"Keeping a server or workstation updated with the latest security patches can be a daunting task. Compounding the problem is the number of distinct operating systems and hardware in an organization. Nessus, an open source vulnerability scanner, can help with this complex task.
"Nessus is available for both Windows and Unix systems, so you can run vulnerability tests on and from distinct platforms. The application has both a client and a server component, which allows you to execute security assessments flexibly..."