Apple
IKEv2 VPN with Ubuntu and Apple
How to build an IKEv2 VPN server for Apple devices.
Security
Security
Sender Authentication
Sender Authentication is a standard that uses DNS to publicly verify your email messages.
Security
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.
Linux
Generate SSH Keys
Three steps to generate and install your own SSH keys. Never use a password to log into the Linux server again.
Linux
How to Install and Configure Wireguard on Ubuntu
In seven steps, configure wireguard on ubuntu for your own private VPN.
Linux
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.