Your setup seems quite complex, involving multiple services and components including DHCP, RADIUS, and wireless networking. Let's try to approach it step by step:
- DHCP Server: Since nmap shows your DHCP service is running, this implies that your DHCP server is probably working correctly. However, you could verify this by checking the DHCP server logs to see if it's receiving requests and serving out IP addresses. The DHCP logs are typically located at /var/log/syslog in most Linux distributions.
- RADIUS Server: Make sure the RADIUS server is running properly and configured correctly. You can do this by checking its logs, which are typically located at /var/log/freeradius/radius.log or similar, depending on your Linux distribution. You should see logs related to authentication requests from your wireless client.
- TP-Link Wireless Access Point (AP): Ensure the AP is correctly set up to use WPA2-Enterprise or WPA3-Enterprise (whichever you're using) with your RADIUS server as the authentication server. You'll need to enter the IP address of the RADIUS server and the shared secret. This configuration will be found in the Wireless Security settings of your AP.
- Wireless Client: The client needs to be configured to use WPA2-Enterprise or WPA3-Enterprise as well, and it should have the certificate installed. You'll typically need to specify the EAP method (like PEAP or EAP-TTLS), the phase 2 authentication (like MSCHAPv2), and then the identity (username) and password. For the certificate, you might need to specify the CA certificate to trust.
- Certificates: Make sure the certificates are properly installed on both the RADIUS server and the client, and that they trust the CA that issued the certificates. If there's an issue with the certificates or the trust chain, the authentication will fail.
Remember that the "Attempting to authenticate" message usually indicates that the client is having trouble with the RADIUS server authentication, which could be due to any of the above points.
It's also worth mentioning that this setup, while typical in a corporate environment, is quite complex for a beginner. If you're new to this field, it might be helpful to break down the problem and learn each component (DHCP, RADIUS, 802.1X, etc.) individually before combining them all. This might make it easier to troubleshoot and understand what's going wrong.
hey man that actually showed something there. My pc doesn't have an ip address assigned to it yet because we want for it to use DHCP so I just put in "tcpdump -i any and port 1812" and what I saw was that my tp-link wap would do access request to the radius server and the server just replied with access challenge. It did that the whole time.
The "Access-Challenge" response from the RADIUS server is part of the authentication process. This message is used in challenge/response authentication methods, like EAP-TTLS and PEAP, where the RADIUS server needs more information from the client before it can authenticate it.
In the context of EAP (Extensible Authentication Protocol), the server sends an "Access-Challenge" packet back to the client to request additional identity information. The client then sends an "Access-Request" packet with this additional information, and this back-and-forth continues until the server is either satisfied (and sends an "Access-Accept" message) or decides the client cannot be authenticated (and sends an "Access-Reject" message).
If you're seeing a repeated cycle of "Access-Request" and "Access-Challenge" without ever getting to an "Access-Accept" or "Access-Reject", then it's likely there's a problem with the authentication process.
Here are a few possible reasons for this:
- Incorrect credentials: The client may be sending incorrect credentials (username/password). Double-check that these are correct.
- Certificate problems: The client or server may not trust the other's certificate, or the certificate may be expired or otherwise invalid. Double-check the certificates, their trust chains, and their validity periods.
- EAP configuration: The client and server may be using different EAP methods, or the server may not support the EAP method the client is using. Check the EAP configurations on both sides.
- RADIUS server configuration: The server may be misconfigured, such as having the wrong shared secret for the client, or not having the client in its list of allowed clients.
Check your RADIUS server logs for more detailed error messages. These logs can usually provide more information about what's going wrong in the authentication process.