The VIP plugin for Microsoft Credential Provider displays the message 'Symantec VIP Authentication: Contacting VIP for Challenge...'. Users are unable to log in even after entering the security code manually.
The VIP plugin is unable to reach the RADIUS Validation Server(s).
Confirm that the RADIUS validation service on the destination Enterprise Gateway is turned on. If the service is ON, any received traffic is captured in the log file on the LOGS tab. Example of the service turned OFF and unreachable:
Check the registry settings to ensure the IP addresses and ports for both the primary and secondary servers are valid.
Check connectivity to the RADIUS validation servers using the VSRadiusClient_test.exe tool.