---
title: MAC Filtering Configuration
slug: reference-guide-3-0-0/mac-filtering-configuration
description: Learn how to activate MAC filtering with 802.1x Authentication in this document. Discover why users can only utilize predefined MAC addresses for RADIUS authentication and how to set it up. Follow step-by-step instructions with helpful images to ensure a 
docTags: 
createdAt: 2022-08-01T12:33:45.000Z
---

If MAC addresses are defined for a user, that user can only use those MAC addresses. The same MAC address can be assigned to different users. Users cannot use undefined MAC addresses for RADIUS authentication. 

To activate MAC filtering while using 802.1x Authentication:

- Check the **MAC Filtering **box in the **Administration / RADIUS 802.1x Config** screen.

::Image[]{src="https://api.archbee.com/api/optimize/g9cApVza9NIhSh0pjZYtA/YR7myTStTploaaQ4vIrI9_image.png" size="80" width="855" height="430" caption="802.1x Mac Filtering" position="center" showCaption="true"}

1. Navigate to **Administration** > **MAC Filtering**.
2. Enter the username and user MAC Address to be allowed and click** Save.**



::Image[]{src="https://api.archbee.com/api/optimize/g9cApVza9NIhSh0pjZYtA/7ts-zLKWHddPKNZRTnRjT_image.png" size="80" width="855" height="426" caption="802.1x Mac Filtering" position="center" showCaption="true"}