Pi-hole - A Simple Bash Script to Update the Home/ISP ip address in UFW Firewall to access port 53

.env

VPSIP=XXX.XX.XX.X
PASSWORD='SERVERPASSWORD'

home.sh

#!/bin/bash
# Setup Reference: https://blog.sbstp.ca/vps-pihole/

# Load ENV Variables
. .env

# GET IP
ip=$(curl -s https://api.ipify.org)

# File Name
ip_file="ip_data.txt"

# Load VPS IP from ENV
vps_ip=$VPSIP

# Verify File exist or not
if [ -f "$ip_file" ]; then
    source $ip_file
    echo "Get IP from data file: $data"
else 
    echo "$ip_file does not exist."
    exit 1
fi

# Updating Firewall Rules
if [ $ip = $data ]; then
    echo "IP Exist in UFW Rules - Readded for Verification"
    sleep 2;
    sshpass -p $PASSWORD ssh root@$vps_ip "ufw allow from $ip to any port 53 && ufw reload"
else 
    sshpass -p $PASSWORD ssh root@$vps_ip "ufw delete allow from $data to any port 53 && ufw reload"
    sleep 2;
    sshpass -p $PASSWORD ssh root@$vps_ip "ufw allow from $ip to any port 53 && ufw reload"
    sleep 2;
    echo "data=$ip" > $ip_file
fi

ip.sh

#!/bin/bash
# Setup Reference: https://blog.sbstp.ca/vps-pihole/

ip=$(curl -s https://api.ipify.org)
ip_file="ip_data.txt"

echo "data=$ip" > $ip_file

echo "Your Network IP is $ip"