Questions IT and Development

What are the types of firewalls?

Airtract

Jane F. Wunsch

Always keep your head up

A firewall can be defined as the system which is specially designed for the prevention of unauthorized access in or out of any private network.  Implementation of the firewall can be done either in hardware or software format. If required it can also be used in combination of both hardware and software. Firewalls restrict the access of any unauthorized user in the private network which remains connected with the internet and to be a precise intranet.  There are different types of Firewalls which are there for the application. The major among them include the following five:

  1. Stateful Inspection firewalls
  2. Packet Filtering Firewalls
  3. Next-Gen Firewalls
  4. Circuit Level Gateways
  5. Application-level gateways also known as Proxy firewalls

To make its best application for your use, it is important for you to know the methods or process which makes it work. Aside to this, you also need to know about the best among them for the companies cybersecurity needs.

Packet Filter works within the network layer of the OSI model. It follows a set of rules for each packet and also depending on the outcome and then decides whether the packet will be forwarded or discarded. Proxy firewalls first verify user authenticity and then access the application gateway of the remote host as the user for the delivery of the packets.

Stateful Inspection firewalls act as a dynamic packet filter for keeping a track on the active connection and make use of the information to make the call on which packet to be delivered. Circuit Level Gateways serves the OSI model session layer. You can name it as the advanced level of the Application Gateway.  To get into the detail of the firewalls and its applications, you need to consult the professional experts having in-depth knowledge on this topic.

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