Hi,
I've setup NPS server with NPS extension for MFA to be used in order to use 2-factor authentication for clients VPN requests.
Most of the clients connects fine but with some of them they get authentication failures several times until several reboots and at the and connecting successfully.
What I can see in security logs on the NPS server are usually two different audit failure logs in different cases:
1) Event ID: 6273; Reason code: 21; Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request.
2) Event ID: 6274; Reason code: 9; Reason: The request was discarded by a third-party extension DLL file.
What could be the reason for these events and how to prevent them? As I said, at last users can establish VPN connection but before that maybe they are presented with several authentication failures or performed several reboots to try if that can fix things.
Kind regards,
Zoran
I've setup NPS server with NPS extension for MFA to be used in order to use 2-factor authentication for clients VPN requests.
Most of the clients connects fine but with some of them they get authentication failures several times until several reboots and at the and connecting successfully.
What I can see in security logs on the NPS server are usually two different audit failure logs in different cases:
1) Event ID: 6273; Reason code: 21; Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request.
2) Event ID: 6274; Reason code: 9; Reason: The request was discarded by a third-party extension DLL file.
What could be the reason for these events and how to prevent them? As I said, at last users can establish VPN connection but before that maybe they are presented with several authentication failures or performed several reboots to try if that can fix things.
Kind regards,
Zoran
Zoran Zasovski