[LinuxUsers] Securing an Ubuntu LTS 8.04 Server Edition

[Ragi Y. Burhum]

Do any of you have a sort of checklist that you go over or reference guide
(self made or available somewhere) that you use when you are going to put an
Ubuntu Server live to the evil Internet?

I am looking for something more specific than "close the ports that you are
not using" or "uninstall the stuff you don't need". "Maybe something like
sendmail is on by default. Take it out" or "chmod this file and that file
for x reason." "Use so and so package to monitor for weird activities and so
on and so forth"

My Ubuntu system is working perfectly now (it has all the stuff I need)... I
just need to make sure that a portscanner and some brute force crap will not
take it out within 5 minutes of putting it live :)

Recommendations?

- Ragi
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