Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!wang!fitz From: fitz@wang.com (Tom Fitzgerald) Newsgroups: comp.protocols.tcp-ip Subject: Re: copy protection Message-ID: Date: 8 Feb 91 01:30:20 GMT References: <9102061621.AA11846@ftp.com> Organization: Wang Labs, Lowell MA, USA Lines: 19 > You need to just look at the format of the udp packets, broadcast the > same serial numbers from your own ip address, and that should have the > desired effect of making you extremely unpopular. jbvb@FTP.COM (James B. Van Bokkelen) writes: > The big question is whether 'cpd' checks the source IP address - if it > doesn't (and the check would have to be complicated due to 0 vs. 1 and > subnet issues), then you can do this from anywhere in the Internet... ??? Isn't it possible to forge the source IP address to be a random node on the same subnet as the victim? The destination certainly won't be sending any responses back.... On the other hand, don't most routers across the Internet disable directed broadcasts? --- Tom Fitzgerald Wang Labs fitz@wang.com 1-508-967-5278 Lowell MA, USA ...!uunet!wang!fitz