I want to ask that how could i block torrent or bittorent downloading amongst the users connected with my dsl modem. I have mikrotik router rb750 but dont know how to block. please help me. and also i want to block for others users if i increases my dsl connection from 5 users to more.
instead of blocking, manage it. For this to work your modem has to be in bridge mode and your RB doing all the work.
First set as i said with the RB in between, do the initial home internet set up and basic securing of denying input from WAN.
Than mark all torrent packets going into forward chain (prerouting) and unmark packets going out of forward chain (post routing).
Do the same but with a different mark for all other packets
Create a que that uses the torrent marked packets and torrent protocol and set priority to lower and set target bandwidth to low and max bandwidth to your internet speed.
Create another que that uses the rest of the marked packets and set to higher with better target bandwidth.
Unfortunately i lost my que settings when my RB450G needed a reset and wouldnt boot with any backup configs so i cant give you a clear picture. There is a wiki article on this but i refined my settings based on that.
With this torrent traffic will not slow things down or hang your modem from it having to do all the NAT.