In the light of the guide's section "mod_perl for ISPs" http://perl.apache.org/guide/multiuser.html There is a new project called: The User-mode Linux Kernel http://user-mode-linux.sourceforge.net/ <Quote> User-Mode Linux is a safe, secure way of running Linux versions and Linux processes. Run buggy software, experiment with new Linux kernels or distributions, and poke around in the internals of Linux, all without risking your main Linux setup. User-Mode Linux gives you a virtual machine that may have more hardware and software virtual resources than your actual, physical computer. Disk storage for the virtual machine is entirely contained inside a single file on your physical machine. You can assign your virtual machine only the hardware access you want it to have. With properly limited access, nothing you do on the virtual machine can change or damage your real computer, or its software. </Quote> So if you want to completely protect one user from another and yourself from your users this might be yet another alternative to other proposed solutions at: http://perl.apache.org/guide/multiuser.html This reminds me IBM's mainframe virtual machines, but now you don't need to own a mainframe to be able to do have the same. _____________________________________________________________________ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://apachetoday.com http://jazzvalley.com http://singlesheaven.com http://perlmonth.com perl.org apache.org