Server 2019 NPS (Network Policy Server) & DHCP

MISAdmin 381 Reputation points
2023-12-07T19:33:21.11+00:00

I have some Fortinet APs and I want only certain devices to connect to these IPs. I set up NPS on my DCs. NPS allows the connection if I have a user account with the MAC of the device as the account name and password. This part is working. My problem is the device is not getting an DHCP assigned address from my DHCP servers... also on the DCs. It gets a self-assigned 169.254.x.x address. Prior to setting up NPS, DHCP would work. I was using a policy on the scope and entering the allowed MACs there.

The only event I see in the DHCP logs is "DHCP client request from 1CBFCECF08BA was dropped since the applicable IP address ranges in scope/superscope are out of available IP addresses." This event message is not helpful as I am not out of DHCP addresses. I received this same error before NPS when devices tried to connect that were not in the scope policy.

Is there more to do in the NPS server to allow devices to get a DHCP address or is there something else I am missing?

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,569 questions
Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Wesley Li 6,190 Reputation points
    2024-01-09T07:44:16.1633333+00:00

    Hello

    Please check the policy configuration of NPS to confirm that these policies do not restrict the access rights of DHCP clients and match the configuration of the DHCP server.

    The NPS and DHCP servers need to be able to communicate properly for IP address assignment and management. Ensure that there are no devices or configurations in the network that prevent communication between the NPS and DHCP servers.

    Best Regards,

    Wesley Li

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