Netflow codec plugin v3.5.0

• Plugin version: v3.5.0
• Released on: 2017-06-23
• Changelog

For other versions, see the overview list.

To learn more about Logstash, see the Logstash Reference.

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.

The "netflow" codec is used for decoding Netflow v5/v9/v10 (IPFIX) flows.

The following Netflow/IPFIX exporters are known to work with the most recent version of the netflow codec:

Example Logstash configuration:

input {
  udp {
    host => localhost
    port => 2055
    codec => netflow {
      versions => [5, 9]
    }
    type => netflow
  }
  udp {
    host => localhost
    port => 4739
    codec => netflow {
      versions => [10]
      target => ipfix
   }
   type => ipfix
  }
  tcp {
    host => localhost
    port => 4739
    codec => netflow {
      versions => [10]
      target => ipfix
    }
    type => ipfix
  }
}

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

Where to save the template cache This helps speed up processing when restarting logstash (So you don’t have to await the arrival of templates) cache will save as path/netflow_templates.cache and/or path/ipfix_templates.cache

• Value type is number
• Default value is 4000

Netflow v9/v10 template cache TTL (minutes)

• Value type is boolean
• Default value is false

Only makes sense for ipfix, v9 already includes this Setting to true will include the flowset_id in events Allows you to work with sequences, for instance with the aggregate filter

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

Override YAML file containing IPFIX field definitions

Very similar to the Netflow version except there is a top level Private Enterprise Number (PEN) key added:

pen:
id:
- :uintN or :ip4_addr or :ip6_addr or :mac_addr or :string
- :name
id:
- :skip

There is an implicit PEN 0 for the standard fields.

See https://github.com/logstash-plugins/logstash-codec-netflow/blob/master/lib/logstash/codecs/netflow/ipfix.yaml for the base set.

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

Override YAML file containing Netflow field definitions

Each Netflow field is defined like so:

id:
- default length in bytes
- :name
id:
- :uintN or :ip4_addr or :ip6_addr or :mac_addr or :string
- :name
id:
- :skip

See https://github.com/logstash-plugins/logstash-codec-netflow/blob/master/lib/logstash/codecs/netflow/netflow.yaml for the base set.

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

Specify into what field you want the Netflow data.

• Value type is array
• Default value is [5, 9, 10]

Specify which Netflow versions you will accept.