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Keycyte PAM 3.2 · Administrator Guide

Configuring the RADIUS Server

Keycyte PAM includes a RADIUS server. Network access devices (RADIUS clients, also called NAS), such as VPN gateways, firewalls and wireless controllers, can send their sign-in requests to it. The RADIUS server authenticates the user with the same chain as the Keycyte PAM sign-in page (local users, RADIUS, LDAP/Active Directory) and asks for the user’s MFA code when MFA is enabled.

The RADIUS server runs as a separate Keycyte PAM service. You can see its state and restart it on the Services page.

To open the page, select Settings > Radius Server. If the server has not been configured yet, the page says so; fill in the settings and save them.

Note

Do not confuse this page with the RADIUS card in Settings > Authentication. That card makes Keycyte PAM a RADIUS client of an external server; this page makes Keycyte PAM the RADIUS server for your devices.

Configuring the RADIUS Server

To configure the server:

  1. Specify the following settings:

    FieldDescription
    Listen PortUDP port the server listens on. Default: 1812.
    Shared SecretSecret shared with the RADIUS clients. Leave it empty to keep the current secret.
    MFA Timeout (seconds)How long the server waits for the user’s MFA code, 30 to 600. Default: 180.
    Max Failed AttemptsNumber of failed attempts allowed, 1 to 10. Default: 3.
    Session Timeout (seconds)10 to 3600. Default: 30.
    Allowed NAS IPsComma-separated addresses of the devices allowed to send requests, for example 10.0.0.1, 10.0.0.2. Leave it empty to allow all.
    Log LevelDEBUG, INFO (default) or ERROR.
    DescriptionFree-text note.
  2. Click Save.

  3. On each network device, add Keycyte PAM as a RADIUS server with the address of the Keycyte PAM server, the listen port and the shared secret.

Important

Restrict Allowed NAS IPs to your devices. With an empty list, any host that knows the shared secret can test passwords against Keycyte PAM.

Page updated: November 1, 2026 Send feedback
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