Do you have any reference material on security policy that covers pre-release and ongoing periodic scanning of PCs, laptops, servers and Web servers to ensure that the base platform is as secure as it can be and that the host has been checked for common known exposures?
Like any other security policy, a policy on ongoing vulnerability scanning needs to be practical, enforceable and enforced. Keep in mind that vulnerability scans are merely snapshot-in-time views of your current vulnerabilities. Information systems are dynamic, and new vulnerabilities and flaws are discovered practically every day. Given this, make sure that vulnerability scanning is performed on an ongoing basis -- weekly, monthly, quarterly, bi-yearly, etc. depending on your number of users and the complexity of your information systems infrastructure.
A good place to start regarding a policy such as this would be the following SANS sample policies:
Also, section two on security policies in the RFC2196 Site Security Handbook provides some excellent guidelines. See the following URL for more info: http://www.ietf.org/rfc/rfc2196.txt?Number=2196
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