The open sourced Squid Proxy software, in conjunction with Active Directory, will allow you to control and report on Internet access by your users. The software can block access to websites (Facebook for example). The solution integrates with Active Directory for user information, blocking sites you specify and tracking what sites the users access.
Modern Computer Service, Inc. supports Squid in this configuration.. MCS, Inc. can install Squid for your organization, or maintain it's existing Squid installation.
Use the Contact page to learn more.