| KB ID: | 10002 |
| Last Revision: | November 26, 2006 |
| Version: | 1.0 |
Search: Find all users who failed to log onto a specific computer.
The primary logon failures to a computer are logged as:
- Logon Failure (ID: 529)
- Pre-authentication Failed (ID: 675)
On top of Logon Failures (ID: 529), failed logons to remote machines might be logged as a Pre-authentication Failed (ID: 675). The difference between Logon Failures and Pre-authentication Failures is that the IP logged by a Logon Failures sometimes contains the IP address of the remote computer if the user is logging in remotely via Terminal Service (aka Remote Desktop) whereas the IP logged in the Pre-authentication Failures is always the IP Address of the computer being logged onto. The name of the computer being logged onto isn't logged, but should be easily attainable with the IP Address in the log.
PREREQUISITES
The name (aka sAMAccountName) of the computer.
ESTIMATED QUERY TIME
< 1 second.
METHOD 1 (Quick Search)
1. Enter in the computer name in
the Quick Search field and click Go.
2. (If needed) Turn off "Activity logs BY object" and "Activity logs TO
object".
3. Sort by S/F (Success/Failure) and sort by logs with the type of
"F".
4. (If needed) Turn on Smart Filter and disable any events that contain
information that does not contain logs you are not looking for.
Note: A Service Ticket Request is also logged when the user authenticates via Kerberos (for example Outlook uses Kerberos to authenticate to a Microsoft Exchange Server.) In this scenario, you can use the Smart Filter to filter out Kerberos authentications that are not logons.
METHOD 2 (Advanced Search)
1. Enter the computer name in
the Target Name field.
2. Select Logon Events only.
3. Select the Type as "Failure".
3. Click Submit.
For a more thorough search, start a new search, find the IP address of the computer, and do a search of the IP address with the Type of Failure.
LIKELY SCENARIOS IT APPLIES TO
- You want to know who has been trying to log in to the computer.
- You want the usage information on a computer.
- The computer was used in a security incident and you want to find out if there were any brute force attempts to log onto that computer.
FINE TUNE YOUR SEARCH
If you know the time scope, domain of the computer, or want to restrict your searches to users in a specific domain you can fine tune your search.