---
title: "config security radius"
slug: "config-security-radius"
updated: 2025-05-17T05:48:35Z
published: 2025-05-17T05:48:35Z
canonical: "docs.fmad.io/config-security-radius"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fmad.io/llms.txt
> Use this file to discover all available pages before exploring further.

# config security radius

Commands for configuring [RADIUS](https://en.wikipedia.org/wiki/RADIUS) authentication. Also see [the corresponding article](/v1/docs/authentication-radius).

---

## config security radius host

Set the IP address of the authentication server that Nginx will contact when a log-in is attempted.

```fmadiocli
config security radius host <IP address>
```

Example output:

```plaintext
[Wed Dec 18 07:00:51 2024] > config security radius host 192.168.255.255
[Wed Dec 18 07:00:52 2024] Changes made successfully.
```

**Note:**

- Multiple addresses, separated by whitespace, can be given using double quotation marks, e.g. `config security radius host "192.168.255.254 192.168.255.255"`.

---

## config security radius protocol

Set the value for the `Framed-Protocol` attribute sent to the authentication server. Valid values for `&lt;protocol&gt;` include `PPP` and `SLIP`.

```fmadiocli
config security radius protocol <protocol>
```

Example output:

```plaintext
[Wed Dec 18 07:01:08 2024] > config security radius protocol PPP
[Wed Dec 18 07:01:09 2024] Changes made successfully.
```

**Note:**

- Use `config security radius protocol ""` to unset the protocol. Be aware that single quotation marks cannot be used in place of double quotation marks.

---

## config security radius secret

Set the shared secret that gets sent to the authentication server.

```fmadiocli
config security radius secret <string>
```

Example output:

```plaintext
[Wed Dec 18 07:01:22 2024] > config security radius protocol "hello world"
[Wed Dec 18 07:01:23 2024] Changes made successfully.
```

**Note:**

- Use `config security radius protocol ""` to unset the secret. Be aware that single quotation marks cannot be used in place of double quotation marks.

---

## config security radius timeout

Set the RADIUS log-in session time-out period in minutes. The given argument can be a number, but it can also be an arbitrary Lua expression that evaluates to a number. ***Please note that if an expression has whitespace in it, it must be enclosed within double quotation marks.***

```fmadiocli
config security radius timeout <expression>
```

Example output:

```plaintext
[Sat May 17 05:46:35 2025] > config security radius timeout 60
[Sat May 17 05:46:35 2025] Set RADIUS session time-out to 60 minute(s)
[Sat May 17 05:46:37 2025] > config security radius timeout 60*24
[Sat May 17 05:46:38 2025] Set RADIUS session time-out to 1440 minute(s)
[Sat May 17 05:46:47 2025] > config security radius timeout "60 * 12"
[Sat May 17 05:46:47 2025] Set RADIUS session time-out to 720 minute(s)
```