Freeradius server error

Hello everyone,

Our freeradius server shows the following error and cannot connect to the firewall and freeradius service is down. How to fix the error?

Hi ider,

on Debian-based systems there may be problems with RADIUS, which lead to the fact that a login e.g. to a VPN is no longer possible.

If your system is configured accordingly, so-called “unattended updates” of FreeRADIUS can currently cause problems on Debian-based systems like Ubuntu LTS.
In such a case the configuration of FreeRADIUS could be changed so that authentication against privacyIDEA is no longer possible.

This automatic update can create new links in the directory /etc/freeradius/3.0/sites-enabled/.
However, only the link “privacyidea” is allowed to exist in this directory.


  1. remove all links from the directory /etc/freeradius/3.0/sites-endabled/
  2. set the correct link again
    ln -s /etc/freeradius/3.0/sites-available/privacyidea /etc/freeradius/3.0/sites-enabled/
  3. restart the FreeRADIUS server:
    systemctl restart freeradius.service



This happened only with ubuntu 18 configured systems with Freeradius


Thank you Julio.