🚀 Simple dynamic DNS update script for Cloudflare

Access your home network through your own domain without a static IP!

On most Linux versions, you just have to run the script; there is no need to install anything. The script should be executed periodically by a cronjob.

If your public IP has changed since the last run, your Cloudflare A record will be updated.
Connections to the Cloudflare API are only made if the record has to be updated.

Features:

---

• works with Zone API Tokens; no need to use your global API key
• receive updates via Telegram notifications
• easy configuration
• fast and lightweight
• quick access to your IP history

Quick start

---

Whole walkthrough with screenshots is coming soon!

• create an Cloudflare API token (CF Documentation)
• find your Zone ID (CF Documentation)
• create your A record on the CF Webinterface (doesn't matter where it points to)
• (Optional) create Telegram Bot; contact Botfather with /newbot and follow the instructions
• (Optional) send a message to @userinfobot to get your chat ID
• copy the dyndns.sh script and edit the variables
• make it executable with chmod +x dyndns.sh
• add a cronjob with crontab -e

  */5 * * * * /path/to/script/dyndns.sh > /dev/null 2>&1
  

  This cronjob will execute the script every 5 minutes.

Privacy:

• it uses icanhazip.com to get your public IP; this service is also operated by Cloudflare (source)
• if you choose to use telegram notifications, the script will connect to the Telegram API