CFDNS

Dynamic server DNS backed by cloudflare

Why?

If you run a server without a static IP address (e.g. at home), it can be cumbersome or expensive to keep a domain name updated with the latest IP that has been assigned to you.

Compatible with a free Cloudflare account, this script can keep you updated and online

How?

This will be written from the perspective of someone running a server in their house with a residential intenret connection backed by a provider such as Virgin media.

1. In your DHCP settings, assign a static IP address to the machine that should serve requests
2. With UPnP, port forward the relevant ports for access. This may be 80 and 22 for standard HTTP and SSH access
3. git clone this script to a target directory
4. npm install the dependencies
5. cp config.example.json config.json and fill in the relevant details.
   1. The zone_id can be found by going to the cloudflare dashboard and looking at the overview for a given domain. On the right hand side are a series of settings - see 1
   2. Create an API token for the application. The link to do so (2) is located just underneath the Zone ID. The token only needs edit permissions on the Zone DNS
6. Set up a cron (or other scheduling option) to invoke the script at regular intervals