CONSOLA 12C DB EXPRESS

The DB Express runs entirely with pl/sql code within the XDB schema. It’s XDB that leverages its features to enable a web-based console, and it’s embedded by default in the database.
To enable it, it’s necessary to check that the parameter dispatchers is enabled for XDB:

PgSQL

SQL> show parameter dispatchers NAME TYPE VALUE ----------- ------ ----------------------------------- dispatchers string (PROTOCOL=TCP) (SERVICE=CLASSICXDB)

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SQL> show parameter dispatchers NAME        TYPE   VALUE ----------- ------ ----------------------------------- dispatchers string (PROTOCOL=TCP) (SERVICE=CLASSICXDB)

and then set an https port unique on the server:
  

PgSQL

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SQL> exec dbms_xdb_config.sethttpsport (5502); PL/SQL procedure successfully completed. SQL>

If you’ve already done it but you don’t remember the port number you can get it with this query:
  

PgSQL

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SQL> select dbms_xdb_config.gethttpsport () from dual; DBMS_XDB_CONFIG.GETHTTPSPORT() ------------------------------ 5502

https://yourserver:5502/em