Vaultwarden QNAP Login Problems via Smartphone

Hello,

I use the Vaultwarden App on my qnap.

I downloaded the bitwarden app on my smartphone, set the IP and wanted to connect via my login values.

Now I get this Error:

“We couldn’t verify the server’s certificate. The certificate chain or proxy settings on your device or Bitwarden server may not be set up correctly.”

Can someone help me here?

Generally you have to give more information about your setup if you want help. Given the error message you probably are not using the full certificate chain. E.g. if you use Let’s encrypt you want to use fullchain.pem and not chain.pem. So I suggest that you read and follow the advice from the wiki page:

Thank you for the fast reply, I have only the qnap cert which ends .crt
Vaultwarden should only be available internal, if I want to use it from outside I use vpn.

Regarding your link, I don’t know how to configure the app, because you install it and than it works.

Even locally over the LAN Vaultwarden will require https thus a matching valid certificate. The app on the phone needs to use the domain name of your qnap (not the LAN IP) that matches the certificate you have. My DNS server on my LAN is configured to return the local IP address of my Vaultwarden server when resolving my certificate’s domain name and that works.