netflow input to read NetFlow and IPFIX exported flows
and options records over UDP.
This input supports NetFlow versions 1, 5, 6, 7, 8 and 9, as well as IPFIX. For NetFlow versions older than 9, fields are mapped automatically to NetFlow v9.
filebeat.inputs: - type: netflow max_message_size: 10KiB host: "0.0.0.0:2055" protocols: [ v5, v9, ipfix ] expiration_timeout: 30m queue_size: 8192 custom_definitions: - path/to/fields.yml detect_sequence_reset: true
netflow input supports the following configuration options plus the
Common options described later.
The maximum size of the message received over UDP. The default is
The host and UDP port to listen on for event streams.
The size of the read buffer on the UDP socket.
The read and write timeout for socket operations.
List of enabled protocols.
Valid values are
The time before an idle session or unused template is expired. Only applicable to v9 and IPFIX protocols. A value of zero disables expiration.
This option allows v9 and ipfix templates to be shared within a session without reference to the origin of the template.
Note that setting this to true is not recommended as it can result in the wrong template being applied under certain conditions, but it may be required for some systems.
The maximum number of packets that can be queued for processing. Use this setting to avoid packet-loss when dealing with occasional bursts of traffic.
A list of paths to field definitions YAML files. These allow to update the NetFlow/IPFIX fields with vendor extensions and to override existing fields.
The expected format is the same as used by Logstash’s NetFlow codec ipfix_definitions and netflow_definitions. Filebeat will detect which of the two formats is used.
NetFlow format example:
id: - default length in bytes - :name id: - :uintN or :intN: or :ip4_addr or :ip6_addr or :mac_addr or :string - :name id: - :skip
id is the numeric field ID.
The IPFIX format similar, but grouped by Private Enterprise Number (PEN):
pen1: id: - :uintN or :ip4_addr or :ip6_addr or :mac_addr or :string - :name id: - :skip pen2: id: - :octetarray - :name
Note that fields are shared between NetFlow V9 and IPFIX. Changes to IPFIX PEN zero are equivalent to changes to NetFlow fields.
Overriding the names and/or types of standard fields can prevent mapping of ECS fields to function properly.
Flag controlling whether Filebeat should monitor sequence numbers in the
Netflow packets to detect an Exporting Process reset. When this condition is
detected, record templates for the given exporter will be dropped. This will
cause flow loss until the exporter provides new templates. If set to
Filebeat will ignore sequence numbers, which can cause some invalid flows
if the exporter process is reset. This option is only applicable to Netflow V9
and IPFIX. Default is
A list of CIDR ranges describing the IP addresses that you consider internal.
This is used in determining the values of
flow.locality. The values can be either a CIDR
value or one of the named ranges supported by the
network condition. The default value is
which classifies RFC 1918 (IPv4) and RFC 4193 (IPv6) addresses as internal.
The following configuration options are supported by all inputs.
enabled option to enable and disable inputs. By default, enabled is
set to true.
A list of tags that Filebeat includes in the
tags field of each published
event. Tags make it easy to select specific events in Kibana or apply
conditional filtering in Logstash. These tags will be appended to the list of
tags specified in the general configuration.
filebeat.inputs: - type: netflow . . . tags: ["json"]
Optional fields that you can specify to add additional information to the
output. For example, you might add fields that you can use for filtering log
data. Fields can be scalar values, arrays, dictionaries, or any nested
combination of these. By default, the fields that you specify here will be
grouped under a
fields sub-dictionary in the output document. To store the
custom fields as top-level fields, set the
fields_under_root option to true.
If a duplicate field is declared in the general configuration, then its value
will be overwritten by the value declared here.
filebeat.inputs: - type: netflow . . . fields: app_id: query_engine_12
If this option is set to true, the custom
fields are stored as top-level fields in
the output document instead of being grouped under a
fields sub-dictionary. If
the custom field names conflict with other field names added by Filebeat,
then the custom fields overwrite the other fields.
A list of processors to apply to the input data.
See Processors for information about specifying processors in your config.
The ingest pipeline ID to set for the events generated by this input.
The pipeline ID can also be configured in the Elasticsearch output, but this option usually results in simpler configuration files. If the pipeline is configured both in the input and output, the option from the input is used.
If this option is set to true, fields with
null values will be published in
the output document. By default,
keep_null is set to
If present, this formatted string overrides the index for events from this input
(for elasticsearch outputs), or sets the
raw_index field of the event’s
metadata (for other outputs). This string can only refer to the agent name and
version and the event timestamp; for access to dynamic fields, use
output.elasticsearch.index or a processor.
By default, all events contain
host.name. This option can be set to
disable the addition of this field to all events. The default value is
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