i am not a networking pro. my network admin wants to know the ways we can monitor internet usage by employees. my office systems have mostly ubuntu 12.04/14.04 and some windows 7 pcs. can i find a monitoring application which supports both win7 and ubuntu. i found few [here][1]here which has only linux support. we are using wifi and LAN connection using 3 routers. is there any application to install in every system? or at router level is there any way to configure such monitoring? [1]: http://sourceforge.net/projects/etherape/files/