Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. Limiting access to this port would be one mitigation. All subsequent rules are not even checked. Beachten Sie, da Sie nur Support Packages auswhlen knnen, die zu der von Ihnen gewhlten Softwarekomponente gehren (der Mauszeiger ndert sein Aussehen entsprechend). They are: The diagram below shows the workflow of how the RFC Gateway works with the security rules and the involved parameters, like the Simulation Mode. With this rule applied you should properly secure access to the OS (e.g., verify if all existing OS users are indeed necessary, SSH with public key instead of user+pw). About item #1, I will forward your suggestion to Development Support. The subsequent blogs of will describe each individually. This way, each instance will use the locally available tax system. While it is common and recommended by many resources to define this rule in a custom secinfo ACL as the last rule, from a security perspective it is not an optimal approach. Configuring Connections between SAP Gateway and External Programs Securely, SAP Gateway Security Files secinfo and reginfo, Setting Up Security Settings for External Programs. In other words the same host running the ABAP system is also running the SAP IGS, for example the integrated IGS (as part of SAP NW AS ABAP) may be started on the application servers host during the start procedure of the ABAP system. You dont need to define a deny all rule at the end, as this is already implicit (if there is no matching Permit rule, and the RFC Gateway already checked all the rules, the result will be Deny except when the Simulation Mode is active, see below). For AS ABAP the ACLs should be maintained using the built-in ACL file editor of transaction SMGW (Goto Expert Functions External Security Maintain ACL Files). Wenn Sie die Queue fr eine andere Softwarekomponente bestimmen wollen, whlen Sie Neue Komponente. SMGW-->Goto -->External Functions --> External Security --> Maintenance of ACL files --> pop-up is shown as below: "Gateway content and file content for reginfo do not match starting with index <xx>" (xx is the index value shown in the . Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. Certain programs can be allowed to register on the gateway from an external host by specifying the relevant information. The syntax used in the reginfo, secinfo and prxyinfo changed over time. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. Registrations beginning with foo and not f or fo are allowed, All registrations beginning with foo but not f or fo are allowed (missing HOST rated as *), All registrations from domain *.sap.com are allowed. In the following i will do the question and answer game to develop a basic understanding of the RFC Gateway, the RFC Gateway security and its related terms. Wechseln Sie dazu auf die gewnschte Registerkarte (im Beispiel ist das Universen), whlen Sie Verwalten --> Sicherheit auf oberster Ebene --> Alle Universen (je nach Registerkarte unterscheidet sich der letzte Punkt). *. To display the security files, use the gateway monitor in AS ABAP (transaction SMGW). This publication got considerable public attention as 10KBLAZE. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. RFC had issue in getting registered on DI. Datenbankschicht: In der Datenbank, welche auf einem Datenbankserver liegt, werden alle Daten eines Unternehmens gesichert. Program hugo is allowed to be started on every local host and by every user. RFCs between two SAP NetWeaver AS ABAP systems are typically controlled on network level only. Very good post. As we learned in part 4 SAP introduced the following internal rule in the in the prxyinfo ACL: Haben Support Packages in der Queue Verbindungen zu Support Packages einer anderen Komponente (weitere Vorgngerbeziehung, erforderliches CRT) wird die Queue um weitere Support Packages erweitert, bis alle Vorgngerbeziehungen erfllt sind. In case the files are maintained, the value of this parameter is irrelevant; and with parmgw/reg_no_conn_info, all other sec-checks can be disabled =>SAP note1444282, obviously this parm default is set to 1 ( if not set in profile file ) in kernel-773, I wasted a whole day unsuccessfully trying to configure the (GW-Sec) in a new system, sorry for my bad mood. Every line corresponds one rule. CANCEL is usually a list with all SAP servers from this system (or the keyword "internal"), and also the same servers as in HOSTS (as you must allow the program to de-register itself). The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo Accessing reginfo file from SMGW a pop is displayed thatreginfo at file system and SAP level is different. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. You can make dynamic changes by changing, adding, or deleting entries in the reginfo file. Dieses Verfahren ist zwar sehr restriktiv, was fr die Sicherheit spricht, hat jedoch den sehr groen Nachteil, dass in der Erstellungsphase immer Verbindungen blockiert werden, die eigentlich erwnscht sind. As we learnt before the reginfo and secinfo are defining rules for very different use-cases, so they are not related. Its location is defined by parameter gw/reg_info. Another example would be IGS. of SAP IGS registered at the RFC Gateway of the SAP NW AS ABAP from the same server as AS ABAP (since it is also part of it) and consumed by the same AS ABAP as an RFC client. There may also be an ACL in place which controls access on application level. If these profile parameters are not set the default rules would be the following allow all rules: reginfo: P TP=* In diesem Blog-Beitrag werden zwei von SAP empfohlene Vorgehensweisen zur Erstellung der secinfo und reginfo Dateien aufgefhrt mit denen die Security Ihres SAP Gateways verstrkt wird und wie der Generator dabei hilft. Evaluate the Gateway log files and create ACL rules. The RFC library provides functions for closing registered programs. Again when a remote server of a Registered Server Program is going to be shutdown due to maintenance it may de-register its program from the RFC Gateway to avoid errors. Such third party system is to be started on demand by the SAP system.Only the (SAP level) user IDs BOB and JOHN can start this program, and they will be logged on to one of the instances from this SAP system.You have an RFC destination named TAX_SYSTEM. Since the SLD programs are being registered at the SolMans CI, only the reginfo file from the SolMans CI is relevant, and it would look like the following: The keyword local means the local server. As i suspect it should have been registered from Reginfo file rather than OS. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. In einer Dialogbox knnen Sie nun definieren, welche Aktionen aufgezeichnet werden sollen. Please note: SNC User ACL is not a feature of the RFC Gateway itself. D prevents this program from being registered on the gateway. Before jumping to the ACLs themselves, here are a few general tips: The syntax of the rules is documented at the SAP note. This means that if the file is changed and the new entries immediately activated, the servers already logged on will still have the old attributes. There are two different syntax versions that you can use (not together). To assign the new settings to the registered programs too (if they have been changed at all), the servers must first be deregistered and then registered again. Another example: you have a non-SAP tax system that will register a program at the CI of an SAP ECC system. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. The secinfo security file is used to prevent unauthorized launching of external programs. Only the first matching rule is used (similarly to how a network firewall behaves). The keyword internal means all servers that are part of this SAP system (in this case, the SolMan system). This means that the sequence of the rules is very important, especially when using general definitions. Beachten Sie, da der SAP Patch Manager die Konfiguration Ihres SAP-Systems bercksichtigt und nur solche Support Packages in die Queue aufnimmt, die in Ihr System eingespielt werden drfen. Es gibt folgende Grnde, die zum Abbruch dieses Schrittes fhren knnen: CANNOT_SKIP_ATTRIBUTE_RECORD: Die Attribute knnen in der OCS-Datei nicht gelesen werden. Its functions are then used by the ABAP system on the same host. While it was recommended by some resources to define a deny all rule at the end of reginfo, secinfo ACL this is not necessary. Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. In the slides of the talk SAP Gateway to Heaven for example a scenario is outlined in which a SAProuter installed on the same server as the RFC Gateway could be utilized to proxy a connection to local. The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). Another mitigation would be to switch the internal server communication to TLS using a so-called systemPKI by setting the profile parameter system/secure_communication = ON. So lets shine a light on security. Furthermore the means of some syntax and security checks have been changed or even fixed over time. Access to this ports is typically restricted on network level. Part 5: Security considerations related to these ACLs. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. About this page This is a preview of a SAP Knowledge Base Article. Ergebnis Sie haben eine Queue definiert. Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. To edit the security files,you have to use an editor at operating system level. In the gateway monitor (SMGW) choose Goto Logged On Clients , use the cursor to select the registered program, and choose Goto Logged On Clients Delete Client . Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. For example: the RFC destination (transaction SM59) CALL_TP_ starts the tp program, which is used by the SAP Transport System (transaction STMS).Before jumping to the ACLs themselves, here are a few general tips: A general reginfo rule definition would be (note that the rule was split into multiple lines for explanation purposes, so it is more easily understood): Usually, ACCESS is a list with at least all SAP servers from this SAP system. The secinfo file from the CI would look like the below: In case you dont want to use the keywords local and internal, youll have to manually specify the hostnames. Wir untersttzen Sie gerne bei Ihrer Entscheidungen. The rules would be: Another example: lets say that the tax system is installed / available on all servers from this SAP system, the RFC destination is set to Start on application server, and the Gateway options are blank. You have already reloaded the reginfo file. Thank you! To control the cancellation of registered programs, a cancel list can be defined for each entry (same as for the ACCESS list). In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. The wildcard * should be strongly avoided. The keyword internal will be substituted at evaluation time by a list of hostnames of application servers in status ACTIVE which is periodically sent to all connected RFC Gateways. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system.The secinfo file has rules related to the start of programs by the local SAP instance. Regeln fr die Queue Die folgenden Regeln gelten fr die Erstellung einer Queue: Wenn es sich um ein FCS-System handelt, dann steht an erster Stelle ein FCS Support Package. At time of writing this can not be influenced by any profile parameter. Please note: The wildcard * is per se supported at the end of a string only. The related program alias also known as TP Name is used to register a program at the RFC Gateway. If other SAP systems also need to communicate with it, using the ECC system, the rule need to be adjusted, adding the hostnames from the other systems to the ACCESS option. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. Hello Venkateshwar, thank you for your comment. Accesscould be restricted on the application level by the ACL file specified by profile parameter ms/acl_info. The message server port which accepts registrations is defined by profile parameter rdisp/msserv_internal. For example: you have changed to the rule related to the SLD_UC program, allowing a new server to communicate with it (you added the new server to the ACCESS option). This is a list of host names that must comply with the rules above. After an attack vector was published in the talk SAP Gateway to Heaven from Mathieu Geli and Dmitry Chastuhin at OPDCA 2019 Dubai (https://github.com/gelim/sap_ms) the RFC Gateway security is even more important than ever. Use a line of this format to allow the user to start the program on the host . P TP=cpict2 ACCESS=ld8060,localhost CANCEL=ld8060,localhost. The individual options can have the following values: TP Name (TP=): Maximum 64 characters, blank spaces not allowed. If no access list is specified, the program can be used from any client. 2.20) is taken into account only if every comma-separated entry can be resolved into an IP address. 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