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Network direction processor

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Network direction processor

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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 31. 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 Conditionally run a processor.
`ignore_failure`	no	`false`	Ignore failures for the processor. See Handling pipeline failures.
`on_failure`	no	-	Handle failures for the processor. See Handling pipeline failures.
`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 ranges

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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 "::").

Examples

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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": {
        ...
        "_type": "_doc",
        "_source": {
          "destination": {
            "ip": "192.168.1.1"
          },
          "source": {
            "ip": "128.232.110.120"
          },
          "network": {
            "direction": "inbound"
          }
        }
      }
    }
  ]
}

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