Server Security

SSH or Secure Shell is a popular protocol for doing system administration on Linux systems. Sometimes you may need to know what version you are running to know if some specific configuration options are available. In this article we have a look at the available options. Local OpenSSH version The easiest way to find the installed OpenSSH version is using the ssh -V command. This works when being logged in to the system itself.

SSH or Secure Shell is the popular protocol for doing system administration on Linux systems. It runs on most systems, often with its default configuration. As this service opens up a potential gateway into the system, it is one of the steps to hardening a Linux system. This article covers the SSH security tips to secure the OpenSSH service and increase the defenses of the system. OpenSSH security OpenSSH is under development by the security fanatics from the OpenBSD project.

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 role of the system, sensitivity of data and possible threats, we can then select what security safeguards are appropriate.