To improve security of CloverDX Server, you should:
Change the default password for clover user. Without changing the password, everybody would be able to log in as clover. See Change Users Password.
Create a user different from clover and add it to the admin group. If there are more administrators, create a user account for each. See Users.
Set the master password. Without the master password, you cannot use secure parameters. See Chapter 20, Secure Parameters.
Run CloverDX Server with privileges of an ordinary user, e.g. create a system account
used only for running CloverDX Server.
Do not run CloverDX Server under the root account.
Communication with system database may be unencrypted. Consider encrypting the connection to system database too.
If database provides you with a root/admin account, do not use this account for CloverDX Server. Create a separate database user account, e.g. clover.
Run CloverDX Server on HTTPS. If you communicate over HTTP, your data is sent unencrypted and eavesdroppers can easily see it.
Disable the HTTP API if you do not need it. See Chapter 36, Simple HTTP API.
In Data Services, put keystores outside a sandbox and run the service on HTTPS. If you have a keystore in a sandbox, a user with write permissions could replace it with another key store. HTTPS Connectors.
Enable user lockout after repeated failed login attempts. If you use this feature in Cluster, make sure that all cluster nodes have the same lockout configuration. See User Lockout