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fail2ban

cheat sheet · Ubuntu 24.04 · fail2ban 1.0 https://lab.dimsanych.ru/en/wiki/fail2ban/

Cheat sheet

  • sudo fail2ban-client status jails
  • sudo fail2ban-client status sshd banned IPs
  • sudo fail2ban-client set sshd unbanip 1.2.3.4 unban
  • sudo fail2ban-regex /var/log/auth.log sshd test a filter
  • jail.local: bantime, findtime, maxretry, ignoreip, backend
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