Temporary Reset existing IPTables rules till system reboot

vim /etc/stop_firewall.sh

#!/bin/sh
echo "Reseting 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

chmod +x /etc/stop_firewall.sh

sh /etc/stop_firewall.sh