Free wazuh open source siem installation with oracle virtual box

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okay, here's a comprehensive, detailed guide on installing and configuring a wazuh open source siem using oracle virtualbox. i'll break down each step with explanations, code examples, and best practices. this tutorial aims to get you up and running with a basic but functional wazuh deployment for testing and learning purposes.

**important notes before you begin:**

* **hardware requirements:** wazuh can be resource-intensive. for a minimal setup, you'll need at least 4gb of ram allocated to your virtualbox vm, 2 vcpus, and 30-50gb of disk space. more is better, especially if you plan on collecting a lot of logs.
* **operating system:** this guide assumes you'll use ubuntu server 22.04 or 20.04 for the wazuh server and agent installation. it's a common and well-supported platform. you can use other distributions, but you may need to adapt the commands accordingly.
* **security:** this guide provides a basic installation for learning purposes. in a production environment, you *must* harden your wazuh deployment following security best practices. this includes using strong passwords, enabling tls encryption, properly configuring firewalls, and regularly patching your systems.
* **elasticsearch/opensearch:** wazuh uses elasticsearch or opensearch (a fork of elasticsearch) as its backend for indexing and storing the security events. this tutorial uses opensearch for better maintainability and easier setup (as elastic licensing is more restrictive).
* **time synchronization:** ensure that both the host machine (where virtualbox is installed) and the guest vms have accurate time synchronization. this is crucial for log correlation. `ntpd` or `chrony` are common solutions.

**table of contents**

1. **prerequisites**
2. **creating virtual machines in virtualbox**
3. **installing and configuring the wazuh server (manager)**
4. **installing and configuring the wazuh indexer (opensearch)**
5. **installing and configuring the wazuh dashboard (opensea ...

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