Pakete:

Per default überwacht fail2ban bei debian ssh: 

egrep -A7 '\[sshd?\]' /etc/fail2ban/jail.conf
less /etc/fail2ban/filter.d/sshd.conf
/etc/fail2ban/jail.conf
…
[DEFAULT]
…
banaction = iptables-multiport
…
less /etc/fail2ban/action.d/iptables-multiport.conf

fail2ban Zusammenfassung der Konfiguration anzeigen: 

fail2ban-client status
fail2ban-client status sshd

Apache Basic Auth

Pakete: apache2 fail2ban (Debian 9) 

mkdir -p /srv/www/fail2ban
htpasswd -c /srv/www/htpasswd_fail2ban heinz
/etc/apache2/conf-available/fail2ban-apache-auth-test.conf
<directory /srv/www/fail2ban>
  AllowOverride AuthConfig
  AuthType        Basic
  AuthName        "Bitte Username und Passwort"
  AuthBasicProvider file
  AuthUserFile    /srv/www/htpasswd_fail2ban
  Require         valid-user
</directory>
/srv/www/fail2ban/index.html
<html>
  <head>
    <title>Hello fail2ban!</title>
  </head>
  <body>
    Hello fail2ban
  </body>
</html>

Zugriff lokal testen: 

wget --user heinz --password xxx -nv -O - http://127.0.0.1/fail2ban-test/index.html
/etc/fail2ban/jail.local
[apache-auth]
enabled = true
fail2ban-client reload
fail2ban-client status
fail2ban-client status apache-auth

Von einem anderen Rechner aus: 

ab -n 10 -A heinz:nono http://192.168.212.11/fail2ban-test/index.html
less /var/log/fail2ban.log