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During the cert generation, you will be asked for the keystore password.
Input the password you with wish to use (the keystore will be generated with such password) - you will need it in the next step.

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Restart the Unimus service, and it should be available only over HTTPS.

Notes and tips

Important note: please be careful if the keystore password contains the # character.

# is used as a comment, so a password containing it will not be fully read from the configuration.
You can enclose the password in " (double quotes) if you wish to use # as a part of the password.