I agree et voilà

Mom--I wonder if they are using CISCO's NBAR filesharing controls http://www.cisco.com/univercd/cc/td/....htm#wp1074479 Look for the parts about "gnutella"

I gather this is built into much of the CISCO equipment ISP's use.

Call them and ask if this is the case. However, good luck finding someone who can answer. Two years ago the help desk at my ISP wasn't aware that the guys who run the equipment were using this stuff, so don't be surprised if the help desk is just as much in the dark as we are.