I am one of the users Rafi is talking about, I modified my port selection as Qwest (west coast isp for dsl-dialup, part of the baby bell's "us west") has been and will continue to block bit torrent. So after a lot of trial and error I started using microsofts DNS port range or lower for my torrent traffic and my speeds improved (protocol encryption enabled of course) as I see it blocking DNS could lead to a very big lawsuit for Qwest. and so far it has been working for me for the last 3 years. my Idea would be to just block port 80 (the webserver port) as its the webservers getting hit with a ddos attack thats the worry. as I see it the developers are using a huge brush to paint over a tiny hole (and cover over the fact that its the DHT protocol that is the problem and needs to be reworked as pointed to by Ultima in post #186 "work around exploits" http://torrentfreak.com/bottorrent-using-bittorrent-as-a-ddos-tool-101229/ , Quote "Astro says that since it's a design error, the [DHT] protocol has to be redefined eventually" this will still cause problems for those who need to use port 80 as their isp only wants them to surf the web