Comment Comment by TazeTSchnitzel Microsoft does something similar: http://technet.microsoft.com/en-us/library/cc766017%28WS.10%...They request http://www.msftncsi.com/ncsi.txt and check the DNS of msftncsi.com parent TazeTSchnitzel 14 years ago
They request http://www.msftncsi.com/ncsi.txt and check the DNS of msftncsi.com