We published the following series of articles.
Home network security series
The Home network security series shows ways to improve the security of your home network. This series is based on the Czech open-source router Turris Omnia.
Web server security series
The Web server security series shows ways to secure your web server. This series is based on Debian and Apache web server.
Hack The Box series
The Hack The Box series contains walkthroughs for retired Hack The Box machines. We occasionally add new walkthroughs.