I use the Internet is a school of broadband, dsl internet (I do not know the specific network settings)
FIG normal Internet Network Control Panel: 
, one can see a DSL connection.
Because sometimes off the network after a variety of reasons, unable to reconnect. At this point in the panel "Enable Networking" check mark in front gone, just another click "Enable Networking", it will be saved automatically connect to a DSL connection (if not, you can manually click).