For your own and on a constant basis - WhatsUp Gold. For quick checks nmap of which there is now an NT version: http://www.eeye.com/html/Research/Tools/nmapNT.html <tip> Other Open Source UnixToNT ported tools: http://security.oreilly.com/news/securingnt2_1200.html </tip> Thanks, Ron White >What tools do you all recommend for checking your servers?