Relevant Info (I hope!)
Leap 15.1
KDE Plasma 5.12.8
Applet - whatever is at the end of: System Settings | Network Connections | Add a new connection | Scroll down to “Other” and “Import VPN connection”
Private.key identifies you to OpenVPN server, so you are expected to know its password. You should ask whoever you got the private.key from (probably, server administrator). Good chances are, it is not password protected at all - as far as I know, OpenVPN does not have option (and hence configuration directive) to provide private key password.
A screenshot can be helpful to know what you did (and you didn’t succeed in posting a screenshot), from your description we can’t know if the private key is the secret aka password, or fi your key is encrypted with a password.
Or,
Describe how you’re entering the password or key,
Are you opening the file and pasting the file contents into a field?
Or, are you entering a path to a file containing the password or key?
And,
Where did you get the file or text?
Were you told what the text is, or did you receive a file from someone?
To post a screenshot,
You first need to upload your file to a location anywhere on the Internet where the file can be publicly viewed.
Some common places people use are
Personal storage like Google Pictures, Dropbox, Google Drive, etc.
If you start a wiki (see my message signature, this is easy to do), when you login to your Wiki page you will find a clickable link in the left navigation pane where you can upload your screenshot to an openSUSE server
pastebin like http://pastebin.com or http://paste.opensuse.org/
After you upload your screenshot,
In your Forum post you can click on the “Insert Image” button and paste the URL to your picture and save.
I can connect using the command line using the configuration file provided by the VPN host. This confirms my knowledge of a username & password:
# openvpn --config myConfigFile.ovpn
Tue Aug 20 08:06:39 2019 OpenVPN 2.4.3 x86_64-suse-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Jun 20 2017
Tue Aug 20 08:06:39 2019 library versions: OpenSSL 1.1.0i-fips 14 Aug 2018, LZO 2.10
**Enter Auth Username: myUsername
Enter Auth Password: myPassword
**
... omitted for brevity ...
Tue Aug 20 08:07:20 2019 Initialization Sequence Completed
However, when I try to import my .ovpn file into the KDE GUI, I am left with one field that I don’t understand?
(at this point I would like to show you an image - I have tried the instructions you [tsu2] have given me - again?). Let me try once more…
If I leave the “Private Key Password” field blank, when I try and use the connection (open “Network Connections” in the Task Bar pop-up) it throws this dialogue at me?
When certificates are exchanged, they are often encrypted and use a specific format like pem
But, your certificates seem to be “crt” which are likely not encrypted.
If that’s the case, then simply leave the fields blank and click “OK”
EDIT:
Actually, as I’m looking at your screenshot which looks different than I remember,
It looks like there may that this private key is something different, that identifies the User.
If no password came with the file, then simply click “OK” Otherwise you should contact the person who issued you the private key.
Or,
Try without the private key if you have a User certificate which is usually how my VPNs are set up…
You may be prompted for the private key password only because you specified a private key.
Link to screenshot was present in your original post and working just fine.
Once more explicit question - did you receive any certificates from you VPN server admin? We still do not know whether reference to certificates comes from OpenVPN profile or it is just what plasma applet defaults to, in which case simply change connection type to use plain user/password without certificates.