SSL Bad Certificate Format error blocking management interface

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eeeehaw wrote:

How do I resolve this issue in ReadyNAS?

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First, the security issue is that the certificate is self-signed - so there is no trusted third party that can authenticate the server.  The security risk is that a man-in-the-middle attack could be undetected.  It's a big deal if you were (for example) connecting to your bank to access your account.  But it's not a significant threat for a NAS on your home network.  Also, even though the duo can't be authenticated, the connection is still encrypted.  

There is no simple way to get and install a validated certificate on the Duo.  

The simplest solution is to just click through the security warning - which is certainly possible with Chrome, Edge, and IE.  You could alternatively use FireFox and store a security exception for the NAS.

BTW, you will also find that Chrome won't populate the SMART status when you click on the SMART+ controls on the health page.  They will be populated in other browsers.