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This article introduces the relevant knowledge of "what are the firewall software of linux". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Linux firewall software includes: 1, iptables;2, IPCop;3, Shorewall;4, pfSense;5, Untangle NG Firewall;6, UFW;7, IPFire;8, Smoothwall Express;9, VyOS and so on.

The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

To be a successful Linux system administrator, ensuring the security of your Linux system or network infrastructure plays an important role. In order to establish sound security management, you must use certain rules in the Linux firewall. This Linux firewall rule controls and manages incoming and outgoing network traffic and allows only legitimate connections between internal and external networks.

Therefore, the Linux firewall acts as a network security program that ultimately controls the connection and determines whether it is valid (unwanted intrusion). Although the Linux distribution provides default firewall protection through iptables, it is good to provide some additional options for system administrators.

Linux firewall software

In this review, I will share a common list of the best open source Linux firewall software and Linux distributions for firewall protection only. This list may help to choose the best according to the requirements.

1. Iptables

Iptables or Netfilter is the most popular and extremely fast Linux firewall based on open source CLI. Many system administrators prefer to use it for server protection because it is the first line of defense for Linux server protection.

Both IPv4 and IPv6 are protected with iptables and ip6tables accordingly. You can add, view, modify, or delete rules in a packet filtering rule set.

2.IPCop firewall

If you want to provide firewall security for your home or small office perimeter, then a police firewall is best for you. IPCop is an open source Linux firewall distribution that runs on older PC with fewer resources and acts as a secure VPN for network connections.

IPCop is a stable, user-friendly, secure and highly configurable Linux server firewall protection system. You can manage and set the rules of this Linux firewall through an intuitive, well-designed, and easy-to-use Web interface.

3. Shorewall--Iptables becomes simple

Shorewall or Shoreline is another popular free and open source Linux firewall. The firewall protector is based on the iptables/ipchains Netfilter system built into the Linux kernel. It also supports IPV6.

If you have difficulty using Iptables Firewall or setting up rules, you should try using Shorewall Firewall. It supports a wide range of gateways, routers, and firewall applications.

4. PfSense

PfSense is a free but powerful open source Linux firewall for FreeBSD servers. It provides many features that you can usually find in commercial firewall products. PfSense is based on the concept of stateful packet filtering.

After installation, a browser-based console will allow you to complete the firewall settings and provide you with the option to configure the network interface. It can be used as perimeter firewall protection for routers, DNS servers, and DHCP. In addition, you can use it as an VPN endpoint and wireless access point.

5.Untangle NG Firewall

Unlike any other Linux firewall, Untangle NG Firewall is a powerful Debian-based distribution that provides a unified platform where you can manage and control everything to protect your organization's network system. The firewall system is designed to save you time and money by freeing you from configuring network security options.

It has an intuitive and responsive browser-based user interface that allows you to easily and quickly create network setup rules. It is very powerful, with the comprehensive security of the gateway, next-generation filtering, in-depth insight analysis, better connectivity, performance and so on.

6. UFW-- simple firewall

UFW represents a simple firewall for managing and controlling Netfilter iptables firewalls. It is a command line firewall program for Ubuntu servers and Debian systems.

The main purpose of the firewall security software is to reduce the complexity of the iptables firewall using Gufw. GUI-gufw is very human, really simple, easy to use, and easy to integrate with applications.

7.IPFire

IPFire is one of the best open source Linux firewall software on the market. IPFire must provide extensive customization and flexibility and can be configured to be used as a firewall, proxy server, or VPN gateway.

This firewall security software is suitable for small Office, home Office (SOHO) environment. The built-in IDS-intrusion detection system is used to detect and block attacks, and the security system is developed as a stateful packet inspection (SPI) firewall.

8 、 Smoothwall Express

For new system administrators, it is always troublesome to ensure network security. As a novice, you may want a Linux firewall that is easy to use and provides a simple but compact user interface. In this case, Smoothwall Express will be best for you.

It is a free open source firewall solution that includes rock-solid security features for Linux server systems. Smoothwall express supports internal and external network firewall filtering, LAN, DMZ, insight traffic statistics, Web proxy for acceleration, and so on.

9.VyOS

VyOS is a completely free and open source network operating system based on Debian GNU/Linux. You can install it on any physical hardware or virtual machine using your own server or cloud platform. VyOS joins multiple applications, including ISC DHCPD, Quagga, StrongS/WAN, and OpenVPN, in a single management interface.

Unlike pfSense, VyOS supports advanced routing, such as dynamic routing protocols and command line interfaces. It can also be deployed as a virtual firewall and VPN endpoint protection.

10. Vuurmuur

Vuurmuur is another easy-to-use but powerful Linux firewall built on top of iptables. This network security manager allows you to control and manage the iptable rules of Linux servers without any prior iptable knowledge. It supports traffic shaping and gives you access to administrative permissions, such as real-time viewing of logs, connections, and system bandwidth usage.

11 、 Plesk

Plesk is a kind of firewall software that protects private networks by following some rules implemented in the firewall software. Users can customize the settings of the default rules or change the rules as needed. This Linux firewall software examines the traffic that accesses the network and determines whether it can pass through. Continuous monitoring by Plesk developers ensures the security of their customers.

12. Sophos XG

Sophos XG provides next-generation services as firewall software. It is used by medium-sized companies and enterprises with an easy-to-understand interface and easy to set up. This Linux firewall software is so smart that it can identify any threat that attempts to access the Internet immediately and immediately block vulnerabilities. According to eSecurity Planet, Sophos XG has prevented about 93.5% of threats since the start of the journey.

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