Windows NPS LogsUpdated Aug 31, 2023
Note: Before starting this procedure, discuss this log forwarding option with your Concierge Security® Team.
You can configure Windows Network Policy Server® (NPS) to send the necessary logs to Arctic Wolf for monitoring security information.
- Activated Arctic Wolf Sensor
See Active Directory Sensor Installation for installation instructions.
- Configure Windows NPS log file properties.
- Configure NXLog to forward NPS logs to your Arctic Wolf appliance.
- Contact your CST.
Open the NPS console or NPS Microsoft Management Console (MMC).
In the navigation menu, click Policies > Accounting.
In the Log File Properties section, click Change Log File Properties.
In the Log File Properties dialog box, click the Settings tab.
In the Log the following information section, select the following checkboxes:
- Accounting requests
- Authentication requests
- Periodic accounting status
- Periodic authentication status
In the Logging failure action section, select the If logging fails, discard connection requests checkbox.
Click the Log File tab.
In the Directory field, enter the location where you want to store NPS log files.
If you do not enter a path, the default location is the
In the Format list, select ODBC (legacy).
In the Create a new log file section, select Daily.
Select the When disk is full delete older log files checkbox.
Using a text editor, open the
Add the following input to the
<nps_log_file_location>defines the location of the NPS logs flat file:
<Input in_NPS> Module im_file File "<nps_log_file_location>.log" SavePos TRUE ReadFromLast TRUE Exec $Message = $raw_event; Exec $Hostname = hostname() + "-NPS"; </Input>
For example, if the location of the NPS logs is
G:\NPSLogs\*.log, the input is:
<Input in_NPS> Module im_file File "G:\\NPSLogs\\\*.log" SavePos TRUE ReadFromLast TRUE Exec $Message = $raw_event; Exec $Hostname = hostname() + "-NPS"; </Input>
NXLog version 2.x only supports
G:\\NPSLogs\\\*.log, with three backslashes, whereas NXLog 3.x supports
G:\\NPSLogs\\*.log, with two backslashes. See the NXLog guidelines for Quoting and escaping strings for more information.
In the route section, edit the
Pathto include the new input event that you want to output. For example, if the input event is
in_NPS, the path is:
<Route 1> Path in_AD, in_EVENT, in_DNS, in_DHCP, in_NPS => out </Route>
Restart the NXLog service.
- Contact your Concierge Security® Team to inform them that you have configured syslog forwarding, and to validate that the logs are being ingested appropriately. Include the following information:
- Confirmation that you have completed the steps in this configuration guide.
- The IP address you used during the configuration.
- Any other questions or comments that you have.