---
title: Network Access Server (NAS)
sidebar_custom_props:
    termName: Network Access Server (NAS)
    tags:
        - Protocols
    shortDescription: Device that sends RADIUS requests to the server.
    longDescription: Examples include VPN concentrators, Wi‑Fi controllers, firewalls, or switches. The NAS acts as the RADIUS client initiating Access‑Request and Accounting messages.
---