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Elastic Docs ›Logstash Reference [6.7] ›Codec plugins

Cef codec plugin

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Cef codec plugin

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  • Plugin version: v5.0.6
  • Released on: 2018-09-21
  • Changelog

For other versions, see the Versioned plugin docs.

Getting Help

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For questions about the plugin, open a topic in the Discuss forums. For bugs or feature requests, open an issue in Github. For the list of Elastic supported plugins, please consult the Elastic Support Matrix.

Description

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Implementation of a Logstash codec for the ArcSight Common Event Format (CEF) Based on Revision 20 of Implementing ArcSight CEF, dated from June 05, 2013 https://community.saas.hpe.com/dcvta86296/attachments/dcvta86296/connector-documentation/1116/1/CommonEventFormatv23.pdf

If this codec receives a payload from an input that is not a valid CEF message, then it will produce an event with the payload as the message field and a _cefparsefailure tag.

Cef Codec Configuration Options

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Setting Input type Required

delimiter

string

No

fields

array

No

name

string

No

product

string

No

severity

string

No

signature

string

No

vendor

string

No

version

string

No

 

delimiter

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  • Value type is string
  • There is no default value for this setting.

If your input puts a delimiter between each CEF event, you’ll want to set this to be that delimiter.

For example, with the TCP input, you probably want to put this:

input {
  tcp {
    codec => cef { delimiter => "\r\n" }
    # ...
  }
}

This setting allows the following character sequences to have special meaning:

  • \r (backslash "r") - means carriage return (ASCII 0x0D)
  • \n (backslash "n") - means newline (ASCII 0x0A)

deprecated_v1_fields (OBSOLETE)

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  • OBSOLETE WARNING: This configuration item is obsolete and will prevent the pipeline from starting if used
  • Value type is boolean
  • There is no default value for this setting.

reverse_mapping

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  • Value type is <boolean
  • Default value is false

Set to true to adhere to the specifications and encode using the CEF key name (short name) for the CEF field names.

fields

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  • Value type is array
  • Default value is []

Fields to be included in CEV extension part as key/value pairs

name

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  • Value type is string
  • Default value is "Logstash"

Name field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

product

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  • Value type is string
  • Default value is "Logstash"

Device product field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

sev (OBSOLETE)

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  • OBSOLETE WARNING: This configuration item is obsolete and will prevent the pipeline from starting.
  • Value type is string
  • There is no default value for this setting.

Obsolete severity field for CEF header use :severity instead.

severity

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  • Value type is string
  • Default value is "6"

Severity field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

Defined as field of type string to allow sprintf. The value will be validated to be an integer in the range from 0 to 10 (including). All invalid values will be mapped to the default of 6.

signature

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  • Value type is string
  • Default value is "Logstash"

Signature ID field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

vendor

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  • Value type is string
  • Default value is "Elasticsearch"

Device vendor field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

version

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  • Value type is string
  • Default value is "1.0"

Device version field in CEF header. The new value can include %{foo} strings to help you build a new value from other parts of the event.

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