Newsgroups: news.software.b
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Cnews and the cancel control command
Message-ID: <1991Feb7.164652.8121@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <1991Feb4.002104.12830@wolves.uucp> <1991Feb4.185130.6956@zoo.toronto.edu> <1991Feb6.221123.23610@gjetor.geac.COM>
Date: Thu, 7 Feb 1991 16:46:52 GMT

In article <1991Feb6.221123.23610@gjetor.geac.COM> adeboer@gjetor.geac.COM (Anthony DeBoer) writes:
>Maybe I'm all wet, but what about using the Paths: header?  Ignore the cancel
>message if the path of the cancel doesn't match the path of the original
>article...

This is much worse than using the From: line, which is the official method.
News propagation is not the orderly tree structure that some people envision.
Usenet is full of loops and redundancy, and it's not uncommon for sites to
get their news by two or more paths.

Given favorable circumstances, like a naive NNTP site along the route, it
is also possible to forge Path:.
-- 
"Maybe we should tell the truth?"      | Henry Spencer at U of Toronto Zoology
"Surely we aren't that desperate yet." |  henry@zoo.toronto.edu   utzoo!henry
