Troubleshoot network device logging or syslog device logging in SEM
If a No Device Found error message appears in the widget, make sure that you configured the device to send logs to the correct IP address. See Troubleshoot alerts on the SEM Console for troubleshooting steps.
SEM console does not display syslog data
Verify that your devices are configured to forward syslog data to the SEM virtual appliance IP address. If your appliance cannot receive logs, your device may not be supported.
If your devices are configured correctly and your SEM appliance is still not receiving syslog data, identify the facilities that are collecting log data. When you complete this process, configure the appropriate connector from the facility to the log device so Security Event Manager can normalize and monitor this information in the SEM Manager.
Verify that Security Event Manager is receiving the raw data from your syslog devices.
See your hypervisor documentation for information about using the virtual console.
Open the CMC command line. See Log in to the SEM CMC command line interface for steps.
checklogsand press Enter.
The appliance displays all facilities receiving logs from syslog devices, such as firewalls, routers, and switches.
In this example, 1, 12, and 18 are active syslog facilities because they contain stored log data. Facilities 13, 15, 16, and 17 are inactive because their syslog log files are empty.
- Match a facility with a monitored device.
Choose a facility number and record the local number (such as
local2) for a future step.
Enter your chosen facility number (for example,
local2), and then press Enter.
Eto view the beginning or end of the log file, respectively, and press Enter.
Enter the number of lines to display on your screen, and then press Enter.
Pressing Enter defaults the output to 500 lines.
Press Enter again.
The raw data appears on your screen.
Review and match the data to a monitored syslog device in your network.
- Repeat steps 3 and 4 in this section to match additional facilities with log data to a monitored syslog device in your network.
Configure a connector from the facility to the device
The following table maps each syslog facility to the file name in the SEM Manager. The connectors defined in SEM Manager read these logs to normalize the log events.
The hardened operating system will prevent you to access the file system.
|Syslog Facility||Log File Path|
After you verify that data is received from a device, manually enable the log connector that supports the device. The connector maps events from the monitored Windows system event log to a SEM normalized event.
- Match the facility of your monitored device with the corresponding log file path.
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On the SEM menu bar, navigate to Manage > Appliances.
Next to the appliance name, click , and then select Connectors.
In the Refined Results pane search field, enter the brand name of the monitored device and press Enter.
If your device does not display in the list, contact Customer Sales (for an evaluation license) or Technical Support (for a production license) for assistance with unsupported devices.
Next to the device, click , and then select New.
In the Log File field, make sure the
localxportion of the path matches the facility number you configured on your device or the facility you recorded in the previous procedure.
For example, if your recorded facility is
/var/log/local2.login the field.
- Verify that the remaining fields and selections are correct, and then click Save.
The connector appears in the Connectors grid with a gray status icon.
- Next to the connector, click , and then select Start.
When the status icon turns green, the SEM connector is configured correctly.
View the data from the device
After you configure a connector to the facility, verify that the SEM appliance is receiving log data from the device.
You may need to authenticate to the device to generate data, as some devices do not generate a continuous stream of data.
(missing or bad snippet)
On the SEM menu bar, click Monitor.
In the Filters pane, expand Overview, and then click All events.
Watch for new events that appear in the grid with the device IP address in the DetectionIP column.
When new events display with your device IP address, the device is sending log data to the SEM appliance.