Reset Firewall Rules

firewall-reset.sh

#!/bin/bash

# This script resets the firewall rules, installs iptables-persistent, and saves the rules to files.

# Set the default policies to accept all traffic
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

# Flush all existing rules and chains
iptables -F

# Install iptables-persistent package to save and restore firewall rules on system reboot
apt install iptables-persistent -y

# Save the current IPv4 and IPv6 rules to files
iptables-save > /etc/iptables/rules.v4
ip6tables-save > /etc/iptables/rules.v6

# Display the current firewall rules
iptables -nvL