When you hear the word firewall, you may not believe that there is only one type, but it is not. There are different types of firewalls, and luckily for you, this is what we intend to describe in this article. You see, we will describe each type of firewall found in the Windows operating system, but not only that, but we will also explain their major differences.
What is a Firewall?
To be clear, a firewall is a network security tool designed to monitor incoming and outgoing network traffic. Additionally, a firewall can enable and disable data packets based on defined security rules.
Different types of firewalls
We have included the following types of fire extinguishers available for Windows operating system with advantages and disadvantages:
- Stateful Inspection Firewall
- Stateless Firewall or Packet-filtering Firewall
- Application-Level Gateway Firewall
- Next Generation Firewall
Stateful Inspection Firewall
Not everyone has heard of the official firewall, but it is a reality. It is a type of firewall that keeps track of and monitors the status of any active network connection. It can also analyze incoming traffic and assess potential data risks.
From what we have collected, this type of firewall is available in Layer 3 and Layer 4 of the Open Systems Interconnection (OSI) model.
One of the functions that comes with a Stateful firewall is its ability to prevent malicious traffic from reaching or exiting a private network. In addition, it can monitor the entire network connection status and detect attempts to access an unauthorized network.
Advantages of Stateful Firewalls :
- Ability to prevent attacks
- Extensive logging capacity
- It will not open the width of the holes to allow traffic Communication status.
Disadvantage of the Stateful Firewall :
- It can be difficult to stop
- Cannot avoid application-level attacks
- Some protocols do not have country information
- Maintaining a provincial table requires additional overhead
Stateless Firewall or Packet-filtering Firewall
A Stateless firewall is also known as a Packet-filtering Firewall. What we have here is the oldest and most basic type of firewall currently available. Compared to others, this type of firewall works in line with the network cycle. It should be noted that firewalls like these are not router packs, but instead, will compare each received packet with a set of pre-defined rules.
Because it provides only basic protection, people can set it up to protect themselves from known threats, but it will not do good with unknown threats.
Advantages of Packet-filtering Firewall :
- It does not cost much to maintain it
- Processing of packages is done very quickly
- Filtering the total network traffic can be done with one device
Disadvantages Packet-filtering Firewall :
- In some cases, it may be difficult to repair and difficult to manage
- Cutting power is limited here
- When it comes to app crashes, it can’t be avoided
- It does not support user verification
- It cannot fully protect against all TCP / IP protocol attacks
Application-Level Gateway Firewall
An application-level firewall, or (ALG) for short, is a security proxy that provides network security. It is designed to filter the incoming node traffic to specific specifications, that is, the only data filtered here from the network transfer application.
For network applications that can work with ALG, some of which are File Transfer Protocol (FTP), Telnet, Real-Time Streaming Protocol (RTSP), and BitTorrent.
We must point out that ALG brings one of the highest levels of secure network communication. To illustrate this further, let us look at a simple example of how things work.
When a client moves and requests access to a network server through certain devices, the client will first connect to the hosting server, and from there, that proxy server will establish a connection with the main server.
Advantages of Application-Level Gateway Firewalls :
- Traffic entry was made easier
- Network performance is much better
- It is difficult to enable direct communication from outside a large network
- Supports temporary storage of content
Disadvantages of Application-Level Gateway Firewalls :
- Impact output power
- Influential apps
The Next Generation Firewall
The next generation firewall (NGFW). From what we have collected, this is a kind of deep-seated security package that can be expanded beyond port / protocol testing. Not only that, but it goes beyond blocking to submit an application level test, which comes to Layer 7.
As you can tell, this is a very advanced version of the standard fire protection system, but it offers the same benefits all around. However, unlike conventional security systems, NGFW uses both flexible and static packet filtering and VPN support in an effort to protect all incoming communication between network, internet, and security.
Advantages of next generation firewalls :
- It is much safer than the others here
- Login has more details
- Supports user authentication
- For app-level testing, this is supported up to Layer 7 of the OSI model
Disadvantages Next-Generation Firewalls :
- It will use more system resources compared to others
- The total cost is very expensive
- To limit negatives and false positives, further analysis is required.
Do firewalls stop viruses?
The firewall is not capable of protecting your computer system from viruses and malware. As mentioned above, the firewall is built to limit outside access to your network, thus making it harder for attackers to bypass it to gain access. At the end of the day, you will still need an antivirus program to protect your system from viruses and malware.
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