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Make the following TCP/IP setttings as a prerequisite for communication:

  • In order foe the SAP system to find the target machine, the TCP/IP prerequisites must be met, particularly the IP addresses are known in each hosts file.

  • The name of the gateways and dispatchers entered into the file services, for example, sapgw00 and sapdp00.

  • In SAP system IDocs are sent from the update by default. Therefore the TCP/IP link must also be created for the update machine.

  • You are working in registration mode. Therefore the connection remains open betwen the external system program and gateway.

If you do not work in registration mode, the Gateway should have the right to start the external program (RFC server) by Remote Shell.