You cannot display DBCON with the standard tools

You are getting below message while try to open table DBCON using the transaction code SE16 or SE16N.

You cannot display DBCON with the standard tools
Message no. MO408

Diagnosis
The maintenance status of this table or this view is set in the ABAP Dictionary in such a way that display and maintenance using standard tools (SE16, SE17, SM30/SE54) is not allowed. Therefore, display using the Data Browser is not possible either.
You can change the maintenance status in the ABAP Dictionary (SE11).

Solution

To view the DBCON table content, you have to use transaction code DBCO. From here, you can display the existing database connections and as well of creating a new connection.