Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. Only clients from domain *.sap.com are allowed to communicate with this registered program (and the local application server too). The SAP note1689663has the information about this topic. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. 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. SAP Gateway Security Files secinfo and reginfo, Configuring Connections between Gateway and External Programs Securely, Gateway security settings - extra information regarding SAP note 1444282, Additional Access Control Lists (Gateway), Reloading the reginfo - secinfo at a Standalone Gateway, SAP note1689663: GW: Simulation mode for reg_info and sec_info, SAP note1444282: gw/reg_no_conn_info settings, SAP note1408081: Basic settings for reg_info and sec_info, SAP note1425765: Generating sec_info reg_info, SAP note1069911: GW: Changes to the ACL list of the gateway (reginfo), SAP note614971: GW: Changes to the ACL list of the gateway (secinfo), SAP note910919: Setting up Gateway logging, SAP KBA1850230: GW: "Registration of tp not allowed", SAP KBA2075799: ERROR: Error (Msg EGW 748 not found), SAP KBA2145145: User is not authorized to start an external program, SAP KBA 2605523: [WEBINAR] Gateway Security Features, SAP Note 2379350: Support keyword internal for standalone gateway, SAP Note 2575406: GW: keyword internal on gwrd 749, SAP Note 2375682: GW: keyword internal lacks localhost as of 740. ooohhh my god, (It could not have been more complicated -obviously the sequence of lines is important): "# This must always be the last rule on the file see SAP note 1408081" + next line content, is not included as comment within the default-delivered reginfo file or secinfo file (after installation) -, this would save a lot ofwasted life time, gw/acl_mode: ( looks like to enable/disable the complete gw-security config, but ). Default values can be determined from the aggregated Gateway logging and used to assemble control data, and subsequently leverage the control data content for further use. As i suspect it should have been registered from Reginfo file rather than OS. Part 1: General questions about the RFC Gateway and RFC Gateway security. Alerting is not available for unauthorized users, Right click and copy the link to share this comment. 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. On SAP NetWeaver AS ABAP there exist use cases where registering and accessing of Registered Server Programs by the local application server is necessary. About item #1, I will forward your suggestion to Development Support. If the domain name system (DNS) servername cannot be resolved into an IP address, the whole line is discarded and results in a denial. 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. If the Gateway protections fall short, hacking it becomes childs play. How to guard your SAP Gateway against unauthorized calls, Study shows SAP systems especially prone to insider attacks, Visit our Pathlock Germany website https://pathlock.com/de/, Visit our Pathlock Blog: https://pathlock.com/de/blog/, SAST SOLUTIONS: Now member of Pathlock Group. For example: the system has the CI (hostname sapci) and two application instances (hostnames appsrv1 and appsrv2). File reginfocontrols the registration of external programs in the gateway. If the Simulation Mode is active (parameter gw/sim_mode = 1), the last implicit rule will be changed to Allow all. Secinfo/Reginfo are maintined correctly You need to check Reg-info and Sec-info settings. An example could be the integration of a TAX software. Alerting is not available for unauthorized users. 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. 3. In SAP NetWeaver Application Server Java: The SCS instance has a built-in RFC Gateway. On SAP NetWeaver AS ABAP registering Registered Server Programs byremote servers may be used to integrate 3rd party technologies. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. If no access list is specified, the program can be used from any client. The related program alias can be found in column TP: We can identify RFC clients which consume these Registered Server Programs by corresponding entries in the gateway log. D prevents this program from being started. The keyword internal means all servers that are part of this SAP system (in this case, the SolMan system). Now 1 RFC has started failing for program not registered. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. 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. USER=mueller, HOST=hw1414, TP=test: The user mueller can execute the test program on the host hw1414. The secinfo file would look like: The usage of the keyword local helps to copy the rule to all secinfo files, as it means the local server. In this case the Gateway Options must point to exactly this RFC Gateway host. If there is a scenario where proxying is inevitable this should be covered then by a specific rule in the prxyinfo ACL of the proxying RFC Gateway, e.g.,: P SOURCE= DEST=internal,local. Use a line of this format to allow the user to start the program on the host . Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. gw/acl_mode: this parameter controls the value of the default internal rules that the RFC Gateway will use, in case the reginfo/secinfo file is not maintained. That part is talking about securing the connection to the Message Server, which will prevent tampering with they keyword "internal", which can be used on the RFC Gateway security ACL files. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. You can make dynamic changes by changing, adding, or deleting entries in the reginfo file. The reginfo file is holding rules controlling which remote servers (based on their hostname/ip-address) are allowed to either register, access or cancel which Registered Server Programs (based on their program alias (also known as TP name)). So lets shine a light on security. Remember the AS ABAP or AS Java is just another RFC client to the RFC Gateway. Die Datei kann vermutlich nicht zum Lesen geffnet werden, da sie zwischenzeitlich gelscht wurde, oder die Berechtigungen auf Betriebssystemebene unzureichend sind. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. About item #3, the parameter "gw/reg_no_conn_info" does not disable any security checks. Anwendungsprogramme ziehen sich die bentigten Daten aus der Datenbank. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. I think you have a typo. 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 . Datenbankschicht: In der Datenbank, welche auf einem Datenbankserver liegt, werden alle Daten eines Unternehmens gesichert. Part 3: secinfo ACL in detail. This publication got considerable public attention as 10KBLAZE. Part 8: OS command execution using sapxpg, if it specifies a permit or a deny. TP is restricted to 64 non-Unicode characters for both secinfo and reginfo files. Part 4: prxyinfo ACL in detail The reginfo ACL contains rules related to Registered external RFC Servers. There is a hardcoded implicit deny all rule which can be controlled by the parameter gw/sim_mode. Ergebnis Sie haben eine Queue definiert. Program foo is only allowed to be used by hosts from domain *.sap.com. In these cases the program started by the RFC Gateway may also be the program which tries to register to the same RFC Gateway. Hint: Besides the syntax check, it also provides a feature supporting rule creation by predicting rules out of an automated gateway log analysis. If the TP name itself contains spaces, you have to use commas instead. If no cancel list is specified, any client can cancel the program. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. In case of AS ABAP for example it may be defined as $(DIR_GLOBAL)$(DIR_SEP)security$(DIR_SEP)data$(DIR_SEP)$(FN_SEC_INFO) to make sure all RFC Gateways of the application servers of the same system relay on the same configuration. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. As separators you can use commas or spaces. File reginfo controls the registration of external programs in the gateway. This also includes the loopback address 127.0.0.1 as well as its IPv6 equivalent ::1. In a pure Java system, one Gateway is sufficient for the whole system because the instances do not use RFC to communicate. 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. It registers itself with the program alias IGS. at the RFC Gateway of the same application server. 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. This list is gathered from the Message Server every 5 minutes by the report RSMONGWY_SEND_NILIST. 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. there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. To use all capabilities it is necessary to set the profile parameter gw/reg_no_conn_info = 255. Of course the local application server is allowed access. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. Once you have completed the change, you can reload the files without having to restart the gateway. This could be defined in. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . Sobald dieses Recht vergeben wurde, taucht die Registerkarte auch auf der CMC-Startseite wieder auf. P SOURCE=* DEST=*. The following syntax is valid for the secinfo file. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. File reginfocontrols the registration of external programs in the gateway. 1. other servers had communication problem with that DI. 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. All programs started by hosts within the SAP system can be started on all hosts in the system. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. Its location is defined by parameter gw/sec_info. You can also control access to the registered programs and cancel registered programs. The Solution Manager (SolMan) system has only one instance, running at the host sapsmci. Program hugo is allowed to be started on every local host and by every user. 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. Durch einen Doppelklick auf eine Zeile erhalten Sie detaillierte Informationen ber die Task- Typen auf den einzelnen Rechnern. Please assist ASAP. The RFC Gateway can be used to proxy requests to other RFC Gateways. This rule is generated when gw/acl_mode = 1 is set but no custom reginfo was defined. Check the availability and use SM59 to ping all TP IDs.In the case of an SCS/ASCS instance, it cannot be reloaded via SMGW. Access to the ACL files must be restricted. 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): 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. Part 5: ACLs and the RFC Gateway security. Read more. Somit knnen keine externe Programme genutzt werden. The RFC Gateway hands over the request from the RFC client to the dispatcher which assigns it to a work process (AS ABAP) or to a server process (AS Java). Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. 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). We first registered it on the server it is defined (which was getting de-registered after a while so we registered it again through background command nohup *** & ), This solved the RFC communication on that Dialogue instance yet other Dialogue instances were not able to communicate on the RFC. This is defined in, how many Registered Server Programs with the same name can be registered. Help with the understanding of the RFC Gateway ACLs (Access Control Lists) and the Simulation Mode, in order to help prepare production systems to have these security features enabled without disruptions. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Maintenance of ACL Files .. In production systems, generic rules should not be permitted. Part 5: ACLs and the RFC Gateway security 2. 3. Sie knnen anschlieend die Registerkarten auf der CMC-Startseite sehen. Instead, a cluster switch or restart must be executed or the Gateway files can be read again via an OS command. BC-CST-GW , Gateway/CPIC , BC-NET , Network Infrastructure , Problem . where ist the hint or wiki to configure a well runing gw-security ? 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. 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. 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. secinfo: P TP=* USER=* USER-HOST=* HOST=*. With this blogpost series i try to give a comprehensive explanation of the RFC Gateway Security: Part 1: General questions about the RFC Gateway and RFC Gateway security. Check the above mentioned SAP documentation about the particular of each version; 4)It is possible to enable the RFC Gateway logging in order to reproduce the issue. If you want to use this syntax, the whole file must be structured accordingly and the first line must contain the entry #VERSION=2 (written precisely in this format). Program cpict4 is allowed to be registered by any host. 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. Part 3: secinfo ACL in detail From a technical perspective the RFC Gateway is a SAP kernel process (gwrd, gwrd.exe) running on OS level as user adm. The RFC Gateway is capable to start programs on the OS level. The reginfo file has the following syntax. This is because the rules used are from the Gateway process of the local instance. Part 8: OS command execution using sapxpg. It is common to define this rule also in a custom reginfo file as the last rule. The wildcard * should not be used at all. Access attempts coming from a different domain will be rejected. Part 2: reginfo ACL in detail. 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. The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). Configuring Connections between SAP Gateway and External Programs Securely, SAP Gateway Security Files secinfo and reginfo, Setting Up Security Settings for External Programs. The wildcard * should be strongly avoided. 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. This way, each instance will use the locally available tax system. 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. The reginfo file is holding rules controlling which remote servers (based on their hostname/ip-address) are allowed to either register, access or cancel which 'Registered Server Programs' (based on their program alias (also known as 'TP name')). If the option is missing, this is equivalent to HOST=*. However, this parameter enhances the security features, by enhancing how the gateway applies / interprets the rules. (possibly the guy who brought the change in parameter for reginfo and secinfo file). Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt. This section contains information about the RFC Gateway ACLs, and examples of landscapes and rules.The reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. In addition to proper network separation, access to all message server ports can be controlled on network level by the ACL file specified by profile parameter ms/acl_file or more specific to the internal port by the ACL file specified by profile parameter ms/acl_file_int. From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. It seems to me that the parameter is gw/acl_file instead of ms/acl_file. 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 strongly recommended to use syntax of Version 2, indicated by #VERSION=2in the first line of the files. It is important to mention that the Simulation Mode applies to the registration action only. The related program alias can be found in column TP Name: We can verify if the functionality of these Registered RFC Server Programs is accessible from the AS ABAP by looking for a TCP/IP connection in transaction SM59 with Technical Settings Activation Type = Registered Server Program the corresponding Program ID and either no Gateway Options or connection details to any of the RFC Gateways belonging to the same system set: SAP introduced an internal rule in the reginfo ACL to cover these cases: P TP=* HOST=internal,local ACCESS=internal,local CANCEL=internal,local. Registered Server Programs at a standalone RFC Gateway may be used to integrate 3rd party technologies. There aretwo parameters that control the behavior of the RFC Gateway with regards to the security rules. The simulation mode is a feature which could help to initially create the ACLs. In case the files are maintained, the value of this parameter is irrelevant; gw/sim_mode: activates/deactivates the simulation mode (see the previous section of this WIKI page). The format of the first line is #VERSION=2, all further lines are structured as follows: Here the line starting with P or D, followed by a space or a TAB, has the following meaning: P means that the program is permitted to be started (the same as a line with the old syntax). If this addition is missing, any number of servers with the same ID are allowed to log on. As soon as a program has registered in the gateway, the attributes of the retrieved entry (specifically ACCESS) are passed on to the registered program. The syntax used in the reginfo, secinfo and prxyinfo changed over time. Someone played in between on reginfo file. Falls es in der Queue fehlt, kann diese nicht definiert werden. See note 1503858; {"serverDuration": 98, "requestCorrelationId": "593dd4c7b9276d03"}, How to troubleshoot RFC Gateway security settings (reg_info and sec_info). Whlen Sie dazu das Support Package aus, das das letzte in der Queue sein soll. The RFC Gateway act as an RFC Server which enables RFC function modules to be used by RFC clients. Another example: you have a non-SAP tax system that will register a program at the CI of an SAP ECC system. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. In SAP NetWeaver Application Server ABAP: Every Application Server has a built-in RFC Gateway. With this blogpost series i try to give a comprehensive explanation of the RFC Gateway Security: Part 1: General questions about the RFC Gateway and RFC Gateway security. 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