ICF Scenarios 
The Internet Communication Framework (ICF) is an integrated component of the SAP NetWeaver Application Server. The ICF realizes the processing of HTTP, HTTPS, or SMTP requests in the ABAP work processes of an SAP system. SAP NetWeaver AS can run both server functions and client functions for ICF communications.
This section describes the measures you need to take to set up secure connections through the ICF.
Note
The following security advice applies regardless of the ICF scenario you use (SAP-SAP communication or communication between SAP and an external system).
Note
For detailed documentation about the setup and functions of the ICF, see the following:
Internet Communication Framework