A Cloudflare Worker script that exposes a UniFi-compatible DDNS API to dynamically update the IP address of a DNS A record.
I have a UniFi Dream Machine Pro (UDM-Pro), and I want to update my Cloudflare domain name DNS records when my public IP address changes. Unfortunately, UniFi does not come pre-configured to support Cloudflare as one of its DDNS providers.
- Create a new Cloudflare Worker
- 'Quick Edit' the worker within your browser.
- Copy and paste the contents of index.js into the code editor for your worker. Ensure that you are replacing any boilerplate/code that is currently there.
- Once you have created the worker, take note of it's *.workers.dev route. More on routes for Cloudflare Workers here.
- Create an API token so the Worker can update your DNS records. Go to https://dash.cloudflare.com/profile/api-tokens and select "Create custom token". Enable permissions for both Zone:Read and DNS:Edit. Copy your API Key - you will need it later when configuring your UniFi OS Controller.
- Log on to your UniFi OS Controller
- Navigate to Settings > Internet > WAN and scroll down to Dynamic DNS.
- Click Create New Dynamic DNS and enter the following information:
Service: choose any service from the drop-down menuHostname: the full subdomain and hostname of the record you want to update (e.g.subdomain.mydomain.com)Username: the domain name containing the record (e.g.mydomain.com)Password: the Cloudflare API Token you created earlierServer: the Cloudflare Worker routeddns.<worker-subdomain>.workers.dev/update?hostname=%h&ip=%i
- inadyn is an open-source application that supports different dynamic DNS providers. It's used by UniFi OS under-the-hood to update your public IP address.
- inadyn-cloudflare much of the code for this project is taken from blackjid's project.
- Cloudflare Workers Basic Auth Example