Debian

TL;DR To secure your SSH access on Debian 13, follow these key steps: Generate ed25519 SSH Keys: Use the ed25519 algorithm for stronger security. Important: Use a strong passphrase to protect your private key. ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519 # Generate key with interactive passphrase prompt Security Note: Never use empty passphrases (-N "") in production environments. If automation requires passwordless keys, use ssh-agent or dedicated service accounts with restricted permissions. ...

TL;DR To secure your Nginx server with TLS 1.3 on Debian 13, follow these best practices: Update Packages: Ensure your system and Nginx are up to date to leverage the latest security features. sudo apt update && sudo apt upgrade -y # Update package list and upgrade installed packages Install Required Packages: Make sure you have the necessary packages installed. ...

TL;DR To harden your Debian 13 server for internet-facing applications, follow these essential steps: Update the System: Ensure all packages are up-to-date to mitigate vulnerabilities. sudo apt update && sudo apt upgrade -y # Update package lists and upgrade installed packages Configure the Firewall: Use ufw to allow only necessary ports. ...

TL;DR To quickly secure your Debian 13 server, follow these steps to set up UFW (Uncomplicated Firewall) and Fail2ban. Install UFW and Fail2ban: Ensure both packages are installed on your system. sudo apt update && sudo apt install ufw fail2ban -y # Install UFW and Fail2ban Configure UFW: Start by setting default policies to deny incoming connections and allow outgoing ones. ...