Dynamic DNS with Cloudflare - Python Script

cloudflare_dynamic_dns.py

#!/usr/bin/python

# Set up a new A record in Cloudflare, add the details of it along with your account details below
# Make sure this script runs on startup (or whenever you get a new IP...)
#
# @author Aaron Rice <aaron@duedil.com>


import urllib
import json
import sys

try:
  new_ip = urllib.urlopen("http://my-ip.heroku.com/").read()
except:
  print "Error getting IP"
  sys.exit()

# Put your Cloudflare settings here.
# The host must be an A record that already exists in cloudflare
data = {
  "a"     : "DIUP",
  "tkn"   : "API_TOKEN_HERE",
  "u"     : "CLOUDFLARE_EMAIL_HERE",
  "ip"    : new_ip.strip(),
  "z"     : "DOMAIN_HERE",
  "hosts" : "DNSNAME.DOMAIN_HERE",
}

try:
  dns_response = json.loads(urllib.urlopen("https://www.cloudflare.com/api_json.html", urllib.urlencode(data)).read())
  if dns_response[u'result'] == "success":
    print "IP updated to " + new_ip,
  else:
    print "Error Setting IP"
except:
  print "Error with cloudflare API"

Hi Riceo,

May i ask what this script is, how it works ?

I'm trying to get cloudflare to work with my dynamic dns service for my website which uses no-ip.info

Does your script somehow make this possible ?

Hi,

Sorry I haven't responded sooner - I had no idea you commented.

This was a quick hack for dynamic DNS via Cloudflare. If you run it as a cronjob on your server it will use the Cloudflare API to update your server's current public IP adress for the specified DNS entry on Cloudflare.

The change should only take a few minutes max to propagate.

I wouldn't trust it in a production environment, but it should work fine for testing / dev.

Let me know if you have any problems, and feel free to email me if I don't respond quick enough here!

Cheers,
Aaron

Hey! I made a script similar to this, but it can update several hosts (like example.com and www.example.com).

Check it out here: https://github.com/TTSDA/CfDDNS

@ttsda nice!

seems like parameters are changed now...

I'd imagine so!