A widely cited example of a violation of net neutrality principles was the Internet service provider Comcast's secret slowing ("throttling") of uploads from peer-to-peer file sharing (P2P) applications by using forged packets. Comcast did not stop blocking these protocols, like BitTorrent, until the Federal Communications Commission ordered them to stop. In another minor example, The Madison River Communications company was fined US$15,000 by the FCC, in 2004, for restricting their customers' access to Vonage, which was rivaling their own services. AT&T was also caught limiting access to FaceTime, so only those users who paid for AT&T's new shared data plans could access the application. In July 2017, Verizon Wireless was accused of throttling after users noticed that videos played on Netflix and YouTube were slower than usual, though Verizon commented that it was conducting "network testing" and that net neutrality rules permit "reasonable network management practices".