Nessus VulnerabilitY Scanner
Am Friday, 17. Feb 2012 im Topic 'Pentest'
The Nessus vulnerability scanner is available as a stand-alone network scanner, as a subscription service or as a closely integrated scanning component of SecurityCenter.

Download
http://www.nessus.org/products/nessus/nessus-download-agreement

FAQ
http://www.nessus.org/products/nessus/nessus-faq