Community ID Network Flow Hash

The community_id processor computes a network flow hash according to the Community ID Flow Hash specification.

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 the Network Packet Capture integration.

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, no parameters are required.

  - community_id:

If the data does not conform to ECS, you can customize the field names that the processor reads from. You can also change the target field that the computed hash is written to. For example:

  - 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, the processor silently continues without adding the target field.