| Description |
This article describes how to solve an issue where, upon testing the OTP on a FortiAuthenticator agent, it shows a message stating that the verfication of the user OTP raised an exception.
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| Scope |
FortiAuthenticator. |
| Solution |
The FortiAuthenticator Rest API shows error messages as below:
RestAPI: A destination unavailable exception occurred while opening an SSL stream: Failed to connect to FAC X.X.X.X: System.Net.Sockets.SocketException (0x80004005): A socket operation was attempted to an unreachable host X.X.X.X:443
To fix this, disable Require strong cryptography in the GUI under Administration -> System Access -> Administrative Access:
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