Enable Two-Factor Auth for Cockpit with Google Authenticator | Cockpit is the awesome web interface to manage a Linux VM or server. For best security, one can setup two-factor auth with google authenticator for Cockpit. Here is a how-to for Fedora Linux 25!
Configure Strong Ciphers for SSH | Debian Linux | OpenSSH server has fairly weak ciphers by default on Debian Linux. Here is an example of how to tighten security specifying stronger ciphers!
Update pfSense from the command line | pfSense is awesome open source router software based on FreeBSD. It features a nice web interface to do any tasks! While the main way to administer and upgrade pfSense is via the web interface, one can also upgrade via command line. Check it out!
Getting started with FirewallD | Here is a quick how-to to enable a port or service with FirewallD!
Generate Strong Passwords on the Command Line With OpenSSL | openssl can be used to generate random strings which make good passwords. Check it out!
Use nmap to Test For Open Mail Relay | nmap has a built-in script to check for an open relay. Check it out!
Script to Remove Readme and License Files From Wordpress Installations | By default, Wordpress, themes, and plugins will install readme and license files which can be a source of information leakage to a hacker. Here is a quick script to remove those files!
How to Remove China CNNIC Root CA from Debian | Google removed the CNNIC Root CA from all Google products. For security, this CA should also be removed from your Debian stash of trusted Root CAs.
debsecan – Get an Emailed Report of Pending Debian Security Updates | debsecan is an exclusive app for Debian which helps check and notify if your server has pending security updates. Check it out!