cloudflare-ddns

Cloudflare DDNS for QNAP and Synology NAS and other Linux systems. Based on Cloudflare Worker or other Serverless functions.

With this small but nice interface, it is possible to host your own api to use Cloudflare domains for your DynDNS on QNAP or Synology NAS systems

The API responds with JSON and matching status codes for QNAP and Synology systems

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Required information:

• Cloudflare Account email
• Cloudflare Global API Key (not Origin CA Key)
• Cloudflare registered domain (like example.com)
• DNS Record (like my-ddns.example.com)

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Cloudflare Worker

Setup

1. Go to Cloudflare Workers and create a new Worker
2. Copy the content of worker.js into the editor
3. Click Save and Deploy

Usage

DynDNS for QNAP NAS

Network- and Virtual Switch -> DDNS -> Add -> Select DNS server: Customized

• Username: Your Cloudflare Account email
• Password: Your Cloudflare Global API Key
• Hostname: Your DNS Record (like my-ddns.example.com)
• URL: Tell your QNAP how to assemble the URL (see below)

https://your.cloudflare.worker.host/route/to/worker?email=%USER%&api_key=%PASS%&record=%HOST%&ip=%IP%&ttl=120

if you use cloudfare worker default host. the route is \

DynDNS for Synology NAS

System Controls -> External Access -> Customize

System Controls -> External Access -> Add

https://your.cloudflare.worker.host/route/to/worker?email=__USERNAME__&api_key=__PASSWORD__&record=__HOSTNAME__&ip=__MYIP__&ttl=120

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DynDNS for Linux

cURL Command

curl 'https://your.cloudflare.worker.host/route/to/worker?email=cloudflare@email.com&api_key=XXXX&record=my-ddns.example.com&ip=$(curl -s https://ipinfo.io/ip)&ttl=120'

Cronjob every 5 minutes

*/5 * * * * curl 'https://your.cloudflare.worker.host/route/to/worker?email=cloudflare@email.com&api_key=XXXX&record=my-ddns.example.com&ip=$(curl -s https://ipinfo.io/ip)&ttl=120' >/dev/null 2>&1

To get your public IP address you can use the following cURL command:

curl https://ipinfo.io/ip

TODO

• Add support for custom DNS settings like proxied or auto_ttl
• Add support for automatic SSL certificate renewal

License

MIT

Credits

This project is inspire by fbrettnich/cloudflare-dyndns-php. We ported the PHP code to Cloudflare Worker to make it more scalable and easier to use.