How are auditd and Lynis different?

Differences between auditd and Lynis Recently I received the question what the difference is between auditd and Lynis. Both focus on auditing, that part is clear. For someone not familiar with both software tools, the technical differences may not directly be obvious. Time to write about that, for everyone that has the same question. Comparing functionality Let’s start with a quick introduction in both tools. Audit daemon AuditdĀ is the daemon process in the Linux Audit Framework, written and maintained by […]

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The Non-Technical Changelog: Insights of 6 Months Development

The Non-Technical Changelog Lessons learned between our last and current release The Lynis project team is proud to announce a new release of our security auditing tool. With months of work and a variety of changes, we bumped up the version to a “zero release” (2.2.0). The technical changelog is included in the download. We consider it to be a stable release, yet ask all to test it first. Being the original author of Lynis, there is an additional background […]

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Viewing available test categories in Lynis

Last updated on April 1st, 2015Test categories in Lynis When auditing a server, it may be useful to only run a particular category of tests, like firewall related tests. In that case the –tests-category parameter can be used, together with the category name. Available categories To determine what categories are available, Lynis has a built-in parameter –view-categories which lists all available files. Most of the names are self-explanatory on what of tests they include. For more information about the included […]

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What’s New in Lynis 2: Features

Last updated on May 27th, 2018Lynis 2.x Features Lynis 2.x will bring security auditing of Linux and Unix systems to a new level. In this blog post we share some exciting new features. Release of Lynis 2 is planned for February 2015. Overview: History Lynis 2.x Plugins Systemd Support File Integrity Monitoring Containers & Virtualization Operating Systems Focus on Simplicity Free and Commercial Support   History Lynis has been created in 2007, as a follow-up on the well-known tool Rootkit […]

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Product comparison: Lynis VS Nessus

Last updated on May 27th, 2018Lynis VS Nessus Comparison of both products Professionals ask us often how Lynis is different than Tenable Nessus. As the original author of Lynis, let me address that very interesting question.   Different goal Nessus is focused on vulnerability scanning, or in other words, finding weaknesses in you environment. The huge amount of plugins and their actions show that this is the primary focus. Along the way it started to implement others services, like compliance […]

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Alternatives to Bastille Linux: system hardening with Lynis

System hardening with Lynis Many people used Bastille Linux to harden their Linux systems. Unfortunately the website of Bastille seems very outdated, including the tool. This resulted in people searching for a great alternative to replace this tool. We found the alternative by actually combining different solutions, being more powerful. Security automation is hot, so forget Bastille and do it the right way. Automatic hardening makes sense Most system administrators can’t keep up with the new technologies and security threats. […]

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How to create custom tests in Lynis

Last updated on September 17th, 2016Custom tests in Lynis Although Lynis has many tests built-in, there are enough reasons to create your own custom tests. Instead of patching up existing files, there is a better way to run them and make use of existing functions. In this article we will have a look on how to create your own tests and what functions can be used. With the software being open source and licensed under GPL, you have the flexibility […]

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Installation of Lynis on Arch Linux systems

Install Lynis on Arch Linux Tutorial for Lynis installation on Arch Linux Pacman Arch Linux is getting more popular, due to its great community support and the way it is organized. Being a “rolling release” system, it is continuously up-to-date. Of course you want to make sure your security defenses are equally up-to-date, so that’s where Lynis comes in. Normally pacman is used for installing new packages. Unfortunately, the lynis package does not show up. [root@archlinux ~]# pacman -Ss lynis […]

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5 things you didn’t know about shell scripting

Last updated on June 30th, 2018Our security auditing tool Lynis is a toolkit consisting of several shell scripts. Many users of the software actually never realized it was written as a bunch of shells scripts. Now that the secret is out, it is time to learn why we used shell scripting. Here are 5 reasons! 1. Shell scripting is powerful Yes, people asked us why our tool Lynis was not written in Perl, Python, Ruby, C++ etc.. But honestly, why […]

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How to deal with Lynis suggestions?

Last updated on October 20th, 2014How to deal with Lynis suggestions? After finishing an audit with Lynis, the screen is usually filled with a lot of suggestions. Most users don’t know where to start with hardening and how to deal with these Lynis suggestions in particular. We provide you some tips! Before we start, we strongly suggest to use the latest version of Lynis. If you are using an outdated version from the software repositories, the output could be slightly […]

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Lynis Security Notice: 1.5.4 and older

Last updated on May 27th, 2018Lynis Security Notice: 1.5.4 and older This week a vulnerability was reported in versions up to Lynis 1.5.4. With Lynis being a security audit tool and focused on hardening Linux and Unix based systems, we regret any (security) bug being discovered. Since it is open source software, we like to be open about the issue, to help you understanding it and take the right precautions. Description: The temporary files created in the tests_webservers section are […]

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How to keep Lynis up-to-date?

Last updated on October 20th, 2014How to keep Lynis up-to-date? Keeping software like Lynis up-to-date is nowadays very important. More and more vendors implement software development methodologies like agile and scrum, to decrease the time between new software versions. This way software enhancements are easier to implement and possible bugs earlier fixed. It’s up to the user of the software to stay up-to-date and therefore we provide some tips on how to update Lynis easily. Notifications Staying up-to-date begins with […]

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Unix security audit: Perform an audit in 3 minutes

Last updated on October 20th, 2014Unix security audit: Perform an audit in 3 minutes Want to know the vulnerabilities of a Unix/Linux system is in just 3 minutes? How? Perform a scan with Lynis, the open source Unix security audit tool! Lynis Lynis is open source software (GPLv3), released in 2007 and a popular choice by many security professionals and system administrators. Hundreds of downloads in the first week of each release and with a lot of community feedback, Lynis […]

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Become a Linux auditor: tips to start with auditing the Linux platform

Last updated on October 20th, 2014Become a Linux auditor: tips to start with auditing the Linux platform This guide helps people new to the Linux platform to get a grasp on how the system works. Whenever you are an IT auditor, or simply want to know more about the basics, this guide helps you in determining where to start an audit. Processes Each operating system consists of smaller running processes. In case of Linux this is true as well and […]

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How to: Using Lynis plugins

Last updated on July 9th, 2018Within this “how to” we explain when and how to use Lynis plugins. What are plugins? Plugins are small extensions to an existing program. Also Lynis supports the use of external plugins to extend functionality. Lynis plugins are written in shell script and might use system binaries or external binaries to perform additional checks. The big difference between custom tests and plugins in Lynis, are the goal of the tests. If some logic function checks […]

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