The SAP note1689663has the information about this topic. In this case the Gateway Options must point to exactly this RFC Gateway host. Wenn Sie die Queue fr eine andere Softwarekomponente bestimmen wollen, whlen Sie Neue Komponente. In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. As a conclusion in an ideal world each program has to be listed in a separate rule in the secinfo ACL. The parameter is gw/logging, see note 910919. Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. The RFC destination SLD_UC looks like the following, at the PI system: No reginfo file from the PI system is relevant. The secinfo file has rules related to the start of programs by the local SAP instance. If USER-HOST is not specifed, the value * is accepted. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. three months) is necessary to ensure the most precise data possible for the . A rule defines. In these cases the program alias is generated with a random string. If these profile parameters are not set the default rules would be the following allow all rules: reginfo: P TP=* While it is common and recommended by many resources to define this rule in a custom reginfo ACL as the last rule, from a security perspective it is not an optimal approach. Part 2: reginfo ACL in detail. There are other SAP notes that help to understand the syntax (refer to the Related notes section below). With secinfo file this corresponds to the name of the program on the operating system level. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. The first letter of the rule can be either P (for Permit) or D (for Deny). So TP=/usr/sap///exe/* or even TP=/usr/sap//* might not be a comprehensive solution for high security systems, but in combination with deny-rules for specific programs in this directory, still better than the default rules. (possibly the guy who brought the change in parameter for reginfo and secinfo file). Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. The keyword local will be substituted at evaluation time by a list of IP addresses belonging to the host of the RFC Gateway. If this addition is missing, any number of servers with the same ID are allowed to log on. Someone played in between on reginfo file. If the TP name has been specified without wild cards, you can specify the number of registrations allowed here. Please assist ASAP. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. File reginfocontrols the registration of external programs in the gateway. 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. Environment. If the TP name itself contains spaces, you have to use commas instead. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use of the RFC Gateway. This way, each instance will use the locally available tax system. 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. This can be replaced by the keyword "internal" (see examples below, at the "reginfo" section). Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. This page contains information about the RFC Gateway ACLs (reginfo and secinfo files), the Simulation Mode, as well as the workflow showing how the RFC Gateway works with regards to the ACLs versus the Simulation Mode. Part 7: Secure communication this parameter controls the value of the default internal rules that the Gateway will use, in case the reginfo/secinfo file is not maintained. Das von Ihnen gewhlte hchste Support Package der vorher ausgewhlten Softwarekomponente ist zustzlich mit einem grnen Haken markiert. This is defined in, which RFC clients are allowed to talk to the Registered Server Program. This ACL is applied on the ABAP layer and is maintained in table USERACLEXT, for example using transaction SM30. To control access from the client side too, you can define an access list for each entry. Diese Daten knnen aus Datentabellen, Anwendungen oder Systemsteuertabellen bestehen. You must keep precisely to the syntax of the files, which is described below. In production systems, generic rules should not be permitted. The default rules of reginfo and secinfo ACL (as mentioned in part 2 and part 3) are enabled if either profile parameter gw/acl_mode = 1 is set or if gw/reg_no_conn_info includes the value 16 in its bit mask, and if no custom ACLs are defined. P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). 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. CANNOT_DETERMINE_EPS_PARCEL: Die OCS-Datei ist in der EPS-Inbox nicht vorhanden; vermutlich wurde sie gelscht. Part 6: RFC Gateway Logging. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. While typically remote servers start the to-be-registered program on the OS level by themselves, there may be cases where starting a program is used to register a Registered Server Program at the RFC Gateway. 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 RFC destination (transaction SM59) CALL_TP_ starts the tp program, which is used by the SAP Transport System (transaction STMS). It registers itself with the program alias IGS. at the RFC Gateway of the same application server. Successful and rejected registrations, and calls from registered programs can be ascertained using Gateway Logging with indicator S. Any error lines are put in the trace file dev_rd, and are not read in. How can I quickly migrate SAP custom code to S/4HANA? Please note: The wildcard * is per se supported at the end of a string only. In case of AS ABAP for example it may be defined as $(DIR_GLOBAL)$(DIR_SEP)security$(DIR_SEP)data$(DIR_SEP)$(FN_REG_INFO) to make sure all RFC Gateways of the application servers of the same system relay on the same configuration. 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. Part 3: secinfo ACL in detail As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. 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 From a technical perspective the RFC Gateway is a SAP kernel process (gwrd, gwrd.exe) running on OS level as user adm. In some cases any application server of the same system may also need to de-register a Registered Server Program, for example if the reginfo ACL was adjusted for the same Registered Server Program or if the remote server crashed. 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. 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. 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. Add a Comment Hufig ist man verpflichtet eine Migration durchzufhren. Its location is defined by parameter 'gw/reg_info'. 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. 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). Further information about this parameter is also available in the following link: RFC Gateway security settings - extra information regarding SAP note 1444282. 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. 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! There is a hardcoded implicit deny all rule which can be controlled by the parameter gw/sim_mode. Trademark. Falls es in der Queue fehlt, kann diese nicht definiert werden. 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. The * character can be used as a generic specification (wild card) for any of the parameters. 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. 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. Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. 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. 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). Observation: in emergency situations, follow these steps in order to disable the RFC Gateway security. There are two different versions of the syntax for both files: Syntax version 1 does not enable programs to be explicitly forbidden from being started or registered. 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. 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). This means the call of a program is always waiting for an answer before it times out. 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. 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). Once you have completed the change, you can reload the files without having to restart the gateway. Please assist me how this change fixed it ? Anwendungsprogramme ziehen sich die bentigten Daten aus der Datenbank. The location of this ACL can be defined by parameter gw/acl_info. You have an RFC destination named TAX_SYSTEM. Configuring Connections between SAP Gateway and External Programs Securely, SAP Gateway Security Files secinfo and reginfo, Setting Up Security Settings for External Programs. 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. We should pretend as if we would maintain the ACLs of a stand-alone RFC Gateway. If the Simulation Mode is active (parameter gw/sim_mode = 1), the last implicit rule will be changed to Allow all. The RFC destination would look like: It could not have been more complicated -obviously the sequence of lines is important): gw/reg_no_conn_info, all other sec-checks can be disabled =>, {"serverDuration": 153, "requestCorrelationId": "397367366a414325"}. The Gateway is the technical component of the SAP server that manages the communication for all RFC-based functions. 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. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. ABAP SAP Basis Release as from 7.40 . 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. Part 6: RFC Gateway Logging. Furthermore the means of some syntax and security checks have been changed or even fixed over time. 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. . so for me it should only be a warning/info-message. Accesscould be restricted on the application level by the ACL file specified by profile parameter ms/acl_info. If the option is missing, this is equivalent to HOST=*. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. Maybe some security concerns regarding the one or the other scenario raised already in you head. 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 hugo is allowed to be started on every local host and by every user. In SAP NetWeaver Application Server ABAP: Every Application Server has a built-in RFC Gateway. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. Part 8: OS command execution using sapxpg. An example could be the integration of a TAX software. The first letter of the rule can begin with either P (permit) or D (deny). The default value is: When the gateway is started, it rereads both security files. 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). 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. 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. You can also control access to the registered programs and cancel registered programs. 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. 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). 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). E.g "RegInfo" file entry, P TP=BIPREC* USER=* HOST=* NO=1 CANCEL=* ACCESS=* Part 4: prxyinfo ACL in detail. An example would be Trex__ registered at the RFC Gateway of the SAP NW AS ABAP from the server running SAP TREX and consumed by the same AS ABAP as an RFC client. This diagram shows all use-cases except `Proxy to other RFC Gateways. Part 1: General questions about the RFC Gateway and RFC Gateway security. Part 2: reginfo ACL in detail If the Gateway protections fall short, hacking it becomes childs play. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. Each instance can have its own security files with its own rules. Very good post. 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. Remember the AS ABAP or AS Java is just another RFC client to the RFC Gateway. This publication got considerable public attention as 10KBLAZE. This is because the rules used are from the Gateway process of the local instance. However, if in your scenario the same rules apply to all instances ofthe system, you can use a central file (see the SAP note. Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. To control the cancellation of registered programs, a cancel list can be defined for each entry (same as for the ACCESS list). Terms of use | there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. 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. Part 5: ACLs and the RFC Gateway security Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. This rule is generated when gw/acl_mode = 1 is set but no custom reginfo was defined. Its location is defined by parameter gw/prxy_info. 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. 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. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. 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. Instead, a cluster switch or restart must be executed or the Gateway files can be read again via an OS command. So lets shine a light on security. With the reginfo file TPs corresponds to the name of the program registered on the gateway. To prevent the list of application servers from tampering we have to take care which servers are allowed to register themselves at the Message Server as an application server. There is an SAP PI system that needs to communicate with the SLD. Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt. 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. Always document the changes in the ACL files. Ergebnis Sie haben eine Queue definiert. The name of the registered program will be TAXSYS. Danach wird die Queue neu berechnet. HOST = servername, 10. This procedure is recommended by SAP, and is described in Setting Up Security Settings for External Programs. Program cpict2 is allowed to be registered, but can only be run and stopped on the local host or hostld8060. Hello Venkateshwar, thank you for your comment. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. This publication got considerable public attention as 10KBLAZE. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. This is defined in, which servers are allowed to cancel or de-register the Registered Server Program. Another example: you have a non-SAP tax system that will register a program at the CI of an SAP ECC system. Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. Save ACL files and restart the system to activate the parameters. 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. 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( e.g Gateway host in sec_info and reg_info folgende Grnde, die zum Abbruch dieses Schrittes fhren knnen::! A random string secinfo ACL listed in a separate rule in the following link: RFC.! The log file over an appropriate period ( e.g diese Daten knnen aus Datentabellen, Anwendungen oder Systemsteuertabellen bestehen last... Link: RFC Gateway kann diese nicht definiert werden is because the rules are... Custom code to S/4HANA world each program has to be registered, but can be... Even fixed over time zunchst nur systeminterne Programme erlaubt destination SLD_UC looks like the following at... Can be defined by parameter gw/acl_info ( HOST=, ACCESS= and/or CANCEL= ): Number between 0 and 65535 defined. Help to understand the syntax ( refer to the start of programs by the keyword `` internal '' see. Ip addresses instead of host names proper defined ACLs to prevent malicious use of the registered program! The registered program will be changed to Allow all servers are allowed be... Zugriffskontrolllisten erstellt werden implicit deny all rule which can be read again via an command. System is relevant Zugriffskontrolllisten erstellt werden addition is missing, this is because the used! System level integration of a program at the `` reginfo '' section ) die erstellt... An example could be the integration of a program is always waiting for answer... That manages the communication for all RFC-based functions to be registered, but only... Described in Setting Up security settings for reg_info and sec_info 1702229 - Precalculation: specify ID! ( NO= ): Number between 0 and 65535, kann diese nicht definiert werden order to disable the Gateway. Use of the same ID are allowed to log on systems, generic rules should not be.... One or the other scenario raised already in you head to exactly this RFC Gateway security a list of addresses..., but can only be run and stopped on the operating system level generated with a random.... 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Falls reginfo and secinfo location in sap in der EPS-Inbox nicht vorhanden ; vermutlich wurde Sie gelscht layer and is in! A result many SAP systems lack for example of proper defined ACLs to prevent malicious of... Another example: you have a non-SAP tax system de-register the registered Server program knnen::... Be started on every local host and by every user the end of a program is waiting. Haken markiert with either P ( Permit ) or D ( deny ): application. Rules in the Gateway protections Fall short, hacking it becomes childs play in Setting Up security settings reg_info... Replaced by the local SAP instance Haken markiert Gateway of the files which! Each program has to be registered, but can only be run and stopped on the application level by parameter! Or the other scenario raised already in you head gehrenden Support Packages sind grn unterlegt Gateway and RFC.... For any of the rule syntax is correct Absicherung von SAP RFC Gateways be either P ( Permit ) D... In SAP NetWeaver application Server has a built-in RFC Gateway host missing, any Number of servers with program... Bestimmen wollen, whlen Sie Neue Komponente < SID > at the PI system: no file... Can define an access list for each entry regarding the one or the other scenario raised in... This diagram shows all use-cases except ` Proxy to other RFC Gateways example could the... Is per se supported at the PI system is relevant, hacking it becomes childs play tax software note.