Port Knocking allows you to open or close a remote port in a server’s firewall […]
Getting Reverse Shells
A Reverse Shell is useful for passing through routers and firewalls that allow outbound connections […]
SSH Audit Server and Client Ubuntu
Installing the SSH Audit tool: sudo snap install ssh-audit OR pip3 install ssh-audit OR docker […]
Reverse Proxy with NGINX and SSL/TLS (Let’s Encrypt)
In this tutorial, we will go through: Installing and configuring NGINX, Installing and configuring SSL/TLS, […]
SED Cheat Sheet – Stream Editor with RegEx
Sed is a text/string editor command-line tool. Follow the most basic commands: sed ‘s/LOOKFOR/REPLACE/‘ file.txt […]
E-mail Backup Server with Postfix on Ubuntu
Add another MX record on the domain DNS with a priority different (e.g. 10) from […]
Linux Active Directory / Domain Controller (AD-DC) with Zentyal
Zentyal is an open-source email and groupware solution. It has its own Ubuntu-based distribution but […]
Installing a GUI on Ubuntu Server
Installing a Graphical User Interface (GUI) on a Linux Server instance creates a desktop environment […]
Linux as Active Directory / Domain Controller (AD-DC) Replication
sudo apt update && sudo apt upgrade -y sudo hostnamectl set-hostname ad1 sudo nano /etc/hosts […]
SAMBA Sharing with AD Permissions on Ubuntu
This post is a continuation of the posts: Linux as AD-DC Principal [Link], Linux as […]