sudo iptables -A FORWARD -s IP-ADDRESS -j DROP
#!/bin/bash # Check if an IP address is provided if [ -z "$1" ]; then echo "Usage: $0 <IP_ADDRESS>" exit 1 fi IP_ADDRESS=$1 echo "Blocking IP: $IP_ADDRESS" # Add iptables rule to block the IP sudo iptables -A INPUT -s $IP_ADDRESS -j DROP echo "IP $IP_ADDRESS has been blocked."