Cloudflare-DDNS

Simple DynDNS API for Cloudflare for self-hosting | Ideal for QNAP & Synology NAS

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

Required information:

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

DynDNS for QNAP NAS

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

https://api.example.com/cloudflare/ddns.php?email=%USER%&api_key=%PASS%&domain=example.com&record=%HOST%&ip=%IP%&ttl=120

DynDNS for Synology NAS

System Controls -> External Access -> Customize

System Controls -> External Access -> Add

https://api.example.com/cloudflare/ddns.php?email=__USERNAME__&api_key=__PASSWORD__&domain=example.com&record=__HOSTNAME__&ip=__MYIP__&ttl=120

DynDNS for Linux

cURL Command

curl 'https://api.example.com/cloudflare/ddns.php?email=cloudflare@email.com&api_key=XXXX&domain=example.com&record=my-ddns.example.com&ip=1.1.1.1&ttl=120'

Cronjob every 5 minutes

*/5 * * * * curl -s 'https://api.example.com/cloudflare/ddns.php?email=cloudflare@email.com&api_key=XXXX&domain=example.com&record=my-ddns.example.com&ip=1.1.1.1&ttl=120' >/dev/null 2>&1

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

curl https://ipinfo.io/ip