Fail2ban dovecot

Hydra installieren

• apt install hydra

brute Force auf den Rechner

• hydra -S -v -l xinux -P bad-passwords -s 993 -f 10.88.201.21 imap

sshd in fail2ban aktivieren

• echo -e "[dovecot]\nenabled = true\n" >> /etc/fail2ban/jail.local

fail2ban neustarten

• systemctl restart fail2ban

Status checken

• fail2ban-client status dovecot

Status for the jail: dovecot
|- Filter
|  |- Currently failed:	0
|  |- Total failed:	45
|  `- File list:	/var/log/mail.log
`- Actions
   |- Currently banned:	0
   |- Total banned:	1
   `- Banned IP list:

Alles unbannen

• fail2ban-client unban --all