Nessus is no longer free unless you are just going to use it on your home network.
"Commercial organizations that use the Nessus vulnerability scanner must purchase a ProfessionalFeed subscription to scan their network, obtain support, updates to their database of vulnerability checks and compliance auditing. Each ProfessionalFeed costs $1,200 per year per Nessus scanner and can be purchased from Tenable's ProfessionalFeed Partners or directly from Tenable's E-commerce site." -----Original Message----- From: Kurt Buff [mailto:kurt.b...@gmail.com] Sent: Wednesday, February 10, 2010 1:00 PM To: NT System Admin Issues Subject: Re: Penetration Testing Nessus, OpenVAS and a whole host of other tools. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~