Network direction processoredit

Calculates the network direction given a source IP address, destination IP address, and a list of internal networks.

The network direction processor reads IP addresses from Elastic Common Schema (ECS) fields by default. If you use the ECS, only the internal_networks option must be specified.

Table 30. Network Direction Options

Name Required Default Description

source_ip

no

source.ip

Field containing the source IP address.

destination_ip

no

destination.ip

Field containing the destination IP address.

target_field

no

network.direction

Output field for the network direction.

internal_networks

yes *

List of internal networks. Supports IPv4 and IPv6 addresses and ranges in CIDR notation. Also supports the named ranges listed below. These may be constructed with template snippets. * Must specify only one of internal_networks or internal_networks_field.

internal_networks_field

no

A field on the given document to read the internal_networks configuration from.

ignore_missing

no

true

If true and any required fields are missing, the processor quietly exits without modifying the document.

description

no

-

Description of the processor. Useful for describing the purpose of the processor or its configuration.

if

no

-

Conditionally execute the processor. See Handling pipeline failures.

ignore_failure

no

false

Ignore failures for the processor. See Handling failures in pipelines.

on_failure

no

-

Handle failures for the processor. See Handling failures in pipelines.

tag

no

-

Identifier for the processor. Useful for debugging and metrics.

One of either internal_networks or internal_networks_field must be specified. If internal_networks_field is specified, it follows the behavior specified by ignore_missing.

Supported named network rangesedit

The named ranges supported for the internal_networks option are:

  • loopback - Matches loopback addresses in the range of 127.0.0.0/8 or ::1/128.
  • unicast or global_unicast - Matches global unicast addresses defined in RFC 1122, RFC 4632, and RFC 4291 with the exception of the IPv4 broadcast address (255.255.255.255). This includes private address ranges.
  • multicast - Matches multicast addresses.
  • interface_local_multicast - Matches IPv6 interface-local multicast addresses.
  • link_local_unicast - Matches link-local unicast addresses.
  • link_local_multicast - Matches link-local multicast addresses.
  • private - Matches private address ranges defined in RFC 1918 (IPv4) and RFC 4193 (IPv6).
  • public - Matches addresses that are not loopback, unspecified, IPv4 broadcast, link local unicast, link local multicast, interface local multicast, or private.
  • unspecified - Matches unspecified addresses (either the IPv4 address "0.0.0.0" or the IPv6 address "::").
Examplesedit

The following example illustrates the use of the network direction processor:

POST _ingest/pipeline/_simulate
{
  "pipeline": {
    "processors": [
      {
        "network_direction": {
          "internal_networks": ["private"]
        }
      }
    ]
  },
  "docs": [
    {
      "_source": {
        "source": {
          "ip": "128.232.110.120"
        },
        "destination": {
          "ip": "192.168.1.1"
        }
      }
    }
  ]
}

Which produces the following result:

{
  "docs": [
    {
      "doc": {
        ...
        "_source": {
          "destination": {
            "ip": "192.168.1.1"
          },
          "source": {
            "ip": "128.232.110.120"
          },
          "network": {
            "direction": "inbound"
          }
        }
      }
    }
  ]
}