Alienvault 2.3  release notes:

If you plan to implement the 2.3 Installer without an Internet connection,
you can do this by using the  "Unattended" option in the installer (it may
pause for up to 15 minutes while the system check for an Internet
connection) or the "Custom" option which will ask you at the end of the
installation if you want to connect to the Internet to update the system.

To update to 2.3 version from the console, begin with the following steps:

apt-get update
apt-get dist-upgrade

The system will inform you that some packages cannot be authenticated. Do
not worry about that, just enter "y" to continue.

Answer "y" to all the questions you are asked, all the appropriate files
will be updated with the package files.

Once that you've installed the system you will likely need to upgrade
the ossim-agent. On your AlienVault Sensors or in the all-in-one profile for
single-system installations run the following command to determine your
current version level.:

dpkg -l |grep ossim-agent

If the version is < 2.3 you will need to run the following command:

apt-get install ossim-agent

This command updates the OpenVAS scanner to the latest version and also the
ossim-agent. Please check your versions.

The following is a list of some of the new functionality delivered with
version 2.3:

 * Customized views in the SIEM analyzer
 * HTML display report fixed
 * Nessus 4 and OpenVAS 2/3 support
 * Remote distributed scanning using nmap
 * Capability to stop remote scannings
 * Multiple visualization and usage improvements
 * Extensive new built in reports
 * Advanced Reporting Wizard
 * Performance optimization in Tickets, Alarms (using session cache and
new indexes)
 * Improved policy definitions
 * HTTPS enabled by default

Please contact AlienVault of your AlienVault partner for technical
assistance with this upgrade or for information on any AlienVault offering. You can also ask in <a href="http://www.alienvault.com/forum">the forum</a>