http://blogs.technet.com/steve_lamb/archive/2008/03/31/i-m-a-developer-how-can-i-integrate-my-application-with-nap.aspxThere's a great article on MSDN titled simply Network Access Protection which explains how you can integrate your application with Microsoft's Network Access Protection(NAP). Why would you want to do this? Well NAP is a core networking feature of Windowsen-GBCommunityServer 2.1 SP1 (Build: 61025.2)