Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cornell!murthy
From: murthy@algron.cs.cornell.edu (Chet Murthy)
Newsgroups: comp.unix.wizards
Subject: Re: tftp acces restrictions
Message-ID: <44309@cornell.UUCP>
Date: 8 Aug 90 22:05:14 GMT
References: <2369@east.East.Sun.COM>
Sender: nobody@cornell.UUCP
Organization: Cornell Univ. CS Dept. Ithaca NY
Lines: 14
Keywords: tftp

yaturner@tempone.Sun.COM (Jim Turner) writes:

>Is there a way to control access to a machine from tftp, that is can I
>prevent people from accessing
>my files via tftp ???

Yes - write a program that chroots itself into a subdirectory, and
then exec's another program, setuid-ing first.  This other program
must be in the subdirectory, but at that point, unless the other
program can delete directories, I think there is no way for it to get
out of the subdirectory.

--chet--