Subscribing to Scanning
In addition to the subscription vendors already mentioned namely, Security Space, HackerWhacker, Internet Security Systems, and Symantec Corporation numerous other vendors offer security scans and other services by subscription or on a pay-as-you-go basis. Other noteworthy vendors in this space include the following:
eSecurity online offers a variety of risk management services, including regular security scans.
Guardent offers all kinds of security services, including vulnerability assessments and prescriptions to deal with whatever they find.
Metases offers a broad range of security services. In addition, it will not only assess your security posture, but also help your organization manage its security.
RedSiren Technologies offers its 1stWatch services to asses and monitor security matters, including deployment of security tools and related management services.
Ubizen's OnlineGuardian offers real-time security monitoring and management services.
In establishing a relationship with a security scanning service, it will be tempting to delegate other aspects of security to such service providers. In that case, the adage about putting all one's eggs in a single basket, and then watching that basket "very, very carefully" are worth remembering.