Since Master Data Governance is based on SAP NetWeaver technology, for information about network security, see the corresponding sections of the SAP NetWeaver Security Guide at  http://help.sap.com SAP ERP Release/Language SAP NetWeaver Library Administrator's Guide NetWeaver Security Guide Network and Communication Security Network Services :

If you provide services in the Internet, you should protect your network infrastructure with a firewall at least. You can further increase the security of your system or group of systems by placing the groups in different network segments, each of which you then protect from unauthorized access by a firewall. You should bear in mind that unauthorized access is also possible internally if a malicious user has managed to gain control of one of your systems.

Ports

Master Data Governance is executed in SAP NetWeaver and uses the ports of AS ABAP or AS Java. For more information see the corresponding security guides for SAP NetWeaver in the topics for AS ABAP Ports and AS Java Ports. For information about other components, such as SAPinst, SAProuter, or SAP Web Dispatcher, see the document TCP/IP Ports Used by SAP Applications in SAP Developer Network at http://sdn.sap.com/irj/sdn/security under  Infrastructure Security Network and Communications Security .