Managing TCP/IP Settings 

As a prerequisite for communication, you make the following TCP/IP settings:

·        In order for the SAP system to find the target system, you must fulfill the TCP/IP prerequisites, in particular the IP addresses must be known in the relevant hosts file.

·        You have entered the name of the gateway and the dispatcher in the services file, for example, sapgw00 and sapdp00.

·        In the standard system, IDocs are sent from the update transaction. Ensure that the TCP/IP link was also created for the update machine.

·        You work in registration mode. This means that the connection between the non-SAP system program and the gateway remains open. For more information, see Registering Server Programs with the SAP Gateway.

If you do not work in registration mode, then the SAP gateway must have the authorization to start the external program (RFC server) using Remote Shell.

For details on the TCP/IP settings, see the documentation SAP Communication: Configuration.