Overview

The django-cloudflare-restrictor package provides a convient way to restrict access to your application server, such that it will only respond to requests that come via cloudflare's network.

Installation

Install the package from pypi

pip install django-cloudflare-restrictor

Add to INSTALLED APPS in your settings file

INSTALLED_APPS = [
    'django_cloudflare_restrictor',
    ...

And add to MIDDLEWARE in your settings file

MIDDLEWARE = [
    'django_cloudflare_restrictor.middleware.CloudflareRestrictorMiddleware',
    ...
 ]

Set the additional settings as desired

CLOUDFLARE_RESTRICTOR_ENABLED = True
CLOUDFLARE_RESTRICTOR_ADDITIONAL_NETWORKS = ["127.0.0.0/8"]

If you want to confirm that the IP blocks stored in the django-cloudflare-restrictor package are up to date you can use the check_cloudflare_ips command. This will log a warning if the IP addresses are out of date.

python manage.py check_cloudflare_ips

Based on historical evidence, it appears that Cloudflare gives around 1 month's advance notice of IP address changes, by publishing the new addresses in advance on their site. Updates to these lists are very infrequent (approx once per every 2 years)