Linux server security: Three steps to secure each system Determining the level of Linux server security can only by measuring the actual implemented security safeguards. This process is called auditing and focuses on comparing common security measures with the ones implemented. While there is almost no system with all possible safeguards implemented, we still can determine how well (or badly) the system is protected. Security is about finding the weakest link(s) and associate risk with each weakness. Depending on the […]Read more
Auditing is the process of ensuring correct implementation with predefined policies. This blog focuses on the specifics when it comes to technical system auditing.
Lynis for Auditors: Linux and Unix auditing Auditing on Linux Although Unix and Linux based systems are not new, getting an extensive knowledge of the operating system takes years of practice. Even then, with all changes it might be hard to keep up, especially when being an auditor. Examples of these are the differences between package managers, the way services are started and where binaries or configuration files are located. But no worries, there is help! Why Lynis? The goal […]Read more
What is a security audit? In the world of compliance, reported break-ins on the news and many security incidents, it’s common to see a security audit showing up sooner or later. Still, many people in our field don’t like them. But what is a security audit and why should we actually embrace them? Why audit? Auditing has a simple goal: check if something is configured according to best practices, a baseline or a preferred state. In an ideal situation these […]Read more
FreeBSD hardening with Lynis Lynis development has its roots on a FreeBSD system, therefore FreeBSD hardening is also easy and supported when using Lynis. People who want to audit and harden their FreeBSD system will discover Lynis to be a powerful tool for this purpose. In this article we will focus on how to audit your system with Lynis. Lynis Lynis is an open source audit tool. It only requires root access and a normal shell and the tool is […]Read more
CAATTs for Linux Within the field of the audit profession the usage of CAAT (Computer-assisted audit techniques) or CAATTs (computer-assisted audit tools and techniques) is growing. Lynis is filling this gap for Linux and Unix based systems. It’s a well-known and stable tool in this area and improves the audit process by automation. Only a few items could then be checked manually. This saves time, makes the audit more predictable and increases the quality of the overall audit. Lynis Based […]Read more
Introduction Within this article we have a look on how to audit and check the network configuration of Linux and other systems. The main focus is on gathering information and discover how systems are configured. By taking these steps we will do a manual audit. For efficiency reasons we suggest to use an automated tool like Lynis. Where to start? Each Linux distribution has their own way and files to configure the network. Therefore we look at the basic components […]Read more