We have 100 computers in LAN. We have bsnl dataone connection (Siemens sl2_141 is provided by BSNL) for internet. I want to block some ports in our BSNL sl2_141 router to prevent the users to download files from torrents. How to do this. Please advice. Is there any alternet solution to prevent the users from downloading using torrents (other then grant user privilege to each computer)