LinuxSA Mailing list archives

  From: David Newall <davidn@rebel.net.au>
  To  : Toby Corkindale <tjcorkin@steadycom.com.au>
  Date: Wed, 14 Apr 1999 18:30:24 +0930 (CST)

Re: FTP permissions

On Wed, 14 Apr 1999, Toby Corkindale wrote:
>>> Has anyone set-up ftpaccess to restrict people from going back down the
>>> directory structure?
> or chroot() for that matter.

chroot certainly can be used to restrict people from going back down the
directory structure, but it's a complete pain in the butt.  Remember that
when ftpd chroot's, the meaning of / changes.  Just consider what files
are essential to run any program.  /lib/ld.so, /lib/libc.so, /bin/sh,
/usr/bin/gzip, /bin/ls.  Actually, the list is long and I shan't waste
anyone's time trying for a full enumeration.

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