Limit DB-Access (Which Server is allowed to access DB?)

Hi experts,

we faced the following issue ( I also opened another thread which is already solved).

We did clone a host on Linux/ASE.

By starting the db on the clone we figured out, that the DB was access on the original host.

(problem was solved by changing interfaces file).

But my question is now, is there no security-configuration which avoids, that each server can access the DB of each server?

Thats a big security-leak, as so each sever is able to access the DB.

Kind regards