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README.md

Cloudflare Gateway Adblocking

PyPI
Serverless adblocking via Cloudflare Zero Trust Gateway

What is this?

This is a serverless adblocking solution that uses Cloudflare's Zero Trust Gateway to block ads by parsing a hosts file and creating a firewall rule to block the domains. It can be used as an alternative to Pi-Hole or other adblocking solutions.
This project was heavily inspired by this blog post

Prerequisites

  • Python > 3.10
  • A Cloudflare account with Zero Trust enabled
  • A Cloudflare API tolken with the following permissions:
    • Zero Trust: Edit
    • Account Firewall Access Rules: Edit
    • Access: Apps and Policies: Edit
  • A device with the WARP client installed and configured to use a Zero Trust account

Installation

From PyPi

pip install cloudflare-gateway-adblocking

Usage

Setting Cloudflare credentials

Environment variables

The following environment variables can be used to set the Cloudflare credentials:

  • CLOUDFLARE_ACCOUNT_ID
  • CLOUDFLARE_TOKEN
    These can either be set in the environment or in a .env file in the current working directory.

Command line flags

The following command line flags can be used to set the Cloudflare credentials:

  • Cloudflare Account ID: --account-id / -a
  • Cloudflare Token: --token / -t

Passing blocklists

Blocklists can be passed to the program via the command line flag --blocklist / -b. This flag can either point to a hosts file or a directory containing hosts files. If this flag is not passed, the program will look for a file or directory named blocklists in the current working directory.

Passing whitelists

Whitelists can be passed to the program via the command line flag --whitelist / -w. This flag can either point to a hosts file or a directory containing hosts files. If this flag is not passed, then if a file or directory named whitelists exists in the current working directory, it will be used. Domains in this whitelist will be excluded from the blocklists.

Uploading blocklists and creating a firewall policy

To upload the blocklists to Cloudflare and create a firewall policy, use the upload subcommand.
For example:
cloudflare-gateway-adblocking upload

Deleting blocklists and firewall policy

To delete the blocklists from Cloudflare and delete the firewall policy, use the delete subcommand.
For example:
cloudflare-gateway-adblocking delete

Help

For help, use the --help flag.