Cloudflare DNS updater from DDNS services

Dyn-Cloudflare-DDNS is a simple Python 3.12.x script that retrieves an IP address from a Dynamic DNS provider (Dyn, No-IP, etc) and uses that to update Cloudflare's DNS. The reason for this script is that many routers have the capability to update DDNS services, but usually Cloudflare isn't supported.

In order for this script to work, you need to have an account with a Dynamic DNS provider and an account with Cloudflare.

This script uses Poetry and depends on Cloudflare and DNSPython.

Installation

$ poetry install

Environment Variables

This script uses environment variables for its configuration

Variable	Required	Description
CF_ZONE	Yes	Cloudflare Zone to be updated
DDNS_HOST	Yes	Dynamic Hostname where the IP will be retrieved from
CF_API_KEY	Yes	Cloudflare API Key (v4)
DDNS_RTYPE	No	DNS Record Type (Only A or AAAA)

Running

Standalone

$ poetry run python3 dyn-cloudflare-ddns

Inside Docker

docker run -e CF_API_KEY='<CF_KEY>' -e DDNS_HOST='<DDNS_HOST>' -e CF_ZONE='<CF_ZONE>' -d --name dyn-cloudflare-ddns ghcr.io/codegeek/dyn-cloudflare-ddns