VPN security, hardening, firewall rules, and best practices.
What to log on a self-hosted VPN, what to avoid, retention policies, and how to keep operational visibility without collecting unnecessary user traffic data.
Operational SSH security for VPN and VPS fleets: key lifecycle, jump hosts, access reviews, break-glass procedures, and least privilege—beyond a single sshd_config checklist.
A runbook for rotating WireGuard and OpenVPN credentials without locking out users: dual-key windows, inventory hygiene, and compromise response.
What “best VPN encryption” means in practice: modern ciphers, protocol defaults, key exchange, and how WireGuard and OpenVPN compare for self-hosted fleets.
Install and configure Fail2Ban on Ubuntu to ban abusive SSH (and other) clients: jails, filters, ban times, ignoreip, and how it complements UFW on a VPN VPS.
Harden OpenSSH on Ubuntu with concrete sshd_config settings: key-only auth, disable root login, restrict users, modern ciphers, and a host hardening checklist.
Configure UFW on Ubuntu the right way: default deny, allow SSH first, open WireGuard UDP, rate limiting, and rules that survive reboots without locking yourself out.
A practical hardening checklist for Ubuntu VPS servers: SSH keys, firewall, updates, users, Fail2Ban, and baseline controls before you run production services.