9416f643_Network_Security__Description_and_exceptions
Peer-to-peer file sharing The entire Internet in most cases. [Description and exceptions] 
Peer-to-peer file sharing services such as Napster, Kazaa, Grokster, Gnutella, Limewire, and Bittorrent may not work in their default configurations. Most of these programs offer workarounds for dealing with a firewall. Please be aware that peer-to-peer file sharing programs are notorious vectors for hacker compromises of computers. Distribution sites for the programs themselves and files that are distributed are often "contaminated" by hackers with their own malicious programs, that "ride along" and infect your computer while you are downloading files. In addition, these peer-to-peer file sharing programs often expose files on your computer, including those containing identity information, to anyone on the internet. Peer-to-peer file sharing programs should never be installed on Stanford-owned computers and you are strongly discouraged from using them on personally owned computers.
Network Security
Description and exceptions