Production Infrastructure Guidelines - Elastic search

I am going through the following documentation

https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html

What are the best practises for production infracture in terms of making it exposed for search requests, index requests - should it expose ip address of (only) coordinating node ?

As i understood, it is not good idea to expose any other node details other nodes apart from coordinating node. As other nodes are implicitly coordinating nodes, they might have extra burden if these nodes are exposed.