Top 7 Free and Open-Source Security Tools

Security tools are required by everyone. Every system, user, organization, company, start-ups, institutes – each requires security tools to safeguard their operating systems and network from malware and spyware. Hacking has become an adventure for software and computer scientists. Breaking through the protective firewalls and breaching one’s privacy has become a sport for the developers. From renowned government organizations to computer/software engineering students, each is trying to learn and explore ways to sweep into one's personal life and fetch unauthorized information. Therefore, in such times, the role of efficient security tools is highly required and necessary.

Here at LinuxAPT, as part of our Server Management Services, we regularly help our Customers to perform related Linux System Security queries.

In this context, we shall look into the best and highly recommended security tools for Linux that are also compatible with some of the other leading operating systems as well.


The Malware Information Sharing Platform is also known as MISP is a security and threat detection platform that stores, shares, and connects economic racket information, threat intelligence, susceptibility information, and counter-violence information indicators to alarm its users. The free and open-source software comes with the AGPL (Affero General Public License). This Linux security tool seamlessly collaborates, stores, and shares malware detection information, cyber safety signs and utilizes the information and the IoCs to detect and counteract threats.

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2. Privacy Badger

Developed by Electronic Frontier Foundation (EFF) in 2014, Privacy Badger is a free and open-source security tool that comes as a browser extension. Privacy Badger extension can be installed on all the leading browsers, i.e., Mozilla Firefox, Google Chrome, Opera, and Android. The privacy safeguard for the browsers ensures and provides security against the website visitor trackers who are prone to gathering browser information. The trackers gather and share this collected information with third parties via creating fake browser profiles. Though, this enhanced security tool hinders such action and disable trackers to gather browser information via disabling WebRTC that discloses the IP addresses.

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3. Clam Antivirus

Clam Antivirus, also known as, ClamAV, is free, open-source and a cross-platform compatible security tool is one of the best security tool options for the Linux and rest of the leading platform’s users. The security tool works as a commendable middleware that seamlessly detects trojans and viruses along with any other privacy and security threats. ClamAV includes and provides its users with a list of utilities that includes an automatic database updater, command-line scanner, scalable multi-threaded daemon, running on an anti-virus engine from a shared library, etc. One of the extended uses also includes the platform's ability to provide a solution for mail gateway scanning software that enhances software expertise and user experience as well.

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One of the most incredible security tools offered, AIRCRACK-NG is a network application suite entailing a packet sniffer, detector, WPA/WPA2-PSK, and WEP analysis and cracker compatible with the 802.11 wireless LANs. AIRCRACK-NG security tool seamlessly nose 802.11a, 802.11b, and 802.11g traffic for the wireless network interface controller. The security tool’s packet allows additional processing of the third tool by capturing and exporting data to the text files. Via packet injection, AIRCRACK-NG is able to replay counterfeit access points, attacks, de-authentication, etc. The enhanced security tool also supports the raw observing mode and provides the ability to crack WEP and WPA PSK enhancing the platform’s reliability in terms of providing efficient security to its users.

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5. Wireshark

Wireshark is another free, open-source, and cross-platform compatible security tool. Out there since 1998, the software is deemed commendable for providing network troubleshooting, analysis, communications protocol development, software, and education services to its users. The Wireshark provides data capturing features that understand the structure of a network, these features include the platform’s ability to capture data from a live network connection or read from an already-captured packets file, captured data of a network can be browsed via command-line utility or a GUI, ability to read the live data from Ethernet, IEEE 802.11, PPP, and loopback, etc., advanced plug-ins for new protocol integrations, and the list goes on.

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6. Archery

Archery is a free and open-source security tool that works best on the leading operating systems including Linux. The security software helps to detect the vulnerabilities, threats, and potential risks that occur in one’s operating system. The software provides an efficient mechanism of first scanning the potential threats and then displaying them in a web interface. The platform offers numerous functionalities such as the ability to interact with the distinguished susceptibility scanners of other applications, security detection of CD/CI setting thereby enabling DevOps teams, ability to assess and find threats in the infrastructure, provides dashboards, reporting, and searching facilities.

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7. Anchore

Anchore is an open-source security tool for Linux. The tool helps to detect, assessing, and authenticating the container images. The platform also allows the users the ability to save the images in the cloud or the on-premises servers. Capable of interacting and managing security concerns of the container images, the tool is mostly used and accessed by the developers. Anchore offers a free version in which the users can access a list of enhanced features such as support for Java, Python, Node, NPM, CVE scanning, Docker file checks, credential scanning, allow list and deny list, malware scanning, best-effort feed service, CI/CD Integration enabling the DevOps, Kubernetes Admission Controller and community help.

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This article covers the best open source security tools for Linux and other leading platforms such as MISP, Privacy Badger, Clam Antivirus, AIRCRACK-NG, Wireshark, Archery, and Anchore. Basically, these security tool comes with extraordinary security features that ensure network and operating system’s reliability and provides an insight into the vulnerability state.

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