Install fail2Ban

sec-brute-force-attack.sh

# 1. Instalar Fail2Ban
sudo apt install fail2ban

# 2. Configurar Fail2Ban
sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local

# 2.1 Configure os parametros de acordo com a sua necesidade
[DEFAULT]
bantime  = 10m
findtime = 10m
maxretry = 5

---------------

[sshd]
enabled  = true
port     = ssh
logpath  = /var/log/auth.log
maxretry = 5

# Ativar serviço
sudo systemctl start fail2ban

# Ativar automaticamente
sudo systemctl enable fail2ban

# Verificar status
sudo fail2ban-client status

# 3. Configuração de Email (Opcional)
destemail = your-email@example.com
sender = fail2ban@example.com
mta = sendmail
action = %(action_mwl)s