﻿---
title: Network direction processor
description: The Network direction processor determines network traffic direction (inbound, outbound, internal, or external) based on source and destination IP addresses...
url: https://www.elastic.co/elastic/docs-builder/docs/2988/solutions/observability/streams/management/extract/network-direction
products:
  - Elastic Cloud Enterprise
  - Elastic Cloud Hosted
  - Elastic Cloud Serverless
  - Elastic Cloud on Kubernetes
  - Elastic Observability
  - Elastic Stack
  - Elasticsearch
  - Kibana
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Planned
---

# Network direction processor
The **Network direction** processor determines network traffic direction (inbound, outbound, internal, or external) based on source and destination IP addresses.
To determine network direction:
1. Select **Create** → **Create processor**.
2. Select **Network direction** from the **Processor** menu.
3. Set the **Source IP** to the field containing the source IP address.
4. Set the **Destination IP** to the field containing the destination IP address.
5. Set the internal networks using either a list of CIDR ranges or a field containing the list.


## YAML reference

In [YAML mode](/elastic/docs-builder/docs/2988/solutions/observability/streams/management/extract#streams-editing-yaml-mode), configure the network direction processor using the following parameters. For the complete Streamlang syntax, refer to the [Streamlang reference](https://www.elastic.co/elastic/docs-builder/docs/2988/solutions/observability/streams/management/streamlang).
Specify exactly one of `internal_networks` or `internal_networks_field`.

| Parameter                 | Type     | Required                                                | Description                                                    |
|---------------------------|----------|---------------------------------------------------------|----------------------------------------------------------------|
| `source_ip`               | string   | Yes                                                     | Field containing the source IP address.                        |
| `destination_ip`          | string   | Yes                                                     | Field containing the destination IP address.                   |
| `target_field`            | string   | No                                                      | Target field for the direction result.                         |
| `internal_networks`       | string[] | One of `internal_networks` or `internal_networks_field` | List of internal network CIDR ranges.                          |
| `internal_networks_field` | string   | One of `internal_networks` or `internal_networks_field` | Field containing the list of internal networks.                |
| `ignore_missing`          | boolean  | No                                                      | When `true`, skip this processor if a source field is missing. |

```yaml
- action: network_direction
  source_ip: attributes.source.ip
  destination_ip: attributes.destination.ip
  target_field: attributes.network.direction
  internal_networks:
    - "10.0.0.0/8"
    - "172.16.0.0/12"
    - "192.168.0.0/16"
```