Compare the Top Firewall Software for Linux as of June 2025

What is Firewall Software for Linux?

Firewall software is a security tool that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Acting as a barrier between a trusted internal network and untrusted external networks, firewalls help prevent unauthorized access and protect against cyber threats. They work by analyzing data packets and determining whether they should be allowed through based on set policies, blocking potentially harmful traffic. Modern firewalls often incorporate advanced features like intrusion prevention, application filtering, and deep packet inspection to strengthen security further. By providing this critical layer of protection, firewall software safeguards sensitive data and ensures the integrity of networked systems. Compare and read user reviews of the best Firewall software for Linux currently available using the table below. This list is updated regularly.

  • 1
    Heimdal Endpoint Detection and Response (EDR)
    Heimdal® Endpoint Detection and Response is our proprietary multi-solution service providing unique prevention, threat-hunting, and remediation capabilities. It combines some of the most advanced threat-hunting technologies: - Next-Gen Antivirus - Privileged Access Management - Application Control - Ransomware Encryption Protection - Patch & Asset Management - Email Security - Remote Desktop - Threat Prevention ( DNS based ) - Threat Hunting & Action Center With 9 modules working together seamlessly under one convenient roof, all within one agent and one platform, Heimdal Endpoint Detection and Response grants you access to all the essential cybersecurity layers your business needs to protect itself against both known and unknown online and insider threats. Our state-of-the-art product empowers you to quickly and effortlessly respond to sophisticated malware with stunning accuracy, protecting your digital assets and your reputation in the process as well.
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    Starting Price: $0/month
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  • 2
    ThreatLocker

    ThreatLocker

    ThreatLocker

    The ThreatLocker suite of security tools are powerful and designed so that everyone from businesses to government agencies to academic institutions can directly control exactly what applications run on their networks. We envision a future in which all organizations can chart their own course free from the influence of cybercriminals and the damage their incursions cause, and our team of veteran cybersecurity professionals created ThreatLocker to make this vision a reality. The team at ThreatLocker has been developing cybersecurity tools for decades, including programs to enhance email and content security, and this is our most innovative and ambitious cybersecurity solution yet. We developed this unique cybersecurity system because we believe that organizations should have complete control of their networks and should not have to live in fear of the next malware attack. To learn more, visit ThreatLocker.com.
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  • 3
    Imunify360

    Imunify360

    CloudLinux, Inc.

    Imunify360 is a security solution for web-hosting servers. Imunify360 goes beyond antivirus and WAF and is a combination of an Intrusion Prevention and Detection system, a Application Specific Web Application Firewall, Real-time Antivirus protection, a Network Firewall, and Patch Management components in one security suite. Imunify360 is a fully-automated solution and it collects all statistics under an intuitive dashboard.
    Starting Price: $12
  • 4
    Linode

    Linode

    Linode

    Simplify your cloud infrastructure with our Linux virtual machines and robust set of tools to develop, deploy, and scale your modern applications faster and easier. Linode believes that in order to accelerate innovation in the cloud, virtual computing must be more accessible, affordable, and simple. Our infrastructure-as-a-service platform is deployed across 11 global markets from our data centers around the world and is supported by our Next Generation Network, advanced APIs, comprehensive services, and vast library of educational resources. Linode products, services, and people enable developers and businesses to build, deploy, and scale applications more easily and cost-effectively in the cloud.
    Starting Price: $5 per month
  • 5
    CrowdSec

    CrowdSec

    CrowdSec

    CrowdSec is a free, open-source and collaborative IPS to analyze behaviors, respond to attacks & share signals across the community, outnumbering cybercriminals all together. Set up your own intrusion detection system. Apply behavior scenarios to identify cyber threats. Share and benefit from a crowdsourced and curated cyber threat intelligence system. Define the type of remediation you want to apply and where. Leverage the community’s IP blocklist and automate your security. CrowdSec is designed to run seamlessly on virtual machines, bare-metal servers, containers or to be called directly from your code with our API. Our strength comes from our cybersecurity community that is burning cybercriminals’ anonymity. By sharing IP addresses that aggressed you, you help us curate and redistribute a qualified IP blocklist to protect everyone. CrowdSec is 60x faster than tools like Fail2ban and can parse massive amounts of logs in no time.
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