![]() Usually this file is located in /etc/filebeat/modules.d/ You need to configure the Zeek module file zeek.yml. If you haven’t already, you can follow our documentation here: Installationįirst, enable the Filebeat module for Zeek: filebeat modules enable zeek Configuration In order to ship Zeek logs to Coralogix, we need to first install Filebeat. ![]() Kubernetes with Fluent Bit (Without Helm)Īzure Activity and Audit Logs with FileBeat This entry was posted in DHCP, Microsoft, Networking, Windows 2012 R2, Windows Server. The log file for the following day reached 54MB with no issue. Update : I can confirm this resolved the issue for us. I will update this article if this does not resolve the issue for us. We’ve since made the following change: Set-DhcpServerAuditLog -MaxMBFileSize 4096 I checked the directory size of “%windir%\system32\dhcp” on both servers and they were very close to 250MB. Not a maximum size per individual audit log. This leads me to believe the PowerShell documentation is incorrect and “-MaxMBFileSize” specifies the maximum size of all audit logs added together. The article also specifically references the registry key the PowerShell command changes. I’ve bolded and italicized the relevant line. A minimum size requirement (in megabytes) for server disk space that is used during disk checking to determine if sufficient space exists for the server to continue audit logging.An interval for disk checking that is used to determine how many times the DHCP server writes audit log events to the log file before checking for available disk space on the server.A maximum size restriction (in megabytes) for the total amount of disk space available for all audit log files created and stored by the DHCP service.DHCP audit logs are located by default at %windir%\System32\Dhcp. The file path in which the DHCP server stores audit log files.I have no idea how I found it but after some digging I found this article for Server 2008 (we’re using 2012R2): (v=ws.10)ĭynamic Host Configuration Protocol (DHCP) servers include several logging features and server parameters that provide enhanced auditing capabilities. It turns out this PowerShell command simply changes the registry value for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DHCPServer\Parameters\DhcpLogFilesMaxSize which you can just do manually if you’d prefer. Per the above link it states “-MaxMBFileSize Specifies the maximum size of the audit log, in megabytes (MB).” We used this PowerShell to make the change a long while ago and restarted the DHCP service: Set-DhcpServerAuditLog -MaxMBFileSize 250 The thing that had us scratching our heads is we’ve had this problem before and we had re-configured DHCP on these servers to allow the log files to grow to 250MB but things had stopped at 36MB. Stopping DHCP on DHCP1, renaming the audit log and then starting DHCP on DHCP1 again appeared to resolve the issue. The log on DHCP2 was not full (yet, only 34MB in size). We dug into the DHCP servers and found the DHCP audit log on DHCP1 was full (36MB in size). By the time a technician got to the PC to check it the issue was resolved magically. We started getting reports of random devices on the network not being able to connect or login to the domain. We have DHCP audit logging enabled.ĭHCP1 handles 0-127 and DHCP2 handles 128-254 (we mostly use /24’s right now). Depending on how high up the scope your IP is will determine which DHCP server you get your IP from. The HA is configured to split the scopes in half. We run two DHCP servers in a HA configuration.
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