Splunk® Common Information Model Add-on

Common Information Model Add-on Manual

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Network Resolution (DNS)

The fields and tags in the Network Resolution (DNS) data model describe DNS traffic, both server:server and client:server.

Note: A dataset is a component of a data model. In versions of the Splunk platform prior to version 6.5.0, these were referred to as data model objects.

Tags used with the DNS event dataset

The following tags act as constraints to identify your events as being relevant to this data model. For more information, see the topic How to use these reference tables in this manual.

Dataset name Tag name
DNS network
resolution
dns

Fields for the Network Resolution event dataset

The following table lists the extracted and calculated fields for the event dataset in the model. The table does not include any inherited fields. For more information, see the topic How to use these reference tables in this manual.

The key for using the column titled "Abbreviated list of example values" follows:

  • Recommended: Add-on developers make a best effort to map these event fields. If these fields are not populated, then the event is not very useful.
  • Required: Add-on developers map these event fields when using the pytest-splunk-addon to test for CIM compatibility. See pytest-splunk-addon documentation.
  • Prescribed fields: Permitted values that can populate the fields, which Splunk is using for a particular purpose. Other valid values exist, but Splunk is not relying on them.
  • Other values: Other example values that you might see.
Dataset name Field name Data type Description Abbreviated list of example values
DNS additional_answer_count number Number of entries in the "additional" section of the DNS message. required for pytest-splunk-addon
DNS answer string Resolved address for the query.
  • recommended
  • required for pytest-splunk-addon
DNS answer_count number Number of entries in the answer section of the DNS message. required for pytest-splunk-addon
DNS authority_answer_count number Number of entries in the 'authority' section of the DNS message. required for pytest-splunk-addon
DNS dest string The destination of the network resolution event. You can alias this from more specific fields, such as dest_host, dest_ip, or dest_name.
  • recommended
  • required for pytest-splunk-addon
DNS dest_bunit string The business unit of the destination.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS dest_category string The category of the network resolution target, such as email_server or SOX-compliant.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS dest_port number The destination port number.
DNS dest_priority string The priority of the destination, if applicable.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS duration number The time taken by the network resolution event, in seconds.
DNS message_type string Type of DNS message.
  • recommended
  • required for pytest-splunk-addon
  • prescribed fields:
    QUERY, RESPONSE
DNS name string The name of the DNS event.
DNS query string The domain which needs to be resolved. Applies to messages of type "Query".
  • recommended
  • required for pytest-splunk-addon
DNS query_count number Number of entries that appear in the "Questions" section of the DNS query. required for pytest-splunk-addon
DNS query_type string The field may contain DNS OpCodes or Resource Record Type codes. For details, see the Domain Name System Parameters on the Internet Assigned Numbers Authority (IANA) web site. If a value is not set, the DNS.record_type field is referenced.
  • required for pytest-splunk-addon
  • prescribed fields:
    Query, IQuery, Status, Notify, Update, A, MX, NS, PTR
DNS record_type string The DNS resource record type. For details, see the List of DNS record types on the Wikipedia web site.
  • required for pytest-splunk-addon
  • prescribed fields:
    A, DNAME, MX, NS, PTR
DNS reply_code string The return code for the response. For details, see the Domain Name System Parameters on the Internet Assigned Numbers Authority (IANA) web site.
  • recommended
  • required for pytest-splunk-addon
  • prescribed fields:
    No Error, Format Error, Server Failure, Non-Existent Domain
  • other:
    NoError, FormErr, ServFail, NXDomain, NotImp, Refused, YXDomain, YXRRSet, NotAuth, NotZone, BADVERS, BADSIG, BADKEY, BADTIME, BADMODE, BADNAME, BADALG
DNS reply_code_id number The numerical id of a return code. For details, see the Domain Name System Parameters on the Internet Assigned Numbers Authority (IANA) web site.
  • recommended
  • required for pytest-splunk-addon
  • prescribed fields:
    0, NoError, 1, FormErr,2, ServFail, 3, NXDomain,
DNS response_time number The amount of time it took to receive a response in the network resolution event, in seconds if consistent across all data sources, if applicable. required for pytest-splunk-addon
DNS src string The source of the network resolution event. You can alias this from more specific fields, such as src_host, src_ip, or src_name. required for pytest-splunk-addon
DNS src_bunit string The business unit of the source.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS src_category string The category of the source, such as email_server or SOX-compliant.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS src_port number The port number of the source.
DNS src_priority string The priority of the source.

This field is automatically provided by asset and identity correlation features of applications like Splunk Enterprise Security. Do not define extractions for this field when writing add-ons.
DNS tag string This automatically generated field is used to access tags from within datamodels. Do not define extractions for this field when writing add-ons.
DNS transaction_id number The unique numerical transaction id of the network resolution event. required for pytest-splunk-addon
DNS transport string The transport protocol used by the network resolution event. required for pytest-splunk-addon
DNS ttl number The time-to-live of the network resolution event.
DNS vendor_product string The vendor product name of the DNS server. The Splunk platform can derive this field from the fields vendor and product in the raw data, if they exist. recommended
Last modified on 27 October, 2020
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This documentation applies to the following versions of Splunk® Common Information Model Add-on: 4.16.0, 4.17.0, 4.18.0


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