# Prerequisites

## Docker Prerequisites

Before you deploy DecisionRules with Docker, make sure your environment allows outbound traffic to the required DecisionRules services.

### Required network access

Your server must be able to reach these endpoints:

{% hint style="warning" %}
If your environment uses a firewall, proxy, or outbound allowlist, you must allow traffic to both services before deployment.
{% endhint %}

#### License server

DecisionRules uses the license server to validate your license.

* URL: `https://license.decisionrules.io/`
* IP addresses:
  * `75.2.68.203`
  * `99.83.137.90`

**Offline license alternative**

If your environment cannot allow traffic to the license server, you can use an offline license instead.

See [Offline License](/doc/other-deployment-options/docker-and-on-premise/offline-license.md) for setup steps.

#### Distribution server

DecisionRules uses the distribution server to deliver the required distribution content.

* URL: `https://distribution.decisionrules.io/`
* IP addresses:
  * `166.117.101.202`
  * `166.117.209.110`


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.decisionrules.io/doc/other-deployment-options/docker-and-on-premise/prerequisites.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.