Security

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

Hi, the clients have Win11 22H1 with Bitdefender installed. And there are latest drivers on all working and not working endpoints. SSID is configured with WPA2. Error is consistent, specific machine can never authenticate on LAN nor WLAN.

Laptops Dell diagnostic didnt find any errors.

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

Are the working and non-working clients connected to the same network?  Have the exact same supplicant configuration?  What EAP method is being used?

Hi, the clients have Win11 22H1 with Bitdefender installed. And there are latest drivers on all working and not working endpoints. SSID is configured with WPA2. Error is consistent, specific machine can never authenticate on LAN nor WLAN.

Laptops Dell diagnostic didnt find any errors.

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

Yes, it is same network and same switch. EAP method is PEAP. Supplicant is configured from GPO, so it is same on all machines.

Are the working and non-working clients connected to the same network?  Have the exact same supplicant configuration?  What EAP method is being used?

Hi, the clients have Win11 22H1 with Bitdefender installed. And there are latest drivers on all working and not working endpoints. SSID is configured with WPA2. Error is consistent, specific machine can never authenticate on LAN nor WLAN.

Laptops Dell diagnostic didnt find any errors.

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

Yes, it is same network and same switch. EAP method is PEAP. Supplicant is configured from GPO, so it is same on all machines.

Are the working and non-working clients connected to the same network?  Have the exact same supplicant configuration?  What EAP method is being used?

Hi, the clients have Win11 22H1 with Bitdefender installed. And there are latest drivers on all working and not working endpoints. SSID is configured with WPA2. Error is consistent, specific machine can never authenticate on LAN nor WLAN.

Laptops Dell diagnostic didnt find any errors.

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav

PEAP is deprecated. Is Windows Credential Guard enabled on those clients? It has incompatibilities with PEAP authentication.

With CPM 6.11 & newer, by default there can be some incompatibilities with older TPM chips in clients. I know that affects EAP-TLS. Not sure about PEAP credential storage.

Yes, it is same network and same switch. EAP method is PEAP. Supplicant is configured from GPO, so it is same on all machines.

Are the working and non-working clients connected to the same network?  Have the exact same supplicant configuration?  What EAP method is being used?

Hi, the clients have Win11 22H1 with Bitdefender installed. And there are latest drivers on all working and not working endpoints. SSID is configured with WPA2. Error is consistent, specific machine can never authenticate on LAN nor WLAN.

Laptops Dell diagnostic didnt find any errors.

Vaclav

Hi

• Can you describe a bit more about the clients:
• Do you have the latest drivers for the WLAN NIC installed?
• Is it the same version of drivers on machines that work and machines not working?
• Is your SSID configured with WPA2 or WPA3?
• Is the error consistent, so a specific machine can never authenticate and another have no problem in the same location?

Dear experts,

We have CPPM as a RADIUS server in our network and we have a problem with Dell Latitude laptops 802.1x authentication. Some models are working well but Latitude 7430 and some 5520 are not able to authenticate. Everytime when I try to authenticate these models on LAN or WLAN there is only timeout in Access Tracker:

When we try the packet capture we found out that the client stop communicating with server after some time, so thats why there is the timeout:

The biggest mystery is that the some of the Latitude 5520 are working and some not. These laptops are identical.

Did someone face this kinf of problem?

Thanks

Vaclav