Con l’articolo riguardante Doudou Linux ho scoperto questo software per filtrare i contenuti delle pagine Web: Dans Guardian. DansGuardian è un software per filtraggio dei contenuti sul web concepito per operare come servizio accessorio del proxy Squid su piattaforme Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, HP-UX e Solaris.

This tutorial will demonstrate how to set up a Squid Proxy server on Ubuntu 9.04 Server with DansGuardian (for content filtering) and ClamAV (for Virus scanning); in addition, we will set up Web Proxy AutoDetection (WPAD) through DHCP (in this case, the Windows Server 2003 DHCP server) or DNS so that the only configuration necessary on the client side is to check "Auto-detect proxy settings for this network" in Firefox or Internet Explorer. At the end of the tutorial, users will have a fully functional and secure proxy for HTTP access.

This how-to describes how to install and configure Dansguardian with multi-group filtering, Squid with NTLM auth, ipmasq, and dnsmasq to provide a full internet gateway solution for small to medium sized networks. This how-to requires two NICs in order to perform firewalling and transparent proxying.