The following is the GNU All-permissive License as recommended in https://www.gnu.org/licenses/license-recommendations.en.html

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without any warranty.

Contributions are welcome. See https://savannah.gnu.org/maintenance/fsf/.

Privoxy

Website - Doc - Source (GPL-2.0-or-later)

"Privoxy is a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk. Privoxy has a flexible configuration and can be customized to suit individual needs and tastes. It has application for both stand-alone systems and multi-user networks."

We use Privoxy on serverproxy0p.fsf.org to filter outbound traffic on our servers.

Configuration

Configuration files are located in the /etc/privoxy/ directory.