Installation de Fail2ban
De www.yakakliker.org
Installation & configuration du firewall UFW
sudo apt install ufw -y
Autorisation du SSH dans UFW
sudo ufw allow ssh
Activation du service UFW
sudo ufw enable
Installation & configuration de Fail2ban
sudo apt install fail2ban -y
Activation du service Fail2ban
sudo systemctl enable fail2ban
sudo systemctl start fail2ban
Configuration du service Fail2ban
sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
sudo nano /etc/fail2ban/jail.local
Ajout des IP LAN qui ne seront pas surveillées par Fail2ban
ignoreip = 127.0.0.1/8 ::1 192.168.1.0/24 192.168.10.20
Paramétrage du bannissement des IP
bantime = 30d
findtime = 10m
maxretry = 5
banaction = ufw
Liens
https://www.howtoforge.com/how-to-install-fail2ban-on-ubuntu-22-04/#configuring-failban
https://www.digitalocean.com/community/tutorials/how-to-protect-ssh-with-fail2ban-on-ubuntu-22-04