Consider the usage of security appliances and software to monitor and ensure that the production environment continues to be secure after the process of server preparation.

Intrusion Detection Systems can be employed to monitor for security sensitive changes in the system and alert personnel. Antivirus scanners can be used to prevent the server(s) from being compromised. Note that, although UNIX like operating systems may have better defenses against viruses (and other malware), consider running antivirus scanners on servers regardless of the OS.