fail2ban
saslfail: Escalating Fail2ban Bans for Postfix SASL Authentication Attacks
Standard fail2ban bans just get waited out. saslfail uses escalating bans — 48 hours, 8 days, 32 days — backed by a persistent SQLite database that survives restarts and remembers
Hardening a WordPress Server in an Afternoon
Most WordPress hardening guides are bloated with solved problems. This is the version for self-hosters who want to spend an afternoon on what actually matters: permissions, auth, and server config.