How to restart or shutdown remote machine
If you can ping this machine from other computer and you have administrators rights on that machine you may use windows utility.
On a computer that has connection to the server which needs to be restarted or shutdown go to Start -> Run and type shutdown -i
This window will show up. Press Add and type either IP or DNS of remote server.
Select shutdown or restart and press OK. That 's it. For your convenience you may run from command line constant ping (ping server-name -t) when the server actually stopped to respond to ping's and when it started again.
Alternatively you can go to command prompt (start -> run -> cmd) on your workstation and Type
shutdown -r -m \\x.x.x.x
Replace x.x.x.x with the IP address or computer name of the remote machine. -r option is for restart, don't use -r if want to just shut down the system.