I am totally newbie to Servers. I'm running a small web based office with having 25 employees. It's been 3 months & i'm watching that my team is sucking up all my internet data in downloading,surfing, updating mobile Apps via WiFi, watching videos etc etc. But, now i'll not sit like a fool & watching all this.
Network Infrastructure :-
I'm having 18 Desktops which are connected via LANcables through a Switch/Hub & than one cable from Switch to my Broadband WiFi modem+router. Likewise ,7 Laptops (that are using WiFi's). I used one spare desktop (having 2 Network Cards) & installed Ubuntu Server 14.04 (after do some goggling).All worked well, like i pluged one LAN cable from Router to Internal network card & than one cable from External network card to the Switch. It is obvious that by doing only this i'll not got what i'm looking for.
What i want :-
1) Need to stop downloading mp3's, videos. 2) Block some sites like, social, porn, torrents etc etc. 3) Stop employees cell phones from using WiFi. 4) Manage all files from server only. 5) Maintaing internet speed.
So, how can i do all those above things, means which proxy server or anything like that to install & how to configure all that ?? . I need full tutorials/links/steps right from starting to end.
Could you please help me out so that i can save some bucks :). Kindly provide me with positive answers.
Thanks in advance & thank you so much to AskUbuntu Community.