This is a DynDNS Service that can be used to update the IP address of a Fritz!Box to a Cloudflare DNS record. It supports updates of A- and AAAA-records. Every time your IP Address changes the service will be called by your Fritz!Box and the IP address will be updated.
✅ Key features: 1️⃣ Automatic Cloudflare DNS updates 🔄 2️⃣ Effortless deployment on Vercel with One-Click 🚀 3️⃣ Powered by Nuxt.js 🎨 4️⃣ Open-source for community collaboration 🌍 5️⃣ Supports both IPv4 and IPv6 6️⃣ Utilizes DNS A-Records and AAAA-Records instead of CNAME-Records (e.g., via Fritz.net) 7️⃣ Runs on the cloud in a serverless environment (vercel / cloudflare)
Create a Cloudflare API token with read permissions for the scope Zone.Zone and edit permissions for the scope Zone.DNS.
Create an A- and AAAA-record for your domain in Cloudflare. The A-record should point to your IPv4 address and the AAAA-record should point to your IPv6 address.
Set the TTL of each Record to 1 minute. The Service will only update existing records. It will not delete or create new records, to avoid polluting your DNS zone in case of a configuration error.
The A-Record will be used to update your FRtIZ!Box IPv4 address in Cloudflare DNS. To create this record use a random IP Address and make sure the proxy is disabled and the TTL is set to 1 minute. After the configuration of your FRITZ!Box is done the record should be updated with your current IPv4 address.
The AAAA-Record will be used to update your FRtIZ!Box IPv6 address in Cloudflare DNS. To create this record use a random IP Address for example 2001:0db8:85a3:0000:0000:8a2e:0370:7334 and make sure the proxy is disabled and the TTL is set to 1 minute. After the configuration of your FRITZ!Box is done the record should be updated with your current IPv6 address.
Deploy this project to your Cloudflare account and use it as a service for your FRITZ!Box. Adjust the environment variables in the .env file to match your Cloudflare account and routing patterns.
cp .env.example .env
pnpm build:cf
pnpm deploy:cfIf nessesary make some adjustments to nuxt.config.ts to match your Cloudflare account and routing patterns. (see the nitro preset config in the nuxt.config.ts file)
Deploy this project to your Vercel account and use it as a service for your FRITZ!Box.
If you don't want to host "FRITZ!Box Cloudflare DynDNS" yourself, feel free to use my cloud service. Just use this Update URL in your FRITZ!Box: This service is provided for free and without any warranty. Since this service is provided for free, I can't guarantee that it will always be available. If you need a more reliable service, please consider self-hosting.
Please note that this option is not secure due to the fact that the API token is visible in the URL. Although cloudflare REDACTS the API token in the logs it is still possible to get your API token by inspecting the network traffic. If you need a more secure option, please consider self-hosting.
https://fritzdns.piscis.dev/api/fritz-dyndns/?token=<pass>&record=fritz.example.com&zone=example.com&ipv4=<ipaddr>&ipv6=<ip6addr>
| FRITZ!Box Setting | Value | Description |
|---|---|---|
| Update URL | https://fritzdns.piscis.dev/api/fritz-dyndns/?token=<pass>&record=fritz.example.com&zone=example.com&ipv4=<ipaddr>&ipv6=<ip6addr> |
Replace the URL parameter record and zone with your domain name. If required you can omit either the ipv4 or ipv6 URL parameter. |
| Domain Name | fritz.example.com | The FQDN from the URL parameter record and zone. |
| Username | admin | You can choose whatever value you want. |
| Password | ●●●●●● | The API token you’ve created earlier. |
Please note, if you use a custom Vercel deployment your service URL will be different. For example, if you're app is deployed to https://some-random-name.vercel.app/ you have to use the following URL: https://some-random-name.vercel.app/api/fritz-dyndns/?token=<pass>&record=fritz.example.com&zone=example.com&ipv4=<ipaddr>&ipv6=<ip6addr> service endpoint when configuring your FITZ!Box DynDNS settings
You can test the api by going to the test page at `http://localhost:3000/api/` or visit `https://fritzdns.piscis.dev/api/`.
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## Development
### Prerequisites for Development
- NodeJS 22+
- PNPM
### Setup
Make sure to install the dependencies:
```bash
# Install dependencies via pnpm
pnpm install
Start the development server on http://localhost:3000
# Run development server
pnpm devBuild the production application:
# Run production build
pnpm buildLocally preview production build:
# Run production build locally
pnpm previewCheck out the deployment documentation for more information.
- Look at the Nuxt 4 documentation to learn more.
Original port for Vercel from: https://github.com/L480/cloudflare-dyndns
- A couple more tests for the API part
- Add more e2e tests for error handling on the frontend