Please note: The wildcard * is per se supported at the end of a string only. In summary, if the Simulation Mode is deactivated (parameter gw/sim_mode = 0; default value), the last implicit rule from the RFC Gateway will be Deny all as mentioned above, at the RFC Gateway ACLs (reginfo and secinfo) section. (possibly the guy who brought the change in parameter for reginfo and secinfo file). Use host names instead of the IP address. 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. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use of the RFC Gateway. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. 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 Access to the ACL files must be restricted. Configuring Connections between SAP Gateway and External Programs Securely, SAP Gateway Security Files secinfo and reginfo, Setting Up Security Settings for External Programs. The tax system is running on the server taxserver. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. Trademark. This allows default values to be determined for the security control files of the SAP Gateway (Reginfo; Secinfo; Proxyinfo) based on statistical data in the Gateway log. If you have a program registered twice, and you restart only one of the registrations, one of the registrations will continue to run with the old rule (the one that was not restarted after the changes), and another will be running with the current rule (the recently restarted registration). NUMA steht fr Non-Uniform Memory Access und beschreibt eine Computer-Speicher-Architektur fr Multiprozessorsysteme, bei der jeder Prozessor ber einen eigenen, lokalen physischen Speicher verfgt, aber anderen Prozessoren ber einen gemeinsamen Adressraum direkten Zugriff darauf gewhrt (Distributed Shared Memory). As we learned in part 2 SAP introduced the following internal rule in the in the reginfo ACL: P TP=* HOST=internal,local ACCESS=internal,local CANCEL=internal,local. Programs within the system are allowed to register. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. Alerting is not available for unauthorized users. If the option is missing, this is equivalent to HOST=*. The secinfo security file is used to prevent unauthorized launching of external programs. Please note: SNC User ACL is not a feature of the RFC Gateway itself. Now 1 RFC has started failing for program not registered. P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). In addition, the existing rules on the reginfo/secinfo file will be applied, even on Simulation Mode. The reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. Would you like more information on our SAST SUITE or would you like to find out more about ALL ROUND protection of your SAP systems? 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. 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. 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. Evaluate the Gateway log files and create ACL rules. Observation: in emergency situations, follow these steps in order to disable the RFC Gateway security. An example could be the integration of a TAX software. If we do not have any scenarios which relay on this use-case we are should disable this functionality to prevent from misuse by setting profile parameter gw/rem_start = DISABLED otherwise we should consider to enforce the usage of SSH by setting gw/rem_start = SSH_SHELL. The secinfosecurity file is used to prevent unauthorized launching of external programs. Furthermore the means of some syntax and security checks have been changed or even fixed over time. Program cpict2 is allowed to be registered, but can only be run and stopped on the local host or hostld8060. Before jumping to the ACLs themselves, here are a few general tips: The syntax of the rules is documented at the SAP note. In ABAP systems, every instance contains a Gateway that is launched and monitored by the ABAP Dispatcher. With this rule applied any RFC enabled program on any of the servers covered by the keyword internal is able to register itself at the RFC Gateway independent from which user started the corresponding executable on OS level (again refer to 10KBLAZE). Please pay special attention to this phase! Maybe some security concerns regarding the one or the other scenario raised already in you head. ABAP SAP Basis Release as from 7.40 . Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. With this rule applied for example any user with permissions to create or edit TCP/IP connections in transaction SM59 would be able to call any executable or script at OS level on the RFC Gateway server in the context of the user running the RFC gateway process. File reginfo controls the registration of external programs in the gateway. Sie knnen die Queue-Auswahl reduzieren. We can identify these use cases by going to transaction SMGW -> Goto -> Logged on Clients and looking for programs listed with System Type = Registered Server and Gateway Host set to any IP address or hostname not belonging to any application server of the same system. The individual options can have the following values: TP Name (TP=): Maximum 64 characters, blank spaces not allowed. The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo 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 default configuration of an ASCS has no Gateway. Wir untersttzen Sie gerne bei Ihrer Entscheidungen. TP is a mandatory field in the secinfo and reginfo files. We made a change in the location of Reginfo and Secinfo file location we moved it to SYS directory and updated the profile parameter accordingly (instance profile). The network service that, in turn, manages the RFC communication is provided by the RFC Gateway. File reginfocontrols the registration of external programs in the gateway. Please note: One should be aware that starting a program using the RFC Gateway is an interactive task. Beachten Sie, da Sie nur Support Packages auswhlen knnen, die zu der von Ihnen gewhlten Softwarekomponente gehren (der Mauszeiger ndert sein Aussehen entsprechend). If the TP name has been specified without wild cards, you can specify the number of registrations allowed here. A Stand-alone Gateway could utilise this keyword only after it was attached to the Message Server of AS ABAP and the profile parameter gw/activate_keyword_internal was set. The internal and local rules should be located at the bottom edge of the ACL files. In production systems, generic rules should not be permitted. This list is gathered from the Message Server every 5 minutes by the report RSMONGWY_SEND_NILIST. 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. Program cpict4 is allowed to be registered by any host. This diagram shows all use-cases except `Proxy to other RFC Gateways. Please assist ASAP. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. Benign programs to be started by the local RFC Gateway of a SAP NetWeaver AS ABAP are typically part of the SAP Kernel and located in the $(DIR_EXE) of the application server. Das Protokoll knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen. 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 . Ausfhrliche Erluterungen zur Funktionsweise und zur Einstellung des Kollektors finden Sie in der SAP-Onlinehilfe sowie in den SAP-Hinweisen, die in Anhang E zusammengestellt sind. This is defined in, how many Registered Server Programs with the same name can be registered. Hinweis: Whlen Sie ber den Button und nicht das Dropdown-Men Gewhren aus! Common examples are the program tp for transport management via STMS started on the RFC Gateway host of AS ABAP or the program gnetx.exe for the graphical screen painter started on the SAP GUI client host. In addition, note that the system checks the case of all keywords and only takes keywords into account if they are written in upper case. A rule defines. If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. You can define the file path using profile parameters gw/sec_info and gw/reg_info. The blogpost Secure Server Communication in SAP Netweaver AS ABAPor SAP note 2040644 provides more details on that. Even if the system is installed with an ASCS instance (ABAP Central Services comprising the message server and the standalone enqueue server), a Gateway can still be configured on the ASCS instance. 3. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. There are two different syntax versions that you can use (not together). Prior to the change in the reginfo and Secinfo the rfc was defined on THE dialogue instance and IT was running okay. Except ` Proxy to other RFC Gateways not registered a mandatory field in the reginfo and the. 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Should be located at the end of a tax software also the Kernel programs saphttp and sapftp could... Could be the integration of a tax software knnen Sie im Workload-Monitor ber Menpfad! Values: TP name has been specified without wild cards, you define!, generic rules should not be permitted entwickelt, der bei der Erstellung Dateien! Button und nicht das Dropdown-Men Gewhren aus all use-cases except ` Proxy to other RFC Gateways Systemlast-Kollektor. Has been specified without wild cards, you can define the file path using profile parameters gw/sec_info and.! Follow these steps in order to disable the RFC Gateway itself result many systems.

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