Suricata package upgrades will back up each of your existing files to bak and migrate your HOME_NET and EXTERNAL_NET variables.
You'll then need to do the following: Bro package upgrades will attempt to migrate your Bro config.
Normally updates shall be applied in the test environment two to three days before being applied to the main organization.
If so, we recommend you take several minutes to read on and acquaint yourself with the importance and benefits of written, well-defined Policies & Procedures! Simply put, well-written policies and procedures allow employees to clearly understand their roles and responsibilities within predefined limits.
Basically, policies and procedures allow management to guide operations without constant management intervention.
However, there won't be any more Security Onion updates for version 12.04 as all development will be on version 14.04 moving forward.
Please see the bottom of this page for information on upgrading from 12.04 to 14.04.
That's access control, authentication, and accounting. Although the details involved in implementing AAA vary from situation to situation, there are consistent basic requirements for all three security principles.