How to lock the computer in the absence of the Internet?

Question

System administration

Radmin Server is installed on the computer and the user pulls out the ethernet cable to avoid control. It is necessary that the computer is blocked when there is no connection and unlocked when it appears.

Answer 1

Something like this:
ping 8.8.8.8 -n 1
if errorlevel 1 goto lock
goto end
:lock
@rundll32 user32.dll,LockWorkStation
:end
to the scheduler every minute

Answer 2

plug in wifi and turn off the right to turn it off

Answer 3

It will be easier to solve administrative methods. If a typical office grid is to acquaint the user with the order that as soon as his computer ceases to be monitored, from that moment on he will no longer be paid. To reinforce the actions from the technical side - put some kind of SMP, LanAgent, StaffCop.