How to find out your Public IP Address

Your IP Address is your number on the Internet. It's similar to your home address or personal cell phone number. IPv4 is the bulk of the internet. It is comprised of four sets of numbers that range from 0 - 255. Example 1.1.1.1. IPv6 is

Personal Data Server

A personal data server for the AT Protocol is a self-hosted server that securely stores and manages user data, enabling decentralized identity, content, and interactions within a federated social networking system.

IKEv2 VPN with Ubuntu and Apple

How to build an IKEv2 VPN server for Apple devices.

Sender Authentication

Sender Authentication is a standard that uses DNS to publicly verify your email messages.

GPG Keys

GPG / PGP Keys are the bane of forensic investigators. They are a pair of digital keys which secure your data and make your conversations private.

Generate SSH Keys

Three steps to generate and install your own SSH keys. Never use a password to log into the Linux server again.

How to Install and Configure Wireguard on Ubuntu

In seven steps, configure wireguard on ubuntu for your own private VPN.

Using UFW to Rate Limit SSH Connections for Security

ufw limit allows up to six new connections every 30 seconds. If exceeded, the source IP is temporarily banned for 30 seconds.