Maintain transaction start permissions on call CALL TRANSACTION
Conclusion and outlook
It's never too late to rethink your authorization concept. Start by defining the objective of each role and take advantage of the reporting offered in SAP SuccessFactors.
SAP authorizations are a security-critical and thus an immensely important topic in companies. They are used not only to control the access options of users in the SAP system, but also the external and internal security of company data depends directly on the authorizations set.
Define S_RFC permissions using usage data
In addition to defining permissions for external RFC access through the S_RFC authorization object, it is possible to prevent external calls to function blocks. From SAP Net-Weaver AS ABAP 7.40 there is the additional SAP Unified Connectivity (UCON) layer. It controls external access to RFC function blocks independently of users or roles and can be configured to suit your needs. All function modules that are to be executable via RFC are entered into the UCON Communication Assembly. If a function block is not stored there, the call will be blocked. UCON has been designed to minimise impact on RFC call performance. The necessary function blocks are identified in the UCON Phase Tool (transaction UCONPHTL), which constantly monitors all external RFC calls and supports an introduction of the UCON Communication Assembly. This allows calls to new function blocks (such as custom developments, support package changes) to be analysed and, if necessary, released for external access. In addition, UCON offers the possibility to review the configuration in an evaluation phase. There are approximately 40,000 RFC-enabled function blocks in an ERP system; Usually no more than a few hundred of them are used. With the use of UCON you therefore increase the security of your system.
The first step is to create an IMG project. You can create a new project or edit an existing project to create a customising role. To do this, call the SPRO_ADMI project management entry transaction. If a suitable project is not available, you can view the list of SAP customising activities. To do this, click the SAP Reference-IMG button or create a new project. To do this, select the Create Project button ( ) or the (F5) button. A new window will open, where you enter the project name. Note that you have a maximum of ten characters for the name. Once you have confirmed your input, a new screen will open. The General Data tab allows you to specify users, project managers, project times, and the language for the information texts.
If you get into the situation that authorizations are required that were not considered in the role concept, "Shortcut for SAP systems" allows you to assign the complete authorization for the respective authorization object.
This must be set to 0; only then a jump is allowed.
You can also find some useful tips from practice on the subject of SAP authorizations on the page www.sap-corner.de.
The values that were actually deleted and added can be seen in the columns from Value to Value (see figure next page).