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SYS-C0245 · Windows Server Roles

NPS as a RADIUS Server

Plan one NPS policy for one group. Do not grant access from every address.

Updated 25 October 2026 · How-To

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

The planner drafts a network policy for a Windows group you type, with PEAP, and it says to grant access only to that group. It says not to grant access from every address. It does not change NPS.

One group on a server you administer. Do not put a shared secret in the note. Do not change NPS during the reading.

192.0.2.10/24 and example.com are documentation. They stay in the note.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the host named in the ticket. Read the draft, then the host, then decide.

Rollback is the file, the package version, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.

  1. Name the group.
  2. Keep the grant to that group.
  3. Leave the shared secret out.
  4. Do not change NPS.
  5. Stop.

Mistakes that outlive the command

NPS as a RADIUS Server goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for NPS as a RADIUS Server: One group. The grant is only that group. No secret is in the note. And nothing was changed.

Checks before you call it done

Confirm this before you call the change done: The group is written. PEAP is written. No secret is present. Nothing was changed. And the server is yours. If one of those fails, stop.

# One group. PEAP.
# Do not grant access from every address.
# Do not change NPS during the reading.

Before you leave the host

NPS as a RADIUS Server ends when the hostname in the prompt matches the hostname in the ticket. If it does not, you are on the wrong host. Stop. A command that succeeded on the wrong host is not progress.

The draft stays a draft until a person has read the names in it. A generator does not log into the host and does not know which disk is empty. You delete a line that names a host, a path, or an account you did not write down.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you leave on a host because a draft included them.

prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save in the ticket or in git. The real secret stays in the password store.

One change is the window. If two things move and the result is wrong, you will not know which one did it. The next change waits for its own page.

If the same step fails twice, stop for the day. The failure is the result. Adding a forum command beside a half-applied change produces a host nobody can rebuild. Restore the copy you took first.

A second person reads the hostname and the change aloud. If they cannot find them in the ticket, the note is not done. Silence is not agreement. Then leave the host alone.

This page is a planning guide. It is not a vendor manual, not an official standard, and not permission to touch a host you do not administer. You do not disable a firewall, AppArmor, or SELinux to make a check pass.

Tools for this guide

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More in this cluster

The pillar for this page, and the next published pages filed with it.

Companion: Network: RADIUS vs TACACS+.