my mac loses connection

Hi,
my mac started itself to lose ethernet connection when i go away for 10 mins or more.
When i come back it gets connection if i move the mouse only.

I can't find where to set options or how to fix this issue.
Can you help me please ?

thx

it's because your computer is asleep clearly.
you move your mouse waking up your computer and therefor reconnecting to the internet.
It would be sweet if someone knew a way to make it so when your computer goes to sleep it dosen't disconnect from the internet.

Look in System Preferences -> Energy Saver. You can tell it never to sleep the computer or turn the hard drives off in there.