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TCP 3387

ProtocolTCP
Port3387
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Synopsis

  • SAP Gateway service (sapgw87) uses TCP 3387 in SAP NetWeaver-based systems (e.g., SAP ECC, S/4HANA, BW). SAP gateways listen on 33NN, so port 3387 corresponds to an application server instance with system number 87.
  • It handles RFC/CPI-C traffic between SAP systems and external connectors (e.g., SAP RFC SDK clients, SAP PI/PO adapters) via the gwrd process.
  • Security note: SAP Gateway ports (33NN) are frequently targeted when secinfo/reginfo are misconfigured, enabling unauthorized RFC registrations or potential code execution within SAP landscapes.

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