It also enables communication between work or server processes of SAP NetWeaver AS and external programs. Programs within the system are allowed to register. Part 5: Security considerations related to these ACLs. When using SNC to secure logon for RFC Clients or Registered Server Programs the so called SNC User ACL, also known as User Authentication, is introduced and must be maintained accordingly. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. At time of writing this can not be influenced by any profile parameter. The wildcard * should not be used at all. Access to the ACL files must be restricted. Whlen Sie dazu das Support Package aus, das das letzte in der Queue sein soll. The subsequent blogs of will describe each individually. Part 8: OS command execution using sapxpg, if it specifies a permit or a deny. 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 is the index value shown in the pop-up), Gateway, Security, length, line, rule, limit, abap , KBA , BC-CST-GW , Gateway/CPIC , Problem. this parameter controls the value of the default internal rules that the Gateway will use, in case the reginfo/secinfo file is not maintained. About item #1, I will forward your suggestion to Development Support. Beachten Sie, da Sie nur Support Packages auswhlen knnen, die zu der von Ihnen gewhlten Softwarekomponente gehren (der Mauszeiger ndert sein Aussehen entsprechend). However, you still receive the "Access to registered program denied" / "return code 748" error. File reginfocontrols the registration of external programs in the gateway. Part 7: Secure communication Hint: For AS ABAP the built-in ACL file editor of transaction SMGW (Goto Expert Functions External Security Maintain ACL Files) performs a syntax check. Should a cyberattack occur, this will give the perpetrators direct access to your sensitive SAP systems. In this case the Gateway Options must point to exactly this RFC Gateway host. The following syntax is valid for the secinfo file. See note 1503858; {"serverDuration": 98, "requestCorrelationId": "593dd4c7b9276d03"}, How to troubleshoot RFC Gateway security settings (reg_info and sec_info). 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. Hint: Besides the syntax check, it also provides a feature supporting rule creation by predicting rules out of an automated gateway log analysis. Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann. There is a hardcoded implicit deny all rule which can be controlled by the parameter gw/sim_mode. Refer to the SAP Notes 2379350 and2575406 for the details. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. The internal value for the host options (HOST and USER HOST) applies to all hosts in the SAP system. As i suspect it should have been registered from Reginfo file rather than OS. Furthermore the means of some syntax and security checks have been changed or even fixed over time. Alerting is not available for unauthorized users. The RFC Gateway can be used to proxy requests to other RFC Gateways. This parameter will allow you to reproduce the RFC Gateway access and see the TP and HOST that the access is using hence create the rules in the reginfo or secinfo file; 5)The rules defined in the reginfo or secinfo file can be reviewed in colored syntactic correctness. Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. To overcome this issue the RFC enabled program SAPXPG can be used as a wrapper to call any OS command. 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. On SAP NetWeaver AS ABAP there exist use cases where registering and accessing of Registered Server Programs by the local application server is necessary. Each line must be a complete rule (rules cannot be broken up over two or more lines). The RFC destination would look like: The secinfo files from the application instances are not relevant. In case of TP Name this may not be applicable in some scenarios. This makes sure application servers must have a trust relation in order to take part of the internal server communication. Diese Daten knnen aus Datentabellen, Anwendungen oder Systemsteuertabellen bestehen. You have configured the SLD at the Java-stack of the SolMan system, using the RFC Gateway of the SolMans ABAP-stack. The PI system has one Central Instance (CI) running at the server sappici, and one application instance (running at the server sappiapp1). To permit registered servers to be used by local application servers only, the file must contain the following entry. Access to this ports is typically restricted on network level. The local gateway where the program is registered always has access. What is important here is that the check is made on the basis of hosts and not at user level. Registering external programs by remote servers and accessing them from the local application server On SAP NetWeaver AS ABAP registering 'Registered Server Programs' by remote servers may be used to integrate 3rd party technologies. Durch einen Doppelklick auf eine Zeile erhalten Sie detaillierte Informationen ber die Task- Typen auf den einzelnen Rechnern. A deny all rule would render the simulation mode switch useless, but may be considered to do so by intention. To mitigate this we should look if it is generated using a fixed prefix and use this as a pattern with an ending wildcard in order to reduce the effective values, e.g., TP=Trex__*, which would still be better than TP=*`. Use host names instead of the IP address. File reginfocontrols the registration of external programs in the gateway. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. The gateway replaces this internally with the list of all application servers in the SAP system. The very first line of the reginfo/secinfo file must be "#VERSION=2"; Each line must be a complete rule (you cannot break the rule into two or more lines); The RFC Gateway will apply the rules in the same order as they appear in the file, and only the first matching rule will be used (similar to the behavior of a network firewall). 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. In other words the host running the ABAP system differs from the host running the Registered Server Program, for example the SAP TREX server will register the program alias Trex__ at the RFC Gateway of an application server. Please note: The wildcard * is per se supported at the end of a string only. 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. Part 8: OS command execution using sapxpg. Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. We can look for programs listed with Type = REGISTER_TP and field ADDR set to any IP address or hostname not belonging to any application server of the same system. For example: the system has the CI (hostname sapci) and two application instances (hostnames appsrv1 and appsrv2). Privacy | The keyword local will be substituted at evaluation time by a list of IP addresses belonging to the host of the RFC Gateway. Check the secinfo and reginfo files. Please make sure you have read at least part 1 of this series to be familiar with the basics of the RFC Gateway and the terms i use to describe things. Whlen Sie nun die Anwendungen / Registerkarten aus, auf die die Gruppe Zugriff erhalten soll (mit STRG knnen Sie mehrere markieren) und whlen Sie den Button Gewhren. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. See the examples in the note1592493; 2)It is possible to change the rules in the files and reload its configuration without restart the RFC Gateway: open the transaction SMGW -> Goto -> expert functions -> external security -> reload However, in such situation, it is mandatory to de-register the registered program involved and reregister it again because programs already registered will continue following the old rules; 3)The rules in the secinfo and reginfo file do not always use the same syntax, it depends of the VERSION defined in the file. You must keep precisely to the syntax of the files, which is described below. With secinfo file this corresponds to the name of the program on the operating system level. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. Additional ACLs are discussed at this WIKI page. The secinfo file has rules related to the start of programs by the local SAP instance. In production systems, generic rules should not be permitted. This means that the sequence of the rules is very important, especially when using general definitions. When using SNC to secure RFC destinations on AS ABAP the so called SNC System ACL, also known as System Authentication, is introduced and must be maintained accordingly. Alerting is not available for unauthorized users, Right click and copy the link to share this comment, Part 1: General questions about the RFC Gateway and RFC Gateway security, Part 8: OS command execution using sapxpg, Secure Server Communication in SAP Netweaver AS ABAP. After reloading the file, it is necessary to de-register all registrations of the affected program, and re-register it again. This ACL is applied on the ABAP layer and is maintained in transaction SNC0. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. ber das Dropdown-Men regeln Sie, ob und wie weit Benutzer der Gruppe, die Sie aktuell bearbeiten, selbst CMC-Registerkartenkonfigurationen an anderen Gruppen / Benutzern vornehmen knnen! To set up the recommended secure SAP Gateway configuration, proceed as follows:. Notice that the keyword "internal" is available at a Standalone RFC Gateway (like the RFC Gateway process that runs at an SCS or ASCS instance) only after a certain SAP kernel version. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. The wild card character * stands for any number of characters; the entry * therefore means no limitation, fo* stands for all names beginning with fo; foo stands precisely for the name foo. This also includes the loopback address 127.0.0.1 as well as its IPv6 equivalent ::1. It might be needed to add additional servers from other systems (for an SLD program SLD_UC, SLD_NUC, for example).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).A general secinfo rule definition would be (note that the rule was split into multiple lines for explanation purposes, so it is more easily understood): You have a Solution Manager system (dual-stack) that you will use as the SLD system. Sie knnen die Queue-Auswahl reduzieren. It is common and recommended by many resources to define the following rule in a custom prxyinfo ACL: With this, all requests from the local system, as well as all application servers of the same system, will be proxied by the RFC Gateway to any destination or end point. We solved it by defining the RFC on MS. Despite this, system interfaces are often left out when securing IT systems. Since this keyword is relaying on a kernel feature as well as an ABAP report it is not available in the internal RFC Gateway of SAP NW AS Java. Only the secinfo from the CI is applicable, as it is the RFC Gateway from the CI that will be used to start the program (check the Gateway Options at the screenshot above). The network service that, in turn, manages the RFC communication is provided by the RFC Gateway. Its functions are then used by the ABAP system on the same host. Das Protokoll knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen. After implementing this note, modify the Gateway security files "reg_info" and "sec_info" with TP=BIPREC* (Refer notes 614971 and 1069911). To use all capabilities it is necessary to set the profile parameter gw/reg_no_conn_info = 255. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. The RFC Gateway can be seen as a communication middleware. If someone can register a "rogue" server in the Message Server, such rogue server will be included in the keyword "internal" and this could open a security hole. The RFC Gateway is capable to start programs on the OS level. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. Same host at the end of a string only rule would render the simulation mode switch,! 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