Installation guide

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Managed
A “Managed” scanner is one that is managed by SecurityCenter. Managed scanners are logged into using Nessus admin
credentials, and SecurityCenter has the ability to send plugin updates to the scanner. SecurityCenter also maintains the
Activation Code for Managed scanners.
Unmanaged
An “Unmanaged” scanner is one that has been logged into using a standard Nessus user’s credentials. This scanner may
be used to perform a scan but SecurityCenter cannot send plugin updates to an unmanaged scanner or manage its
Activation Code.
Perimeter Service
SecurityCenter may also use a “Perimeter Service” scanner to perform scans using Tenable’s Perimeter Service. This is
a vulnerability scanning service that may be used to audit Internet facing IP addresses for both network and web
application vulnerabilities “from the cloud”. The Perimeter Service is also considered to be an unmanaged scanner, and
SecurityCenter will not push plugin updates to a Perimeter Service scanner. More information about using the Perimeter
Service through SecurityCenter is found in the Nessus Perimeter Service Scanners section of this document.
In the examples below, the Nessus scanners are installed on remote systems, are of varying types, and are functioning
properly.
Adding a Nessus Scanner
To add a scanner, click the “Add” button. A screen capture of the “Add Scanner” dialog is shown below: