community_id processor computes a network flow hash according to the
Community ID Flow Hash
The flow hash is useful for correlating all network events related to a single flow. For example you can filter on a community ID value and you might get back the Netflow records from multiple collectors and layer 7 protocol records from Packetbeat.
By default the processor is configured to read the flow parameters from the appropriate Elastic Common Schema (ECS) fields. If you are processing ECS data then no parameters are required.
processors: - community_id:
If the data does not conform to ECS then you can customize the field names
that the processor reads from. You can also change the
target field which
is where the computed hash is written to.
processors: - community_id: fields: source_ip: my_source_ip source_port: my_source_port destination_ip: my_dest_ip destination_port: my_dest_port iana_number: my_iana_number transport: my_transport icmp_type: my_icmp_type icmp_code: my_icmp_code target: network.community_id
If the necessary fields are not present in the event then the processor will silently continue without adding the target field.
The processor also accepts an optional
seed parameter that must be a 16-bit
unsigned integer. This value gets incorporated into all generated hashes.