# Go to
http://www.grc.com/default.htm
# Scroll down and click on a link called : SheildsUP!
# On next page, click "Proceed"
# Now, in the obtained page, there is a table named "ShieldsUP!! Services" with various buttons saying "File Sharing, Common Ports, etc etc". Write "6881-6889" in the text box there and Press Enter.
# Wait for scan to complete.
# If any or all the ports are found "closed" in the result, then it means your ISP firewall is restricting you from using those ports. They are closed for you.
You better take a look at
THIS page.
# If they're open, then you need to configure your bittorrent client properly.
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alibi