How is it safer to use Mongo: http request or connect to Mongo directly?

Question

MongoDB

Server 1 - the main backend with a database (Monga)
Server 2 - an API for the front, a caching server that receives requests from the client and then accesses Server 1.
How is it safer and better to connect from Server 2 to Server 1? Will a regular http request and then the controller of Server 1 get into Monga, or will they connect directly to the remote Monga?

Answer 1

if only one remote ip is allowed by the firewall - better directly