fail2ban in Nextcloud startet nicht auf Debian 12

[ssoftS]

fehlend:
apt install python3-systemd

• add a file /etc/fail2ban/fail2ban.local:
  [DEFAULT]
  allowipv6 = auto

• add to /etc/fail2ban/jail.d/defaults-debian.conf
  [sshd]
  enabled = true
  backend=systemd

systemctl restart fail2ban