"...once an intruder gets on the server..."

Well, once that happens, you have more pressing issues than just your database server being compromised. This is why a trained, experienced system administrator is required for such critical issues. I myself can write database front ends all day long, but you don't see me playing sysadmin because i do not keep up with security updates as often as i should. Instead, i let my friends maverick or blades handle the sysadmin role - but i do try and pick up whatever tips they throw at me. ;)

Moral of the story: don't let anyone break into your box in the first place.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)