? To use the ICF to communicate with other systems, you must activate separately each individual service that you want use.
Since each active service could potentially perform security-relevant functions in other systems, it is important that you only activate those services that you really need.
If you use HTTP RFC destinations (RFC connection type H) for ICF communications with another SAP system, you can set up a Trusted System network, as with RFC communications.
In a scenario that consists of trusted systems, servers in one system trust servers from another system. Users in the first system (system A) who access the second system (system B), are not authenticated by passwords each time they access system B. System B trusts system A; this trust relationship allows system B to accept the user from system A without any further authentication. The user must have user accounts in both systems and gets the authorizations from the target system, in this case system B.
SAP Trusted System Network
The benefit of this procedure is that users only need to authenticate themselves once when they communicate with trusting systems. No logon information needs to be sent across the network.
However, to guarantee the security of trusting systems, you must check the following prerequisites, which entail an increased amount of administration:
Only if you meet these requirements do we recommend the implementation of a trusted system concept.