I just got off the phone with ClearWire Communications, and they confirmed that they DO "manage & monitor" (block) port 6346.

From their Terms of Service: "We may, but do not have to, block information, transmissions or access to certain information, services, products or domains to protect us, our network, the public or our users."


Oh, well as long as they're doing this to "protect" me.

UPDATE: I had a Clearwire technician out to my house, and he stated that as of about 2 weeks ago (around the middle of January) the Eugene office installed a Cisco P-Cube. This is a P2P-blocking piece of hardware that many ISPs are using, and Clearwire is installing at all their offices nationwide to limit file sharing. Information about the P-Cube can be found online, specifically at P-Cubes website: http://www.p-cube.com/products/serviceEngine.shtml