Manual Chapter : Configuring High-Speed Remote Logging of DNS DoS events

Applies To:

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BIG-IP AFM

  • 14.1.0
Manual Chapter

Configuring High-Speed Remote Logging of DNS DoS events

Overview: Configuring remote high-speed DNS logging

You can configure the BIG-IP® system to log information about DNS traffic and send the log messages to remote high-speed log servers. You can choose to log either DNS queries or DNS responses, or both. In addition, you can configure the system to perform logging on DNS traffic differently for specific resources. For example, you can configure logging for a specific resource, and then disable and re-enable logging for the resource based on your network administration needs.

This illustration shows the association of the configuration objects for remote high-speed logging.

Association of remote high-speed logging configuration objects

Task summary

Creating a pool of remote logging servers

Before creating a pool of log servers, gather the IP addresses of the servers that you want to include in the pool. Ensure that the remote log servers are configured to listen to and receive log messages from the BIG-IP system.
Create a pool of remote log servers to which the BIG-IP system can send log messages.
  1. On the Main tab, click Local Traffic > Pools .
    The Pool List screen opens.
  2. Click Create.
    The New Pool screen opens.
  3. In the Name field, type a unique name for the pool.
  4. Using the New Members setting, add the IP address for each remote logging server that you want to include in the pool:
    1. Type an IP address in the Address field, or select a node address from the Node List.
    2. Type a service number in the Service Port field, or select a service name from the list.
      Note: Typical remote logging servers require port 514.
    3. Click Add.
  5. Click Finished.

Creating a remote high-speed log destination

Before creating a remote high-speed log destination, ensure that at least one pool of remote log servers exists on the BIG-IP system.

Create a log destination of the Remote High-Speed Log type to specify that log messages are sent to a pool of remote log servers.

  1. On the Main tab, click System > Logs > Configuration > Log Destinations .
    The Log Destinations screen opens.
  2. Click Create.
  3. In the Name field, type a unique, identifiable name for this destination.
  4. From the Type list, select Remote High-Speed Log.
    Important: If you use log servers such as Remote Syslog, Splunk, or ArcSight, which require data be sent to the servers in a specific format, you must create an additional log destination of the required type, and associate it with a log destination of the Remote High-Speed Log type. With this configuration, the BIG-IP system can send data to the servers in the required format.
    The BIG-IP system is configured to send an unformatted string of text to the log servers.
  5. From the Pool Name list, select the pool of remote log servers to which you want the BIG-IP system to send log messages.
  6. From the Protocol list, select the protocol used by the high-speed logging pool members.
  7. Click Finished.

Creating a formatted remote high-speed log destination

Ensure that at least one remote high-speed log destination exists on the BIG-IP system.

Create a formatted logging destination to specify that log messages are sent to a pool of remote log servers, such as Remote Syslog, Splunk, or IPFIX servers.

  1. On the Main tab, click System > Logs > Configuration > Log Destinations .
    The Log Destinations screen opens.
  2. Click Create.
  3. In the Name field, type a unique, identifiable name for this destination.
  4. From the Type list, select a formatted logging destination, such as Remote Syslog, Splunk, or IPFIX.
    The Splunk format is a predefined format of key value pairs.
    The BIG-IP system is configured to send a formatted string of text to the log servers.
  5. If you selected Remote Syslog, then from the Syslog Format list select a format for the logs, and then from the High-Speed Log Destination list, select the destination that points to a pool of remote Syslog servers to which you want the BIG-IP system to send log messages.
    Important: For logs coming from Access Policy Manager (APM), only the BSD Syslog format is supported.
  6. If you selected Splunk or IPFIX, then from the Forward To list, select the destination that points to a pool of high-speed log servers to which you want the BIG-IP system to send log messages.
  7. Click Finished.

Creating a publisher

Ensure that at least one destination associated with a pool of remote log servers exists on the BIG-IP system.
Create a publisher to specify where the BIG-IP system sends log messages for specific resources.
  1. On the Main tab, click System > Logs > Configuration > Log Publishers .
    The Log Publishers screen opens.
  2. Click Create.
  3. In the Name field, type a unique, identifiable name for this publisher.
  4. For the Destinations setting, select a destination from the Available list, and click << to move the destination to the Selected list.
    Note: If you are using a formatted destination, select the destination that matches your log servers, such as Remote Syslog, Splunk, or ArcSight.
  5. Click Finished.

Creating a custom DNS DoS protection logging profile

Create a custom logging profile to log DNS DoS events and send the log messages to a specific location.
  1. On the Main tab, click Security > Event Logs > Logging Profiles .
    The Logging Profiles list screen opens.
  2. Click Create.
    The Create New Logging Profile screen opens.
  3. In the Profile Name field, type a unique name for the logging profile.
  4. In the Logging Profile Properties, select the DoS Protection check box.
    The DoS Protection tab opens.
  5. In the DNS DoS Protection area, from the Publisher list, select the publisher that the BIG-IP system uses to log DNS DoS events.
    You can specify publishers for other DoS types in the same profile, for example, for SIP or Application DoS Protection.
  6. Click Create.
    The logging profile is created.
Now you created a logging profile so that the BIG-IP® system can log messages about SIP DoS events and send the log messages to a pool of IPFIX collectors.
Assign this custom DNS DoS logging profile to a protected object.

Logging DoS events for a protected object

Ensure that at least one log publisher exists on the BIG-IP system.
Assign a custom logging profile to a protected object when you want the system to log DoS events for the traffic the protected object processes.
  1. On the Main tab, click Security > DoS Protection > Protected Objects .
  2. Click the name of the protected object for which you want to log DoS events.
    The Properties pane opens on the right.
  3. In the Network & General area, for Logging Profiles, move the logging profile to assign from the Available list into the Selected list.
    This assigns the logging profile to the protected object.
  4. Click Save.
The system logs DoS events for the protected object.
You can review DoS event logs at Security > Event Logs > DoS and select the type of DoS event log to view.

Disabling DNS DoS logging

Disable DNS DoS logging when you no longer want the BIG-IP system to log information about the DNS traffic handled by the resources to which the logging profile is assigned.
  1. On the Main tab, click Security > Event Logs > Logging Profiles .
    The Logging Profiles list screen opens.
  2. Click the name of a profile.
  3. Disable DNS DoS logging:
    • If the profile handles logging for DNS DoS protection only, for DoS Protection, uncheck the Enabled check box.
    • If the profile handles logging for SIP or Network DoS as well as DNS, in DNS DoS Protection, you can change the Publisher to none.
  4. Click Update.
The system does not log DNS traffic handled by the resources to which this profile is assigned.