Maybe you doesn´t know about this. BRCONNEbla, CT - http://www.brc.com.br
This is an evil software controls network´s access, contents, band allocation and more. Some "specialists" say that is a poor and brute force way to control and limit the traffic and other parameters, and that´s a tool for dumb, lazy (or worse) network administrators.
By the way this monster is blocking TOR. And this is a REAL problem: i can´t access "prohibited" sites. But sex sites are almost free.
If you type in http://www.tumblr.com
you receive a message and bla, bla, bla and the access is denied.
if you type www.bullshitexposed.tumblr.com
""you are in heaven"
or if "you would know what and how to type" some barriers simply DOES NOT EXISTS
Other examples are when you want to make some downloads: for a while, filehippo appears to be ok. Unless you do not try to download more than a few megabytes: If you try to get VMWare Hypervisor or some linux distros you will see things like 3,600 hours or even 14 year for transfer finishing; ok the connection "falls" in less than one our.
These are some samples. I have made various searches arround internet and asked a couple of "specialists" and break my nose, because this unblessed software only appears to be poorly know in Brasil, and the others says "not to know" how to work this ¨%&$%& thing...
How can TOR bypass these trap?