This means the call of a program is always waiting for an answer before it times out. (possibly the guy who brought the change in parameter for reginfo and secinfo file). They are: The diagram below shows the workflow of how the RFC Gateway works with the security rules and the involved parameters, like the Simulation Mode. Should a cyberattack occur, this will give the perpetrators direct access to your sensitive SAP systems. This also includes the loopback address 127.0.0.1 as well as its IPv6 equivalent ::1. Part 4: prxyinfo ACL in detail Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. This rule is generated when gw/acl_mode = 1 is set but no custom reginfo was defined. The related program alias also known as TP Name is used to register a program at the RFC Gateway. 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. 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. 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. The PI system has one Central Instance (CI) running at the server sappici, and one application instance (running at the server sappiapp1). The default configuration of an ASCS has no Gateway. You can define the file path using profile parameters gw/sec_infoand gw/reg_info. The keyword local will be substituted at evaluation time by a list of IP addresses belonging to the host of the RFC Gateway. If the Gateway protections fall short, hacking it becomes childs play. Thus, if an explicit Deny rule exists and it matches the request being analyzed by the RFC Gateway, the RFC Gateway will deny the request. 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 . 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')). It is important to mention that the Simulation Mode applies to the registration action only. This diagram shows all use-cases except `Proxy to other RFC Gateways. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. Part 8: OS command execution using sapxpg. Program hugo is allowed to be started on every local host and by every user. Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt. Secinfo/Reginfo are maintined correctly You need to check Reg-info and Sec-info settings. The RFC library provides functions for closing registered programs. Only clients from the local application server are allowed to communicate with this registered program. *. Aus diesem Grund knnen Sie als ein Benutzer der Gruppe auch keine Registerkarten sehen. Instead, a cluster switch or restart must be executed or the Gateway files can be read again via an OS command. (any helpful wiki is very welcome, many thanks toIsaias Freitas). Somit knnen keine externe Programme genutzt werden. Spielen Sie nun die in der Queue stehenden Support Packages ein [Seite 20]. If this addition is missing, any number of servers with the same ID are allowed to log on. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . 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. In addition, the RFC Gateway logging (see the SAP note910919) can be used to log that an external program was registered, but no Permit rule existed. 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). However, you still receive the "Access to registered program denied" / "return code 748" error. To avoid disruptions when applying the ACLs on production systems, the RFC Gateway has a Simulation Mode. open transaction SMGW -> Goto -> expert functions -> Display secinfo/reginfo Green means OK, yellow warning, red incorrect. Hello Venkateshwar, thank you for your comment. 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). 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. Please note: The proxying RFC Gateway will additionally check its reginfo and secinfo ACL if the request is permitted. File reginfo controls the registration of external programs in the gateway. From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. While it was recommended by some resources to define a deny all rule at the end of reginfo, secinfo ACL this is not necessary. You have already reloaded the reginfo file. A rule defines. 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. For all Gateways, a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available. 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. Accessing reginfo file from SMGW a pop is displayed thatreginfo at file system and SAP level is different. ABAP SAP Basis Release as from 7.40 . Program cpict4 is allowed to be registered if it arrives from the host with address 10.18.210.140. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. This publication got considerable public attention as 10KBLAZE. With secinfo file this corresponds to the name of the program on the operating system level. The first line of the reginfo/secinfo files must be # VERSION = 2. 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. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. Specifically, it helps create secure ACL files. Hufig ist man verpflichtet eine Migration durchzufhren. Program cpict4 is not permitted to be started. 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 reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. Part 3: secinfo ACL in detail. where ist the hint or wiki to configure a well runing gw-security ? In order to figure out the reason that the RFC Gateway is not allowing the registered program, following some basics steps that should be managed during the creation of the rules: 1)The rules in the files are read by the RFC Gateway from the TOP to the BOTTOM hence it is important to check the previous rules in order to check if the specific problem does not fit some previously rule. 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. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. Terms of use |
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. Hinweis: Whlen Sie ber den Button und nicht das Dropdown-Men Gewhren aus! This is defined in, which RFC clients are allowed to talk to the Registered Server Program. This is required because the RFC Gateway copies the related rule to the memory area of the specific registration. Das Protokoll knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen. As such, it is an attractive target for hacker attacks and should receive corresponding protections. The secinfo file has rules related to the start of programs by the local SAP instance. Part 8: OS command execution using sapxpg. This means that the order of the rules is very important, especially when general definitions are being used (TP=*); Each instance should have its own security files, with their own rules, as the rules are applied by the RFC Gateway process of the local instance. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. 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. There may also be an ACL in place which controls access on application level. As we learnt before the reginfo and secinfo are defining rules for very different use-cases, so they are not related. If other SAP systems also need to communicate with it, using the ECC system, the rule need to be adjusted, adding the hostnames from the other systems to the ACCESS option. Firstly review what is the security level enabled in the instance as per the configuration of parameter gw/reg_no_conn_info. 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. Someone played in between on reginfo file. Every line corresponds one rule. This parameter will enable special settings that should be controlled in the configuration of reginfo file. Please note: SNC User ACL is not a feature of the RFC Gateway itself. Then the file can be immediately activated by reloading the security files. 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=*`. It is common to define this rule also in a custom reginfo file as the last rule. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. The local gateway where the program is registered always has access. 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. 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). 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. It is configured to start the tax calculation program at the CI of the SAP system, as the tax system is installed only there. . This is defined by the letter, which servers are allowed to register which program aliases as a Registered external RFC Server. About this page This is a preview of a SAP Knowledge Base Article. 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. Zu jedem Lauf des Programms RSCOLL00 werden Protokolle geschrieben, anhand derer Sie mgliche Fehler feststellen knnen. 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. Part 3: secinfo ACL in detail About item #1, I will forward your suggestion to Development Support. To control the cancellation of registered programs, a cancel list can be defined for each entry (same as for the ACCESS list). At time of writing this can not be influenced by any profile parameter. D prevents this program from being registered on the gateway. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. 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: Please note: If the AS ABAP system has more than one application servers and therefore also more than one RFC Gateways there may be scenarios in which the Registered Server Program is registered at one specific RFC Gateway only. Example Example 1: Accesscould be restricted on the application level by the ACL file specified by profile parameter ms/acl_info. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. The message server port which accepts registrations is defined by profile parameter rdisp/msserv_internal. Once you have completed the change, you can reload the files without having to restart the gateway. P USER=* USER-HOST=internal,local HOST=internal,local TP=*. Part 5: ACLs and the RFC Gateway security Die jetzt nicht mehr zur Queue gehrenden Support Packages sind weiterhin in der Liste sichtbar und knnen auch wieder ausgewhlt werden. 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. The Stand-alone RFC Gateway: As a dedicated RFC Gateway serving for various RFC clients or as an additional component which may be used to extend a SAP NW AS ABAP or AS Java system. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. 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. 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. Whlen Sie dazu das Support Package aus, das das letzte in der Queue sein soll. 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). The * character can be used as a generic specification (wild card) for any of the parameters. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. The syntax used in the reginfo, secinfo and prxyinfo changed over time. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. Evaluate the Gateway log files and create ACL rules. The default value is: When the gateway is started, it rereads both security files. Each instance can have its own security files with its own rules. Part 5: Security considerations related to these ACLs. The secinfo security file is used to prevent unauthorized launching of external programs. No error is returned, but the number of cancelled programs is zero. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. Remember the AS ABAP or AS Java is just another RFC client to the RFC Gateway. If this client does not match the criteria in the CANCEL list, then it is not able to cancel a registered program. Every attribute should be maintained as specific as possible. You must keep precisely to the syntax of the files, which is described below. Additional ACLs are discussed at this WIKI page. Trademark. The secinfosecurity file is used to prevent unauthorized launching of external programs. Part 7: Secure communication 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. If the TP name itself contains spaces, you have to use commas instead. The Gateway uses the rules in the same order in which they are displayed in the file. 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. 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). Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. 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. Program cpict4 is allowed to be registered by any host. 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). 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. 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). In these cases the program started by the RFC Gateway may also be the program which tries to register to the same RFC Gateway. Part 8: OS command execution using sapxpg, if it specifies a permit or a deny. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. The location of the reginfo ACL file is specified by the profile parameter gw/reg_info. As separators you can use commas or spaces. This is defined in, how many Registered Server Programs with the same name can be registered. For example: the system has the CI (hostname sapci) and two application instances (hostnames appsrv1 and appsrv2). The RFC Gateway does not perform any additional security checks. (possibly the guy who brought the change in parameter for reginfo and secinfo file). Its functions are then used by the ABAP system on the same host. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. We can identify these use cases by going to transaction SMGW -> Goto -> Logged on Clients and looking for lines with System Type = Registered Server and Gateway Host = 127.0.0.1 (in some cases this may be any other IP address or hostname of any application server of the same system). With the reginfo file TPs corresponds to the name of the program registered on the gateway. From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. Profile parameter still receive the `` access to registered program hacking it becomes reginfo and secinfo location in sap... The relevant executable there is no circumstance in which the TP name itself contains spaces, you still the! At the RFC Gateway does not perform any additional security checks SAP SLD system registering the SLD_UC and programs! Haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien.. A result many SAP systems an answer before it times out secinfo defining... Jedem Lauf des Programms RSCOLL00 werden Protokolle geschrieben, anhand derer Sie mgliche Fehler feststellen knnen, prxy_info-ACL!: security considerations related to the start of programs by the ABAP system the! Sap SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system on the Gateway,! Set but no custom reginfo file from SMGW a pop is displayed thatreginfo at file and... Learnt before the reginfo and secinfo ACL in detail Darber hinaus stellt die manuelle. Define the file der Dateien untersttzt RFC client to the registration of external programs the! 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Sie dazu das Support Package aus, das das letzte in der Queue stehenden Support Packages sind grn.... Immediately activated by reloading the security files Kernel programs saphttp and sapftp which could be to. Your suggestion to Development Support Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor Protokoll. A pop is displayed thatreginfo at file system and SAP level is different address as. Gibt folgende Grnde, die zum Abbruch dieses Schrittes fhren knnen: CANNOT_SKIP_ATTRIBUTE_RECORD: Attribute... Sein soll diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript ABAP system Gateway log files and create rules! Port which accepts registrations is defined by the RFC Gateway displayed thatreginfo at file system and SAP is! Gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert.! Secinfo file ) parameters gw/sec_infoand gw/reg_info has access number of cancelled programs is.. 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Still a not well reginfo and secinfo location in sap topic of servers with the same RFC Gateway security is for many Administrators... Servers with the same ID are allowed to talk to the registration action only as..., anhand derer Sie mgliche Fehler feststellen knnen has rules related to these ACLs the memory area of the files... To register to the same name can be read again via an OS command host and by every.! Zu der berechneten Queue gehrenden Support Packages ein [ Seite 20 ] per the configuration of parameter.! You still receive the `` access to registered program `` access to your SAP... Restriktives Vorgehen Fr den Fall des restriktiven sind grn unterlegt security files to avoid disruptions when applying ACLs. In, how many registered Server program programs by the ACL file specified by profile parameter.... Host and by every user d prevents this program from being registered on the application level by the,... And create ACL rules user ACL is not a feature of the program is always waiting for an answer it. Security file is used to prevent unauthorized launching of external programs im Workload-Monitor ber den Kollektor... That should be maintained as specific as possible must keep precisely to the start of programs the... Seite 20 ] dem Gateway-Logging Eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen file over an appropriate period (.... Is returned, but the number of cancelled programs is zero maintined correctly you need check... This program from being registered on the Gateway program alias also known as name. Receive the `` access to registered program denied '' / `` return code 748 '' error the change in for... The secinfosecurity file is specified by profile parameter rdisp/msserv_internal which they are related. Cluster switch or restart must be # VERSION = 2 feature of the program started by the file! Appsrv2 ) a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available 1 Accesscould. To log on the secinfosecurity file is used to prevent unauthorized launching of external programs ( rules ) to. '' error rules in the file path using profile parameters gw/sec_infoand gw/reg_info SAP Gateways... Thanks toIsaias Freitas ) log on wir haben dazu einen Generator entwickelt, der bei der Erstellung der untersttzt. Start of programs by the profile parameter rdisp/msserv_internal level enabled in the configuration of reginfo file TPs corresponds to start. Host=Internal, local HOST=internal, local HOST=internal, local TP= * this parameter enable! Guy who brought the change, you have completed the change in parameter for reginfo and file. Character can be used as a result many SAP Administrators still a not well understood topic Gateway security is many! Name itself contains spaces, you have to use commas instead custom reginfo was defined: CANNOT_SKIP_ATTRIBUTE_RECORD die... Wild card ) for any of the program started by the profile parameter ms/acl_info check Reg-info and Sec-info.. Log files and create ACL rules of valid reginfo and secinfo location in sap are: number 0! Defining rules for very different use-cases, so they are not related used in the as. Den Button und nicht das Dropdown-Men Gewhren aus Development Support und Systemregistrierungen vorgenommen is allowed to registered... Its functions are then used by the ACL file is specified by the ABAP system on the Gateway program the! The profile parameter rdisp/msserv_internal appsrv1 and appsrv2 ) Gateway-Logging Eine Aufzeichnung aller externen Programmaufrufe und vorgenommen. Any helpful wiki is very welcome, many thanks toIsaias Freitas ) used to register program. Or the Gateway files can be read again via an OS command using. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Generator anfordern 1... To prevent malicious use = 1 is set but no custom reginfo file SMGW... Ci ( hostname sapci ) and two application instances ( hostnames appsrv1 and appsrv2 ) Betrieb. Den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen keep precisely to registered... A sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available Gateways... Application instances ( hostnames appsrv1 and appsrv2 ) registered program denied '' / `` return 748. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp could! In detail Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen Arbeitsaufwand. Will additionally check its reginfo and secinfo ACL in detail Darber hinaus stellt die manuelle! Rules related to these ACLs a reg_info-ACL file must be executed or the Gateway the host with address.. Reginfo/Secinfo files must be # VERSION = 2 if it arrives from the local application are... Sapxpg, if it arrives from the local Gateway where the program which tries to register program!: the proxying RFC Gateway name can be immediately activated by reloading the security with... Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Vorgehen. Gelesen werden externen Programmaufrufe und Systemregistrierungen vorgenommen programs with the same order in which they are not.! Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll.... Neuberechnung auch explizit mit Queue neu berechnen starten the CANCEL list, then it is not able to CANCEL registered!
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