Dynamic DNS Client for CloudFlare written in Python

Unless you have a static public IP address, this is probably the most reliable way to ensure your servers are always accessible to you over the Internet.

• Supports IPv4 and IPv6 records (A, AAAA)
• Supports multiple domains with multiple hosts per domain
• Simultaneous IPv4 and IPv6 support for single host
• No third party libraries used. Only standard python libs.
• Works with Python 2 and 3
• Designed to run on any OS that supports Python (i.e. not dependent on any OS specific tools)
• Only makes changes to CloudFlare's zone files when necessary. Stores last IP address of each host in config file.
• Simple JSON config file
• Automatically collects and saves the zone and host IDs if missing.

{
 "domains": [
  {
   "hosts": [
    {
     "id": "", 
     "ipv4": "", 
     "ipv6": "", 
     "name": "HOST_NAME_HERE e.g. www", 
     "types": ["A"]
    }
   ], 
   "id": "", 
   "name": "DOMAIN_NAME_HERE e.g. myserver.com"
  }
 ], 
 "user": {
  "api_key": "CLOUDFLARE_API_KEY_HERE", 
  "email": "CLOUDFLARE_EMAIL_HERE"
 }
}

1. Download and place the cf-ddns.py and cf-ddns.conf files somewhere on your server (e.g. /usr/local/bin/ or ~/).
2. Open the cf-ddns.conf file in a text editor and specify your email address, API key, domain name, and host name. The record type is set to A by default. Change it to AAAA or add AAAA to the list if necessary.
3. Set +x permission to the script for your user by running chmod +x /PATH_TO_FILE/cf-ddns.py
4. Run crontab -e and append this line to it: */5 * * * * /PATH_TO_FILE/cf-ddns.py >/dev/null 2>&1. be sure to change the path to match your setup.
5. That's it :)

• New features and code improvements are welcomed
• If you find a bug please create a GitHub issue for it