Protecting requests to bitcoin core?

Question

bitcoin

Interested in the issue of protecting requests to bitcoincore api.
What I mean. Laravel backend to access bitcoin api, specify server host in env and access by IP , it turns out when data is drained from server one, we also get IP server two (on which bitcoincore).

proxy=127.0.0.1:9050
rpcbind=127.0.0.1
rpcuser=user
rpcpassword=password

The bitcoincore config is above, that is, it allows the request from the server IP that we specify.
Is it possible to access not by IP, but by the domain, which, for example, we will also forward through the cloud?
Where can I read more about API? Perhaps someone came across