Okta RADIUS Agent troubleshooting
The RADIUS agent is not receiving traffic or authentication is failing
The RADIUS agent must be able to listen on the UDP ports that are being used by the RADIUS applications you have configured. Firewalls can impede that communication if the necessary ports are not open. If you are unable to authenticate over the RADIUS application, verify that all firewalls, including any os (Operating System) firewalls, are not filtering this traffic.
Note: The standard RADIUS port is UDP 1812, however other ports can be used.