So-called Access Control Lists (ACL) offer a good possibility to secure your gateway in order to exclude unwanted external accesses to the database of the application server. With the help of the ACL files reginfo and secinfo an access control can be implemented, in which allowed as well as forbidden communication partners can be defined. The reginfo file controls the registration of external programs on the gateway, which means that rules can be defined that allow or prohibit programs. With the help of the file secinfo you can define which users are allowed to start an external program. To be able to use these files, you must set the parameters gw/reg_info and gw/sec_info (transaction RZ11). For more information, refer to SAP Note 1408081.
Presentation layer: The presentation layer is the top layer of the R/3 SAP Basis system and includes communication with the user. Here, the data is graphically prepared for the user on the terminal device by means of software components from the application programs of the application layer. The presentation layer represents the interface to the user (SAP GUI).
Integration of SAP notes (error correction instructions)
The application layer is the core of an R/3 SAP Basis system. This layer communicates in both directions, to the presentation layer and to the database layer. The application programs on the application servers request the required data from the database layer, process it, prepare it for the user and pass it on to the presentation layer. Data that the user enters in the SAP GUI is passed on to the database via the application servers.
The SAP Patch Manager offers two scenarios for inserting support packages or queues: Test Scenario Use the test scenario to determine whether conflicts or problems occur (e.g., unreleased repairs) or whether a modification match is necessary before the actual insertion. This scenario allows you to estimate and minimise the time and effort required to load support packages. In this scenario, no data is imported into the system, and you can continue to play in the event of an error without the error being corrected. You must select the test scenario explicitly. Note that once the test scenario has passed, the queue is empty and needs to be redefined. You must also explicitly choose the default scenario.
"Shortcut for SAP Systems" is a PC application that simplifies or even facilitates many activities in the SAP base.
Result After updating the status, the corresponding entries in the cofile and in the log file are deleted.
This is especially critical if only spaces or alternate spaces are used for the user name when creating a new user.