SAP GUI using SNC

Dear all,

I need to test and implement the following: a way to connect from our customer's SAP GUI, to our SAP ERP via a secure connection, and vice versa (from my SAP GUI to my customer's SAP ERP).

I would like for someone to point in the right direction, or even to provide an example, as SAP documentation is not that specific on that matter (or I have not found the right document).

What do I need?

SAP GUI properties

SAProuter configuration

An explanation of how this works

Regards,