Hi! First of all: Thanks for your patience and thanks for your pointers for help.
chroot() may not be the ultimate solution for running servers safely, but it seems to raise the bar for crackers quite effectively. For those who are interested: I found quite exactly what I was looking for on http://penguin.epfl.ch/chroot.html For testing purposes I tried what I found there on my system (potato without extensions in this area). It seems that chroot denies service, though. Look at this: ROOT # chroot /bin/ /ls -l chroot: cannot execute /ls: No such file or directory ROOT # cd /bin/ ROOT # /bin/ls -l << Output as expected >> According to the info page and the output of ROOT # chroot --help I can see nothing that I did wrong. ROOT # chroot --version expands to this: chroot (GNU sh-utils) 2.0 Written by Roland McGrath. Copyright (C) 1999 Free Software Foundation, Inc. [WARRANTYBLURB] Have you got any ideas what I'm missing? Thanks in advance, -- Matthias Lampert .^. Graal-Müritzer-Str. 1b || /V\ 22885 Barsbüttel || /( )\ Tel: (040) 670 89 445 || ^^-^^