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    Incorrect .DLL Path For RADIUS
    • 13 Dec 2024
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    Incorrect .DLL Path For RADIUS

    • Updated on 13 Dec 2024
    • 1 Minute to read
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    Article summary

    Windows Event Viewer Error: Event ID 13

    If RADIUS authentications are failing or you're getting Event ID 13 in Event Viewer talking about an issue with finding 2fanps.dll, it's likely an issue due to the old install path for the MFA server. This is caused by an upgrade to a newer version, then running our ENABLE_2FA_RADIUS.bat file. This file adds the new .dll path to the multi-string instead of updating the old one.

    The fix is to simply edit the "ExtensionDLLs" value to contain only the new path.

    nps 1 - check value.png

    MFA Server Version

    This fix only works on 4.9.5.1 or newer, when the new install path was introduced.

    Updating The Extensions Keys

    1. Open Registry Editor as an administrator.

    2. Navigate to:
      HKLM\System\CurrentControlSet\Services\AuthSrv\Parameters\

    3. Modify ExtensionDLLs REG_MULTI_SZ to contain only the newer path:
      C:\Program Files\Identity Automation\RapidIdentity MFA\radius\2fanps.dll
      nps 2 - delete old.png


    1. Repeat Steps 2-3 for the registry path:
      HKLM\System\ControlSet001\Services\AuthSrv\Parameters\

    1. Restart your Network Policy Server service.

    Troubleshooting

    In case removing the old install path does not work, try modifying ExtensionDLLs to a single line REG_SZ and insert C:\Program Files\Identity Automation\RapidIdentity MFA\radius\2fanps.dll for the value.

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