That’s because packet filtering technology is essentially just an access control list that decides to pass or prevent incoming data based solely on the packet’s IP address. You’ll often hear these types of firewalls referred to as “stateless”. While not suited to more advanced security threats, they remain a crucial element in early detection. The godfather of modern firewalls, packet filtering is still widely used today. For the sake of thoroughness, we cover all five. What Are the Different Types of Firewalls and Their Functions?ĭepending on who you ask, there are between three and five different types of firewalls in network security. By the end of it, you should have a general understanding of how they work, in addition to some of their pros and cons. In the next section, we take a brief tour of each of these. Application-Level Gateways (Proxy Server Firewalls).In order of ascending complexity, they are: Now that we understand the difference between these two categories, let’s discuss the various types of firewalls. To return to our airport analogy: If the initial metal detector is the hardware firewall, then the security guards posted throughout the terminals are the software firewalls. Not only does this provide more fine-grained protection, it has the secondary advantage of catching internal threats. While software firewalls don’t decide which data packets enter your intranet, they do have the power to prevent access to specific applications and ports once inside your network. So, what happens next? This is where software firewalls come into play. Of course, malicious packets can make it past this first physical layer of protection. As we’ll soon discover, there are many ways to do this. They decide which data packets are allowed into your intranet and which are turned away. Hardware firewalls are the first line of defense to protect your private network against incoming threats. Types of Firewalls: Hardware Firewalls vs. We’ll discuss the different types of firewalls, as well as some of their advantages and disadvantages.
In this article, we cover the basic things you need to know about firewalls when it comes to protecting your business.
Understanding which types of firewalls prevent which threats is critical you need the right tools for the job, after all. In the digital world, that vulnerable place is your private network and systems, while the insidious threat can be anything from a destructive virus to an internal hacker. Like a metal detector at an airport, firewalls work as an essential gatekeeper protecting a vulnerable place from an insidious threat.
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