Authentication passing on Cisco ACS but failing on VPN Concentrator.
I am experiencing a problem where users, within a couple of NT domains, are being authenticated against the Cisco ACS server (RADIUS) then the same users are failing authentication on the VPN Concentrator.
I am currently able to authenticate other NT domain users and AD users through the same ACS/VPN Concentrator pair.
What's going on?
The users that are passing on the ACS and failing on the VPN can be authenticated locally within the domain.
When I try a test authentication against the authentication server configured on the Concentrator, I get the following message returned:
Authentication Error: No response from server
However the user is definately passed on the ACS server.
Re: Authentication passing on Cisco ACS but failing on VPN Conce
The error means "No response from server = There is no response from the selected server within the configured timeout and retry periods".
The server might be improperly configured or out of service, the network might be down or clogged, etc. Check the server configuration parameters, be sure the server is operating, check the network connections, etc
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