Several days ago I noticed that several Comcast / Xfinity residential internet connections throughout the Southeastern US were unable to download or upload torrents. I have a hunch that Comcast implemented a new manner of filtering for customers in my area with the intent of stamping out P2P traffic, however I am not certain if this is the case yet, so I am holding off on a tirade about the friendly neighborhood corporatist internet monopoly for now. I'm interested to know if any other P2P users have encountered similar issues - if so, I hope this post can help. The torrent client used for file sharing on these connections was qbittorrent, and listened for incoming connections using a random TCP port assignment that changed each time the client was restarted. Outbound connections used something in the high range on the local side (e.g. TCP port 59999) while on the remote side the port would also be random. It was possible to establish a connection to...