Volevo segnalare questo fantastico script, che installa in automatico tutte le versioni più recenti dei sistemi di Firewall, Antiflood e altro ancora.
Dal sito di Server Monkeys :

Install RKHunter
Install RKHunter Cronjob which emails a user-set email address nightly
Install/update APF
Add SM/TP monitoring IPs (view information on these in Orbit)
Install/update BFD
Install CHKROOTKIT
Install CHKROOTKIT Cronjob which emails a user-set email address nightly
Disable Telnet
Force SSH Protocol 2
Secure /tmp
Secure /var/tmp
Secure /dev/shm
Install/update Zend Optimizer
Install/update eAccelerator
MySQL 4.0 and 4.1 Configuration Optimization (cPanel only)
Upgrade MySQL to 4.1 (cPanel only)
Tweak WHM Settings for security and stability
Configure RNDC if not …