---
name: "radiusd"
section: "8"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "openbsd"]
url: "https://new.carta.tech/radiusd"
---

# radiusd(8)

Remote Authentication Dial In User Service (RADIUS) daemon

## NAME

**radiusd** – Remote Authentication Dial In User Service (RADIUS) daemon

## SYNOPSIS

**radiusd** \[**-dn**\] \[**-f** *file*\]

## DESCRIPTION

The **radiusd** daemon implements the RADIUS protocol.

To have **radiusd** enabled at boot time, use “rcctl enable radiusd”, which sets

```
radiusd_flags=""
```

in rc.conf.local(8).

The options are as follows:

- **-d**

  Do not daemonize, log to stderr instead of [syslog(3)](/syslog/3.md), and produce some additional debugging output.

- **-f** *file*

  Specify an alternative configuration file.

- **-n**

  Configtest mode. Only check the configuration file for validity.

## FILES

- */etc/radiusd.conf*

  Default configuration file.

## SEE ALSO

[radiusd.conf(5)](/radiusd.conf/5.md), [radiusctl(8)](/radiusctl/8.md), [rc.conf(8)](/rc.conf/8.md)

## STANDARDS

*Remote Authentication Dial In User Service (RADIUS)*, RFC 2865, June 2000.

## HISTORY

The **radiusd** daemon first appeared in OpenBSD 5.8.

## AUTHORS

YASUOKA Masahiko ⟨*yasuoka@openbsd.org*⟩