Create a shell script (iptables_flush.sh) and copy paste the following lines:

#!/bin/sh echo "Flushing iptables rules..." sleep 1 iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT Make the file executable

chmod +x iptables_flush.sh and run the script:

./iptables_flush.sh