"There are a number of security scanners out there.
Most of them are vendor specific, and each boasts a number of
vulnerability checks to determine what is secure on your system and
what is not. So what if you are a hardcore open source paranoid
like myself who wouldn't think to spend a dime on the latest
commercial security scanner from CyberSlueths or CrackerCops? Well
there is a superior alternative that is regularly updated, free,
and open source. It's called Nessus, and it is by far the best
Some of the products that appear on this site are from companies from which QuinStreet receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. QuinStreet does not include all companies or all types of products available in the marketplace.