reginfo and secinfo location in sap

Its functions are then used by the ABAP system on the same host. This publication got considerable public attention as 10KBLAZE. This is defined by the letter, which servers are allowed to register which program aliases as a Registered external RFC Server. Hello Venkateshwar, thank you for your comment. The following syntax is valid for the secinfo file. this parameter controls the value of the default internal rules that the Gateway will use, in case the reginfo/secinfo file is not maintained. 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. 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. In these cases the program started by the RFC Gateway may also be the program which tries to register to the same RFC Gateway. Observation: in emergency situations, follow these steps in order to disable the RFC Gateway security. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. So lets shine a light on security. (possibly the guy who brought the change in parameter for reginfo and secinfo file). Its location is defined by parameter gw/reg_info. The reginfo rule from the ECCs CI would be: The rule above allows any instance from the ECC system to communicate with the tax system. 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. 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). 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). 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. Durch einen Doppelklick auf eine Zeile erhalten Sie detaillierte Informationen ber die Task- Typen auf den einzelnen Rechnern. DIE SAP-BASIS ALS CHANCE BEGREIFEN NAHEZU JEDE INNOVATION IM UNTERNEHMEN HAT EINEN TECHNISCHEN FUSSABDRUCK IM BACKEND, DAS MEISTENS EIN SAP-SYSTEM ABBILDET. You have a non-SAP tax system that needs to be integrated with SAP. The RFC library provides functions for closing registered programs. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. If the TP name itself contains spaces, you have to use commas instead. The PI system has one Central Instance (CI) running at the server sappici, and one application instance (running at the server sappiapp1). This is a list of host names that must comply with the rules above. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. Accessing reginfo file from SMGW a pop is displayed thatreginfo at file system and SAP level is different. 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. 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 ). In this case, the secinfo from all instances is relevant as the system will use the local RFC Gateway of the instance the user is logged on to start the tax program. All of our custom rules should bee allow-rules. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. Support Packages fr eine ausgewhlte Komponente werden entsprechend ihrer Reihenfolge in die Queue gestellt. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. The * character can be used as a generic specification (wild card) for any of the parameters. The local gateway where the program is registered always has access. For a RFC Gateway of AS Java or a stand-alone RFC Gateway this can be determined with the command-line tool gwmon by running the command gwmon nr= pf= then going to the menu by typing m and displaying the client table by typing 3. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. Further information about this parameter is also available in the following link: RFC Gateway security settings - extra information regarding SAP note 1444282. Wenn Sie die Queue fr eine andere Softwarekomponente bestimmen wollen, whlen Sie Neue Komponente. The RFC destination would look like: The secinfo files from the application instances are not relevant. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. Copyright | 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. Part 3: secinfo ACL in detail. Whlen Sie dazu das Support Package aus, das das letzte in der Queue sein soll. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. Please note: The wildcard * is per se supported at the end of a string only. Every line corresponds one rule. Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. The default configuration of an ASCS has no Gateway. If this addition is missing, any number of servers with the same ID are allowed to log on. Falls es in der Queue fehlt, kann diese nicht definiert werden. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. Only clients from domain *.sap.com are allowed to communicate with this registered program (and the local application server too). Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. Make sure that they are set as per the Notes: Note 1425765 - Generating sec_info reg_info Note 1947412 - MDM Memory increase and RFC connection error 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. This is because the rules used are from the Gateway process of the local instance. The network service that, in turn, manages the RFC communication is provided by the RFC Gateway. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. Part 3: secinfo ACL in detail 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 . Sie knnen anschlieend die Registerkarten auf der CMC-Startseite sehen. Please make sure you have read part 1 4 of this series. A LINE with a HOST entry having multiple host names (e.g. Only clients from the local application server are allowed to communicate with this registered program. How can I quickly migrate SAP custom code to S/4HANA? No error is returned, but the number of cancelled programs is zero. It registers itself with the program alias IGS. at the RFC Gateway of the same application server. In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. 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. 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. Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. You have an RFC destination named TAX_SYSTEM. In case of AS ABAP for example it may be defined as $(DIR_GLOBAL)$(DIR_SEP)security$(DIR_SEP)data$(DIR_SEP)$(FN_PRXY_INFO) to make sure all RFC Gateways of the application servers of the same system relay on the same configuration. In this case the Gateway Options must point to exactly this RFC Gateway host. 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. 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. If the Simulation Mode is active (parameter gw/sim_mode = 1), the last implicit rule will be changed to Allow all. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. The RFC Gateway can be used to proxy requests to other RFC Gateways. Part 8: OS command execution using sapxpg. In SAP NetWeaver Application Server Java: The SCS instance has a built-in RFC Gateway. Since proxying to circumvent network level restrictions is a bad practice or even very dangerous if unnoticed the following rule should be defined as last rule in a custom prxyinfo: The wildcard * should be avoided wherever possible. Furthermore the means of some syntax and security checks have been changed or even fixed over time. If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. You can tighten this authorization check by setting the optional parameter USER-HOST. Access to the ACL files must be restricted. Refer to the SAP Notes 2379350 and2575406 for the details. If no cancel list is specified, any client can cancel the program. All subsequent rules are not even checked. Every attribute should be maintained as specific as possible. Program cpict4 is allowed to be registered if it arrives from the host with address 10.18.210.140. 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). Part 6: RFC Gateway Logging 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. You can define the file path using profile parameters gw/sec_info and gw/reg_info. The prxyinfo file is holding rules controlling which source systems (based on their hostname/ip-address) are allowed to talk to which destination systems (based on their hostname/ip-address) over the current RFC Gateway. Part 5: ACLs and the RFC Gateway security. 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 . Maybe some security concerns regarding the one or the other scenario raised already in you head. The secinfo file is holding rules controlling which programs (based on their executable name or fullpath, if not in $PATH) can be started by which user calling from which host(s) (based on its hostname/ip-address) on which RFC Gateway server(s) (based on their hostname/ip-address). This is for clarity purposes. 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. The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). Please pay special attention to this phase! After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. Save ACL files and restart the system to activate the parameters. 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. For all Gateways, a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available. 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 P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). This is an allow all rule. The secinfosecurity file is used to prevent unauthorized launching of external programs. As separators you can use commas or spaces. Diese Daten knnen aus Datentabellen, Anwendungen oder Systemsteuertabellen bestehen. The other parts are not finished, yet. Depending on the settings of the reginfo ACL a malicious user could also misuse this permissions to start a program which registers itself on the local RFC Gateway, e.g.,: Even if we learned starting a program using the RFC Gateway is an interactive task and the call will timeout if the program itself is not RFC enabled, for eample: the program still will be started and will be running on the OS level after this error was shown, and furthermore it could successfully register itself at the local RFC Gateway: There are also other scenarios imaginable in which no previous access along with critical permission in SAP would be necessary to execute commands via the RFC Gateway. Somit knnen keine externe Programme genutzt werden. 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). What is important here is that the check is made on the basis of hosts and not at user level. 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. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. Please note: The proxying RFC Gateway will additionally check its reginfo and secinfo ACL if the request is permitted. In a pure Java system, one Gateway is sufficient for the whole system because the instances do not use RFC to communicate. Add a Comment 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). In addition, the existing rules on the reginfo/secinfo file will be applied, even on Simulation Mode. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. *. 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). Part 7: Secure communication 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. It is common to define this rule also in a custom reginfo file as the last rule. You can make dynamic changes by changing, adding, or deleting entries in the reginfo file. Evaluate the Gateway log files and create ACL rules. 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 production systems, generic rules should not be permitted. The wildcard * should not be used at all. Part 5: Security considerations related to these ACLs. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. Now 1 RFC has started failing for program not registered. This diagram shows all use-cases except `Proxy to other RFC Gateways. Please follow me to get a notification once i publish the next part of the series. The wildcard * should be strongly avoided. 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. Before jumping to the ACLs themselves, here are a few general tips: The syntax of the rules is documented at the SAP note. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. 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. 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. Host Name (HOST=, ACCESS= and/or CANCEL=): The wildcard character * stands for any host name, *.sap.com for a domain, sapprod for host sapprod. This also includes the loopback address 127.0.0.1 as well as its IPv6 equivalent ::1. For this scenario a custom rule in the reginfo ACL would be necessary, e.g., P TP= HOST= ACCESS=internal,local CANCEL=internal,local,. The RFC destination SLD_UC looks like the following, at the PI system: No reginfo file from the PI system is relevant. The reginfo ACL contains rules related to Registered external RFC Servers. 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. Visit SAP Support Portal's SAP Notes and KBA Search. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. 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. There is an SAP PI system that needs to communicate with the SLD. Systems lack for example of proper defined ACLs to prevent unauthorized launching of external.! Number ( NO= ): number ( NO= ): number ( NO= ): number ( NO= ) number. 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