This may be
appropriate for another list, but it seems to me that there's
plenty of applicable knowledge here.
Right now, we're using an older Compaq Deskpro P3-600 box as our incoming
Linux server. Basically, it connects with the DSL modem and contains IP
masquerading, DNS caching, firewall and fetchmail/procmail/qmail tasks
(SpamAssassin included). It runs 24x7 with no problem, as it has for the
last 5 or 6 years. Built like a tank.
Would an offering from one of the various UNIX vendors be a possibility?
Sun / SGI / HP or something? I'm thinking that getting away from any
kind of Intel CPU would be a good place to start, plus of course you
don't need any kind of framebuffer then either (unlike a PC) and can
just use a serial console on the (very rare) occassions when you'd need
to be physically at the machine.
I would suggest the RS/6000 B50.
Peace... Sridhar