Reset iptables

clear_iptables.sh

#!/bin/bash

# https://www.digitalocean.com/community/tutorials/how-to-list-and-delete-iptables-firewall-rules

# First, set the default policies for each of the built-in chains to ACCEPT. 
# The main reason to do this is to ensure that you won't be locked out from your server via SSH:
sudo iptables -P INPUT ACCEPT
sudo iptables -P FORWARD ACCEPT
sudo iptables -P OUTPUT ACCEPT

# Then flush the nat and mangle tables, flush all chains (-F), and delete all non-default chains (-X):
sudo iptables -t nat -F
sudo iptables -t mangle -F
sudo iptables -F
sudo iptables -X