feat: WAN IP Guard - dynamic DNS updater with WhatsApp notifications
Checks public WAN IP every 5 minutes via systemd timer. On change: - Updates A-records via DirectAdmin API (login key auth) - Sends WhatsApp notification via wwebjs-api
This commit is contained in:
Eddy de Vink
commit
c4c80e98af
9 changed files with 461 additions and 0 deletions
16
.env.example
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16
.env.example
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# DirectAdmin API credentials
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DA_LOGIN_KEY=your_login_key_here
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DA_USERNAME=your_username
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DA_BASE_URL=https://panel.example.com:2222
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DA_DOMAIN=example.com
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# WhatsApp API (wwebjs-api)
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WHATSAPP_API_ENDPOINT=http://localhost:3001
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WHATSAPP_SESSION=your_session
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ADMIN_PHONE=31600000000
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# DNS records to update (comma-separated, use domain name for apex)
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DNS_RECORDS=example.com,git,www
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# State file path (where to store last known IP)
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STATE_FILE=/var/lib/wan-ip-guard/current_ip
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3
.gitignore
vendored
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.gitignore
vendored
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.env
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node_modules/
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*.log
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114
README.md
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README.md
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# WAN IP Guard
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Bewaakt het publieke WAN IP en update automatisch DNS records bij wijziging, plus WhatsApp notificatie.
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## Wat doet het?
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- Controleert elke 5 minuten het publieke WAN IP
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- Bij wijziging:
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- Updatet A-records via de DirectAdmin API
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- Stuurt een WhatsApp notificatie naar de admin
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- Draait als systemd timer
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## Installatie
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### 1. Clone op je server
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```bash
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cd ~
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git clone <jouw-repo-url> wan-ip-guard
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cd wan-ip-guard
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```
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### 2. Configureer
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```bash
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cp .env.example .env
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# Edit .env met je credentials
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nano .env
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```
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### 3. Installeer dependencies
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```bash
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npm install --omit=dev
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```
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### 4. Systemd setup
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```bash
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# State directory
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sudo mkdir -p /var/lib/wan-ip-guard
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sudo chown $USER:$USER /var/lib/wan-ip-guard
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# Pas de paden in systemd/*.service aan naar jouw setup
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# (gebruiker, WorkingDirectory, ExecStart, EnvironmentFile)
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# Systemd units
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sudo cp systemd/wan-ip-guard.service /etc/systemd/system/
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sudo cp systemd/wan-ip-guard.timer /etc/systemd/system/
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sudo systemctl daemon-reload
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sudo systemctl enable --now wan-ip-guard.timer
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```
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## Configuratie (.env)
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| Variabele | Beschrijving | Voorbeeld |
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|-----------|-------------|-----------|
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| `DA_LOGIN_KEY` | DirectAdmin Login Key | `your_login_key` |
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| `DA_USERNAME` | DirectAdmin gebruiker | `your_username` |
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| `DA_BASE_URL` | DirectAdmin base URL | `https://panel.example.com:2222` |
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| `DA_DOMAIN` | Domeinnaam | `example.com` |
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| `WHATSAPP_API_ENDPOINT` | wwebjs-api URL | `http://localhost:3001` |
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| `WHATSAPP_SESSION` | WhatsApp sessie naam | `your_session` |
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| `ADMIN_PHONE` | Admin telefoonnummer | `31600000000` |
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| `DNS_RECORDS` | Komma-gescheiden records | `example.com,git,www` |
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| `STATE_FILE` | Pad naar state file | `/var/lib/wan-ip-guard/current_ip` |
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## DirectAdmin Login Key aanmaken
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1. Log in op het DirectAdmin panel
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2. Ga naar **Accountbeheer** → **Login Keys**
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3. Maak een nieuwe key aan met rechten voor **DNS Control**
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4. Sla de key op (het wordt maar één keer getoond)
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## Beheer
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```bash
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# Timer status
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systemctl status wan-ip-guard.timer
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# Logs volgen
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journalctl -u wan-ip-guard -f
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# Handmatig draaien
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cd ~/wan-ip-guard && node index.js
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# Timer herstarten
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sudo systemctl restart wan-ip-guard.timer
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# State bestand resetten (forceer update bij volgende run)
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rm /var/lib/wan-ip-guard/current_ip
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```
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## Hoe het werkt
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1. **IP detectie:** Haalt het WAN IP op via `ifconfig.me` met fallback naar `api.ipify.org` en `icanhazip.com`
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2. **State vergelijking:** Vergelijkt met het laatst opgeslagen IP in de state file
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3. **DNS update:** Voor elke record: verwijder oud A-record + voeg nieuw A-record toe via DirectAdmin API
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4. **Notificatie:** Stuurt WhatsApp bericht met oud/nieuw IP en status per record
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## Files
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```
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wan-ip-guard/
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├── index.js # Hoofdscript
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├── package.json
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├── .env.example # Config template
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├── deploy.sh # Deployment script
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├── systemd/
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│ ├── wan-ip-guard.service
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│ └── wan-ip-guard.timer
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└── docs/
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└── design-spec.md
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```
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57
deploy.sh
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deploy.sh
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#!/bin/bash
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set -euo pipefail
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# WAN IP Guard - Deployment script
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# Configure the variables below for your setup, then run from your local machine
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REMOTE_USER="your-ssh-user"
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REMOTE_HOST="your-server"
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REMOTE_DIR="/home/your-ssh-user/wan-ip-guard"
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echo "=== WAN IP Guard Deployment ==="
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echo ""
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# 1. Sync files to server
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echo "[1/5] Syncing files to ${REMOTE_HOST}..."
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rsync -avz --delete \
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--exclude 'node_modules' \
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--exclude '.git' \
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--exclude '*.log' \
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--exclude '.env' \
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./ "${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_DIR}/"
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echo " Done."
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echo ""
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# 2. Install dependencies
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echo "[2/5] Installing npm dependencies..."
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ssh "${REMOTE_USER}@${REMOTE_HOST}" "cd ${REMOTE_DIR} && npm install --omit=dev"
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echo " Done."
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echo ""
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# 3. Create state directory
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echo "[3/5] Creating state directory..."
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ssh "${REMOTE_USER}@${REMOTE_HOST}" "sudo mkdir -p /var/lib/wan-ip-guard && sudo chown ${REMOTE_USER}:${REMOTE_USER} /var/lib/wan-ip-guard"
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echo " Done."
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echo ""
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# 4. Install systemd service + timer
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echo "[4/5] Installing systemd units..."
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ssh "${REMOTE_USER}@${REMOTE_HOST}" "
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sudo cp ${REMOTE_DIR}/systemd/wan-ip-guard.service /etc/systemd/system/
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sudo cp ${REMOTE_DIR}/systemd/wan-ip-guard.timer /etc/systemd/system/
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sudo systemctl daemon-reload
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sudo systemctl enable wan-ip-guard.timer
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sudo systemctl start wan-ip-guard.timer
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"
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echo " Done."
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echo ""
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# 5. Verify
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echo "[5/5] Verifying deployment..."
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ssh "${REMOTE_USER}@${REMOTE_HOST}" "systemctl status wan-ip-guard.timer --no-pager"
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echo ""
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echo "=== Deployment complete! ==="
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echo "The timer runs every 5 minutes."
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echo "Check logs: ssh ${REMOTE_USER}@${REMOTE_HOST} journalctl -u wan-ip-guard -f"
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echo "Run manually: ssh ${REMOTE_USER}@${REMOTE_HOST} cd ${REMOTE_DIR} && node index.js"
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index.js
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index.js
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#!/usr/bin/env node
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'use strict';
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require('dotenv').config();
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const fs = require('fs');
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const path = require('path');
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const CONFIG = {
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stateFile: process.env.STATE_FILE || '/var/lib/wan-ip-guard/current_ip',
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daBaseUrl: process.env.DA_BASE_URL,
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daUsername: process.env.DA_USERNAME,
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daLoginKey: process.env.DA_LOGIN_KEY,
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daDomain: process.env.DA_DOMAIN,
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whatsappApi: process.env.WHATSAPP_API_ENDPOINT || 'http://localhost:3001',
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whatsappSession: process.env.WHATSAPP_SESSION || 'EdGpt',
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adminPhone: process.env.ADMIN_PHONE,
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dnsRecords: (process.env.DNS_RECORDS || '').split(',').map(s => s.trim()).filter(Boolean),
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};
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function log(msg) {
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console.log(`[${new Date().toISOString()}] ${msg}`);
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}
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function logError(msg) {
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console.error(`[${new Date().toISOString()}] ERROR: ${msg}`);
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}
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async function fetchWithTimeout(url, options = {}, timeout = 15000) {
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const controller = new AbortController();
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const timer = setTimeout(() => controller.abort(), timeout);
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try {
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return await fetch(url, { ...options, signal: controller.signal });
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} finally {
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clearTimeout(timer);
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}
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}
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async function getWanIp() {
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const services = [
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'https://ifconfig.me',
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'https://api.ipify.org',
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'https://icanhazip.com',
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];
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for (const url of services) {
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try {
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const resp = await fetchWithTimeout(url, {}, 10000);
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if (resp.ok) {
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const ip = (await resp.text()).trim();
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if (/^\d{1,3}(\.\d{1,3}){3}$/.test(ip)) {
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log(`WAN IP obtained from ${url}: ${ip}`);
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return ip;
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}
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}
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} catch (e) {
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log(`Could not get IP from ${url}: ${e.message}`);
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}
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}
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throw new Error('Could not determine WAN IP from any service');
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}
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function readState() {
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try {
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return fs.readFileSync(CONFIG.stateFile, 'utf8').trim();
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} catch {
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return null;
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}
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}
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function writeState(ip) {
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const dir = path.dirname(CONFIG.stateFile);
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fs.mkdirSync(dir, { recursive: true });
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fs.writeFileSync(CONFIG.stateFile, ip + '\n');
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}
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async function daRequest(endpoint) {
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const url = `${CONFIG.daBaseUrl}${endpoint}`;
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const auth = Buffer.from(`${CONFIG.daUsername}:${CONFIG.daLoginKey}`).toString('base64');
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const resp = await fetchWithTimeout(url, {
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headers: { Authorization: `Basic ${auth}` },
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});
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const text = await resp.text();
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if (!resp.ok) {
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throw new Error(`DirectAdmin API ${resp.status}: ${text}`);
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}
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return text;
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}
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async function getDnsRecords() {
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const text = await daRequest(`/CMD_API_DNS_CONTROL?domain=${encodeURIComponent(CONFIG.daDomain)}`);
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const records = {};
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for (const line of text.split('\n')) {
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const match = line.match(/^(.+?)\s+\d+\s+IN\s+A\s+(\d+\.\d+\.\d+\.\d+)$/);
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if (match) {
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let name = match[1].trim();
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if (name === `${CONFIG.daDomain}.` || name === CONFIG.daDomain) {
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name = '';
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}
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records[name] = match[2];
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}
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}
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return records;
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}
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async function deleteDnsRecord(name, ip) {
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const recordValue = `${name}=${ip}`;
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const endpoint = `/CMD_API_DNS_CONTROL?domain=${encodeURIComponent(CONFIG.daDomain)}&action=select&arecs0=${encodeURIComponent(recordValue)}`;
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await daRequest(endpoint);
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}
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async function addDnsRecord(name, ip) {
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const endpoint = `/CMD_API_DNS_CONTROL?domain=${encodeURIComponent(CONFIG.daDomain)}&action=add&type=A&name=${encodeURIComponent(name)}&value=${encodeURIComponent(ip)}`;
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await daRequest(endpoint);
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}
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async function sendWhatsApp(message) {
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const url = `${CONFIG.whatsappApi}/client/sendMessage/${CONFIG.whatsappSession}`;
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const chatId = `${CONFIG.adminPhone}@c.us`;
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try {
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const resp = await fetchWithTimeout(url, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ chatId, content: message, contentType: 'string' }),
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}, 10000);
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if (!resp.ok) {
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logError(`WhatsApp send failed: ${resp.status}`);
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} else {
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log('WhatsApp notification sent.');
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}
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} catch (e) {
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logError(`WhatsApp send error: ${e.message}`);
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}
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}
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async function main() {
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log('WAN IP Guard check starting.');
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if (!CONFIG.daLoginKey || !CONFIG.daUsername || !CONFIG.daDomain) {
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throw new Error('Missing required environment variables. Check .env file.');
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}
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const currentIp = await getWanIp();
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const savedIp = readState();
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if (savedIp === currentIp) {
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log(`IP unchanged (${currentIp}). Nothing to do.`);
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return;
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}
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log(`IP changed: ${savedIp || '(none)'} -> ${currentIp}`);
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let dnsRecords = {};
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try {
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dnsRecords = await getDnsRecords();
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log(`Current DNS A records: ${JSON.stringify(dnsRecords)}`);
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} catch (e) {
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logError(`Could not query DNS records: ${e.message}`);
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}
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const results = [];
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for (const record of CONFIG.dnsRecords) {
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const name = record === CONFIG.daDomain ? '' : record;
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const label = name || '(apex)';
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const oldIp = dnsRecords[name] || dnsRecords[record];
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try {
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if (oldIp) {
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await deleteDnsRecord(name, oldIp);
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}
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await addDnsRecord(name, currentIp);
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results.push(`✅ ${label}`);
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log(`Updated ${label}: ${oldIp || '(none)'} -> ${currentIp}`);
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} catch (e) {
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results.push(`❌ ${label}: ${e.message}`);
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logError(`Failed to update ${label}: ${e.message}`);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
const successCount = results.filter(r => r.startsWith('✅')).length;
|
||||||
|
const failCount = results.filter(r => r.startsWith('❌')).length;
|
||||||
|
|
||||||
|
const message = [
|
||||||
|
'🔄 *WAN IP Gewijzigd*',
|
||||||
|
'',
|
||||||
|
`*Oud:* ${savedIp || '(onbekend)'}`,
|
||||||
|
`*Nieuw:* ${currentIp}`,
|
||||||
|
'',
|
||||||
|
'*DNS Updates:*',
|
||||||
|
...results,
|
||||||
|
'',
|
||||||
|
`${successCount} gelukt, ${failCount} mislukt`,
|
||||||
|
].join('\n');
|
||||||
|
|
||||||
|
await sendWhatsApp(message);
|
||||||
|
writeState(currentIp);
|
||||||
|
log(`State saved: ${currentIp}`);
|
||||||
|
log('Done.');
|
||||||
|
}
|
||||||
|
|
||||||
|
main().catch(e => {
|
||||||
|
logError(`Fatal: ${e.message}`);
|
||||||
|
process.exit(1);
|
||||||
|
});
|
||||||
30
package-lock.json
generated
Normal file
30
package-lock.json
generated
Normal file
|
|
@ -0,0 +1,30 @@
|
||||||
|
{
|
||||||
|
"name": "wan-ip-guard",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"lockfileVersion": 3,
|
||||||
|
"requires": true,
|
||||||
|
"packages": {
|
||||||
|
"": {
|
||||||
|
"name": "wan-ip-guard",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"dependencies": {
|
||||||
|
"dotenv": "^16.4.5"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">=18"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/dotenv": {
|
||||||
|
"version": "16.6.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
|
||||||
|
"integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
|
||||||
|
"license": "BSD-2-Clause",
|
||||||
|
"engines": {
|
||||||
|
"node": ">=12"
|
||||||
|
},
|
||||||
|
"funding": {
|
||||||
|
"url": "https://dotenvx.com"
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
15
package.json
Normal file
15
package.json
Normal file
|
|
@ -0,0 +1,15 @@
|
||||||
|
{
|
||||||
|
"name": "wan-ip-guard",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"description": "Monitors WAN IP changes and updates DNS records + sends WhatsApp notification",
|
||||||
|
"main": "index.js",
|
||||||
|
"scripts": {
|
||||||
|
"start": "node index.js"
|
||||||
|
},
|
||||||
|
"dependencies": {
|
||||||
|
"dotenv": "^16.4.5"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">=18"
|
||||||
|
}
|
||||||
|
}
|
||||||
12
systemd/wan-ip-guard.service
Normal file
12
systemd/wan-ip-guard.service
Normal file
|
|
@ -0,0 +1,12 @@
|
||||||
|
[Unit]
|
||||||
|
Description=WAN IP Guard - Dynamic DNS updater
|
||||||
|
After=network-online.target
|
||||||
|
Wants=network-online.target
|
||||||
|
|
||||||
|
[Service]
|
||||||
|
Type=oneshot
|
||||||
|
# Change 'your-user' and paths to match your setup
|
||||||
|
User=your-user
|
||||||
|
EnvironmentFile=/home/your-user/wan-ip-guard/.env
|
||||||
|
WorkingDirectory=/home/your-user/wan-ip-guard
|
||||||
|
ExecStart=/usr/bin/node /home/your-user/wan-ip-guard/index.js
|
||||||
11
systemd/wan-ip-guard.timer
Normal file
11
systemd/wan-ip-guard.timer
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
[Unit]
|
||||||
|
Description=Run WAN IP Guard every 5 minutes
|
||||||
|
|
||||||
|
[Timer]
|
||||||
|
OnBootSec=1min
|
||||||
|
OnUnitActiveSec=5min
|
||||||
|
AccuracySec=30s
|
||||||
|
Persistent=true
|
||||||
|
|
||||||
|
[Install]
|
||||||
|
WantedBy=timers.target
|
||||||
Loading…
Reference in a new issue