How to audit SSH server and client config on Linux/Unix


{Updated} All developers and Unix users know how to use an ssh client. OpenSSH is a widely used implementation of Secure Shell (SSH) Internet communication protocol. Back in the old days, Unix folks used Telnet which was insecure. On the other hand, SSH allows exchanging data using a secure channel between two hosts. Therefore, every Linux and Unix server running cloud or at home needs an OpenSSH server for management and IT automation. Regrettably, the popularity of SSH servers and client also brings various security issues. I wrote about 'Top 20 OpenSSH Server Best Security Practices' a long time ago. Today, I will talk about ssh server and client auditing tools that anyone can use to the hardened standard SSH server and client configuration for security issues.

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