Failed binding to socket

This error message is produced when the server cannot open a socket on the specified port. There are a few reasons why this can happen, but the most common one is that there is already another instance of FreeRADIUS running.

Cause: You are trying to run the server in debug mode, without stopping the server that is running in the background.

Action: Stop the server which is running in the background, and you can then run it in debug mode.

Cause: The server does not have permission to open the given socket/port.

Action: Check that the server has the correct UID/GID permissions.

Action: Check that something like SeLinux is not preventing the server from opening sockets.