Monitor unlimited number of servers
Filter log events
Create email and web-based reports

Direct access to Microsoft articles
Customized keywords for major search engines
Access to premium content

Event ID: 551 Source: Security

Source
Description
User initiated logoff:
User Name: <user name>
Domain: <domain>
Logon ID: <ID>.
Comments
 
As per Microsoft: "The user listed in the message logged off the system. Therefore, the user's primary access token, which contains the user's security information and allows access to objects, is erased from memory. After this token is erased, the user cannot access resources such as files or registry keys. When the logoff process is completed, a Security 538 message appears in Event Viewer. If a Security 538 message does not appear shortly after the Security 551 message, a program or service might not be managing its access tokens correctly. Although the user cannot access objects, the program or service might have cached an access token and therefore retained the ability to access objects". See MSW2KDB and ME828857 for details on this event.

Windows Event Log Analysis Splunk App

Build a great reporting interface using Splunk, one of the leaders in the Security Information and Event Management (SIEM) field, linking the collected Windows events to www.eventid.net.

Read more...

 

Cisco ASA Log Analyzer Splunk App

Obtain enhanced visibility into Cisco ASA firewall logs using the free Firegen for Cisco ASA Splunk App. Take advantage of dashboards built to optimize the threat analysis process.

Read more...