Are you installing this on or a virtual machine ?
en_windows_server_2008_r2_with_sp1_x64_dvd_617601.iso SHA-1 Hash: D3FD73A17039AD493863489851722888D905ED8D Installation and Setup Tips windows server 2008 r2 standard iso
Place the server on a restricted network segment with strict firewall rules. Are you installing this on or a virtual machine