Etw-1.5 update - rd

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I Accept. Radial direction mounting. Most of the time, ETW is not considered as a log source, either because it is not widely known, or because special tools are needed to keep track of log traces see Solving Windows Log Collection Challenges with Event Tracing. In addition, these tools can negatively affect DNS server performance, especially if they are set to continuously collect and write event traces to disk or convert to a format like JSON before being forwarded to a remote host.

If enabled, an audit event is logged for each instance when changes are made to the DNS server such as:. Other server operations — restarting the server, clearing of debug logs, clearing of statistics, scavenging operations. These audit events represent important operations for any DNS server. They can provide very useful information for security and compliance reasons, as well as for incident response.

MSC console by making the necessary changes for the auditing properties of that object. They need to be enabled on the DNS server before logging can happen. However, systems prior to R2, or R2 without hotfix do not have native DNS auditing capabilities included. Due to the amount of logs being generated from DNS debug logging, it is recommended to rotate logs and have them collected on a central server. Also, parsing the logs is suggested, in order to select which logs to enrich.

Although DNS debug logging has some advantages, it does come with some additional caveats worth considering:. Due to the way Microsoft handles log rollover of DNS debug logs, if the log file is located on any drive other than the C: drive, the Windows DNS service may not recreate the debug log file after a rollover. The log information gleaned from DNS debug logging is inherently unstructured. Parsing is required to create usable event logs.

If the Details option has been selected, regular expressions are needed to parse the event fields. Such configurations are complex and can be associated with additional performance overhead. For busy DNS servers, this would not be a recommended option. Depending on which of these logging methods you use, there are a few variables that can affect performance:. The place where log enrichment or parsing is done. It can be done either locally or on a central logging server after the logs are received.

The type of logging taking place. It is recommended to enable DNS debug logging only temporarily as needed. NXLog simplifies DNS log collection by providing a single software solution that incorporates the various technologies required to efficiently collect DNS related logs. You can also add additional filtering to the query.

See Windows Event Log. You have also learned about possible DNS performance considerations and the solutions available for DNS log collection. With this knowledge of the various solutions available, you can avoid the pitfalls of deploying less efficient solutions, or ending up with a deployment that is either logging too many or not enough DNS events. DNS, for many reasons, is an important asset that must not be overlooked. It is known that attackers are abusing DNS, and it is through efficient and reliable DNS log collection that you can reap the benefits of this essential component of security monitoring.