My dedicated server has been having some problems lately, mainly due to high load.
Here are some things I’ve done, just to keep track of things.
Security Bundle from rfxnetworks
Installed MRTG ( http://directadmin.com/forum/showthread.php?s=&threadid=632 ) to monitor usage
Now working on: mmcache ( http://directadmin.com/forum/showthread.php?s=&threadid=3900 )