[Definition]

actionstart = iptables -N fail2ban-<name>
              iptables -A fail2ban-<name> -j RETURN
              iptables -I <chain> -p <protocol> -j fail2ban-<name>

actionstop  = iptables -D <chain> -p <protocol> -j fail2ban-<name> || true
              iptables -F fail2ban-<name> || true
              iptables -X fail2ban-<name> || true

actioncheck = iptables -n -L <chain> | grep -q fail2ban-<name>

actionban   = iptables -I fail2ban-<name> 1 -s <ip> -j DROP

actionunban = iptables -D fail2ban-<name> -s <ip> -j DROP

[Init]
name     = default
protocol = tcp
chain    = INPUT