---
title: Hardware Address Registration in Access Server
canonical: https://openvpn.net/as-docs/hardware-address-registration/
product: Access Server Docs
---

# Hardware Address Registration in Access Server

You can create a hardware address checking script to enhance the security of your authentication by only allowing users with registered MAC addresses and UUID strings to connect to the VPN server successfully.

- [How to Set Up Hardware Address Checking with a Post-auth Script](https://openvpn.net/as-docs/tutorials/tutorial--hardware-address-post-auth.md)

Our sample script automatically registers the device’s MAC address or UUID string, but you can configure it to have complete control over it as the administrator. The post-auth script can accept two hardware addresses per account, but only auto-registers the first; you can manually add the optional secondary address.

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Prev: [X.509 Attribute Rules](https://openvpn.net/as-docs/x-509-attribute-rules.md)
Next: [Host Checking](https://openvpn.net/as-docs/host-checking.md)
Index: https://openvpn.net/as-docs/llms.txt