Cloudflare DDNS

JavaScript script to get a machine's public IP and update Cloudflare DNS records using Cloudflare API. Works on anything that can run Node.js.

Prerequisites

Node.js v16 or later

Installation

1. Clone the repository
2. Run npm install to install dependencies
3. Rename config.example.json to config.json

Configuration

1. Ger your Cloudflare Zone ID and Account ID from Cloudflare Dashboard -> Overview and set them in config.json.
2. Click on Get your API token and create a new API Token with Edit DNS rights for your domain and set it in config.json.
3. Run node getDNS.js to get the DNS id(s). You only need to run this once. Configure all your domains with their IDs in config.json CLOUDFLARE_DNS_RECORDS array.
4. Other settings such as proxied or type are hard-coded in the updateDNS function but can be changed as needed. Refer to the Cloudflare DNS API documentation.
5. node . to run the script manually

Scheduled run

Linux

You can use a cron job to run the script at a specific interval. For example, to run the script every 10 minutes, add the following line to your crontab by running crontab -e:

*/10 * * * * cd /path/to/script/cloudflare-ddns/ && /usr/bin/node /path/to/script/cloudflare-ddns/index.js

Windows

You can use Task Scheduler to run the script at a specific interval. Create a new basic task with the following settings:

Program/script: "Powershell" Add arguments (optional): cd "C:\path\to\script\" | node index.js