NxFilter

NxFilter is a DNS filtering software. You can filter and monitor Internet activity in your network with NxFilter. It is also capable of detecting and blocking malware and BotNET based on DNS packet inspection. It features Active Directory integration, user or group based policy assignment, dual policy setup for work-time and free-time, quota time, phishing Protection, block by domain categories, unlimited custom categories, unlimited number of user and group creation, embedded webserver and embedded DB, built-in GUI, and internationalized domain name support.