Here is the challenge which i need to implement and looking for a solution approach.
I need to implement a custom VF Page Search Functionality inside Salesforce. The Data is inside Elastic Search which is a open source Search & Analytic engine. The Elastic Search is inside our Company's network. I have the API to access using JSON & I'm able to do it using a REST based tool.
Now, Since Salesforce is outside our Company's network i need to authenticate using Ping Identity & then access Elastic Search API.
I'm really not sure about how this authentication works since the first call will be from Salesforce everytime. Can someone please help. I'm unsure if this will be using SSL or OAuth etc.