Ensure that it is within the validity period, properly installed, and that the server is set to the correct time and date. If you’re having system-wide issues you should first verify that the security certificate loaded on the RADIUS server is okay. Whether you’re running the server for 802.1X, VPN or other network authentication purposes, you’ll discover general troubleshooting tips that apply among all Network Access Servers (NAS) and clients.
In our latest server tutorial we’ll discuss some items and settings you can review when troubleshooting RADIUS (Remote Authentication Dial-In User Service) issues on your network.