Is My ISP Throttling BitTorrent? Test Your Connection Online

[Jorge]

Research institute creates a BitTorrent-like transfer between your machine and its server, and determines whether or not your ISP is limiting such traffic.
By now surely everyone is aware of how Comcast had been throttling BitTorrent connection speeds as part of its network traffic management program. It was only recently that it announced in a joint statement that it would collaborate with BitTorrent Inc. to develop practices that are "protocol agnostic"
In any case, determining whether or not your ISP is throttling BitTorrent traffic is important in order to determine either what steps you must take to circumvent it perhaps even to change to a different file-sharing protocol if problems persist.
It's with this consideration that researchers at the Max Planck Institute for Software Systems has developed an online test to show whether or not your ISP is throttling or blocking your BitTorrent traffic.

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[Sparky9]

i have comcast and it passed :)

[rainbowdemon]

We are sorry. Our measurement servers are currently busy. Please try again later.

[frodo1956]

hmm i ran a full test says no indication of bit torrent throttling on port 6881/4711. cant figure out why my uploads are practicly nonexistent. cant seed a 700mb file to maybe 100mb.