What is a Firewall and What’s Its Purpose?

What is a Firewall and What’s Its Purpose?:

Whether on your system or in crime plays with a cyber security element, you have undoubtedly heard the term “firewall”. Your firewall is an important part of your computer’s security and helps keep out unwanted connections, potential hackers, and more.

There are different types of firewalls and network security. To understand how to best protect your personal data, you first need to know what a firewall is and its purpose.

What is a firewall?

Firewalls are named for the interior walls found in many interconnected houses that prevent fires from moving from one house to another. In the same way, your computer’s firewall monitors your network’s traffic and Blocks unauthorized connections.

The term first appeared in the 1983 film war games, Before it was ever used in real computing. Although it is not clear when the term was officially used for the first time, it is easy to see the development of the term.

In the late 80s, network security routers could filter information as an early form of network security. Since that time, several types of firewalls have appeared, each serving a different purpose in relation to cyber security.

Types of firewalls

There are essentially six different types of firewalls. All firewalls are either software based or Hardware based firewall. Most of the types mentioned below basically depend on how firewall rules and features work, either in software or in hardware.

Virtual firewall

A virtual firewall is also known as a cloud firewall. This is a type of network protection that is used in a “virtual” environment, such as within a cloud or virtualized machine. These firewalls function largely like hardware firewalls, but they can be more well adapted to fit the application.

A virtual firewall can be highly application-specific, in that it can work for a specific application and nothing else. In other uses, it can protect the cloud environment from unauthorized traffic. For example, a service like Dropbox or iCloud would use a virtual firewall to protect against intrusion.

Proxy firewall

A proxy firewall is an earlier, more primitive type of firewall that lacks the more advanced features of more modern network security solutions. In most cases, a proxy firewall protects traffic between point A and point B with the original filter.

A proxy firewall will monitor both incoming and outgoing traffic and block any connections that are not allowed. In more technical terms, a proxy firewall blocks connections at the application layer instead of at the network or transport layer.

Integrated Threat Management Firewall

An integrated threat management firewall, or a UTM firewall, combines firewall functionality with antivirus software. UTM firewalls provide more protection than just monitors for unauthorized traffic and a variety of different threats.

UTM firewalls can monitor email-based attacks as well as threats posed by remote tasks. Despite this, UTM firewalls are designed to be easy to use with more simple control schemes.

Next generation firewall

The next generation firewall, or NGFW, is a more advanced and powerful type of firewall. Where a standard firewall can primarily focus on packet filtering, an NGFW combines that technology with advanced intrusion detection and other features to provide the next level of security.

In some cases, NGFWs use artificial intelligence to provide better network security. This allows them to provide significantly higher levels of security, but this type of firewall is used more often in corporate environments with large networks and databases.

Threat-Focused NGFW

If an NGFW is a more advanced firewall, then a threat-focused NGFW is the most advanced option. There is a widespread awareness of the network to know where the biggest threats lie, and it can respond to potential attacks, thanks to intelligent security automation.

Stateful inspection firewall

A stateful inspection firewall is the standard type of firewall found on most modern systems and intercepts traffic based on the “state” of a connection. This is known as “stateful packet inspection” or “dynamic packet filtering”.

In other words, a stateful inspection firewall only allows authorized traffic with the correct state to pass through and block all other connections. It also monitors threats based on port and protocol type.

Do you need a firewall?

In the early days of the Internet, it was not uncommon for users to install Their own personal firewall As an additional layer of protection against online threats. However, those days are long gone now – not because of the lack of threats, but because firewalls are readily available.

Both Windows and MacOS operating systems provide built-in firewalls that provide tremendous security. On top of that, most wireless routers also provide another layer of security in the form of network address translation.

Even with a firewall built through your operating system, your computer may still be vulnerable to public networks. If you connect to airport Wi-Fi or jump on a public network in a coffee shop, you only need a firewall to stop someone with a packet sniffer.

If you regularly use unsecured Wi-Fi networks, consider investing virtual Private Network, Or VPN – encrypts your information and protects it from prickly eyes. This is the only secure way to access banking information or sensitive data while on a public network.

You can install one Third-party firewall For additional security on your system, but this is not strictly necessary. However, if you want to make sure that your system is safe, then we have a list of Best firewall for windows 10 That Not doing Windows Defender, the default firewall software.

The topic of firewalls is heavily linked to network security and can quickly become a highly technical topic, but the main thing is: firewalls are important, but you probably already have multiple firewalls through your OS and your network router. have access. Just remember if you Choose to disable your OS firewall For any reason (like updates or patches), turn it back on after finishing.