i am new to pi, and i use it as webserver. but every time i dc from ssh, after few hour connect again, pi reject my connect, even use vnc or ssh. what i can do is unplug my power to manual reboot. (truly hurt...)
and my pi using Ethernet network (just beside router), so i am sure not wifi power safe feature cause it. also, my pi haven't plug any usb stick and using 32gb micro sd card as system disk. last, i am using 2v power with plug.
i google for this problem, and try to ping some website every 15min to keep network active, but unlucky, it's fail to save my pi.
i wish i got a solution from you guys, thanks and please forgive my broken english :D
Update : i am using Pi2 and run with Raspbian Jessie, using LAMP as webserver