is something that works from the entry and exit points of the network. It will filter your packets according to the characteristics like HTTP request string and destination port. It examines all sorts of communication between the device and the sources. Allows the user to control fine-grained security.

  • Circuit-level Gateway circuit Level Gateway 

This type of firewall is a quick-working firewall that detects malicious content and other protocol sessions between the local and remote hosts. Through this, they figure out if the process is trustworthy or not. It is very easy to access and also comes with a lost cost.

  • Next-Generation Firewall Next-Generation Firewall 

In all the different types of firewalls, this runs a deep inspection and uses DPI, IDS, and IPS for their work. It does not use the protocol header of the packet to run its feature, rather it looks into the actual data that the packet is carrying. This is one of the main types of firewalls as it provides its users with the best level of filtering. The features like an automatic update to provide current context and accurate tracking of traffic makes it stand out from the rest.

  • Stateful Inspection Firewall 

The last but not least type of firewall is the stateful inspection firewall which provides a multilayer inspection firewall. The process of monitoring the sessions of your connection provides you with a high degree of control over what you should access by your network.

These were the 5 major types of firewalls discussed in detail for your understanding. All of them have different features and different performances but all act for a single purpose which is protection. From all these different kinds of firewalls, you can use any one of them or layer your device with multiple as per your needs.


The Final Say 

The given article is curated for all those people who are looking for a guide to know about Firewalls and different type of firewalls. Although the classification of firewalls may appear never-ending it is very easily explained in the above-mentioned data. You will find available firewall types here along with their specifications. Any query related to firewalls would be easily solved if you go through the article in depth. This would bring you all the necessary details about the type of firewalls directly on your screens.


Q1. What is the main firewall?

There is no particular thing as the main firewall but if there is an Application level gateway firewall is one of the most prominent firewalls and also the most effective type of firewall.

Q2. What are the 3 types of firewalls?

Although there are many types of firewalls that exist the 3 types of classified  firewalls are :

  • Software firewall 
  • Hardware firewall 
  • Software and Hardware firewall

Q3. What are the 4 major types of firewalls?

The four major types of firewalls are:

  • Packet Filtering Firewall 
  • Circuit Level Gateways 
  • Stateful Inspection Firewall 
  • Application Level Gateway