Don't Sleep Network Connection / VPN If I let my computer sleep my VPN connection seems to die. Mac shows it as still being up, but nothing over the VPN works until I reconnect and disconnect.

I am happy to have a my monitors sleep, but I want my network and VPN connection to stay active.

I'm running Yosemite with a wired connection. Anyone know how I might get this to happen? I'm open to using Caffeine or something like that, but with 3x 30 inch monitors my power bill will suck if I don't let them sleep (and turning them off is annoying because all my windows get rearranged).
Just put your displays to sleep in the energy saver settings (like in the picture below) and it should work.



Please check the answer at serverfault for the reason why the VPN-connections breaks.