Every now and then I find myself in this predicament. Someone, somewhere was being naughty and downloaded all seasons of Frasier while on our guest wireless network (i.e. using personal device) and now we got a letter in the mail from the film company which means we need to do something about it. I've played around with NBAR2 protocol-packs in the past with the ISRG2 routers where I could set a policy to drop P2P traffic (including encrypted-bittorrent) and it works well for a while, until it happens again. I am also now finding that the "drop" option is no longer available as part of the 4000 Series routers (IOS-XE) and instead I can apply a whole load of QoS techniques to try and limit this traffic. This seemingly slows and even sometimes stops torrent downloads, for about a minute, until torrents literally take off again.
So I decided to check here and see if anyone else has any new suggestions? Thank you for your time in advance.
