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 simulation mode is a feature which could help to initially create the ACLs. As we learnt before the reginfo and secinfo are defining rules for very different use-cases, so they are not related. The Solution Manager (SolMan) system has only one instance, running at the host sapsmci. 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. 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). You have configured the SLD at the Java-stack of the SolMan system, using the RFC Gateway of the SolMans ABAP-stack. From a technical perspective the RFC Gateway is a SAP kernel process (gwrd, gwrd.exe) running on OS level as user adm. The very first line of the reginfo/secinfo file must be "#VERSION=2"; Each line must be a complete rule (you cannot break the rule into two or more lines); The RFC Gateway will apply the rules in the same order as they appear in the file, and only the first matching rule will be used (similar to the behavior of a network firewall). The syntax used in the reginfo, secinfo and prxyinfo changed over time. 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. Maybe some security concerns regarding the one or the other scenario raised already in you head. This opensb the Gateway ACL Editor, where you can display the relevant files.. To enable system-internal communication, the files must contain the . Only the first matching rule is used (similarly to how a network firewall behaves). The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo . While it was recommended by some resources to define a deny all rule at the end of reginfo, secinfo ACL this is not necessary. 3. Please assist me how this change fixed it ? Spielen Sie nun die in der Queue stehenden Support Packages ein [Seite 20]. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. 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. 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. After reloading the file, it is necessary to de-register all registrations of the affected program, and re-register it again. 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. Would you like more information on our SAST SUITE or would you like to find out more about ALL ROUND protection of your SAP systems? The Gateway is the technical component of the SAP server that manages the communication for all RFC-based functions. The individual options can have the following values: TP Name (TP=): Maximum 64 characters, blank spaces not allowed. Somit knnen keine externe Programme genutzt werden. Save ACL files and restart the system to activate the parameters. Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. 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. Part 3: secinfo ACL in detail. The secinfo file has rules related to the start of programs by the local SAP instance. Thank you! 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. Someone played in between on reginfo file. This publication got considerable public attention as 10KBLAZE. Use host names instead of the IP address. The Gateway uses the rules in the same order in which they are displayed in the file. Before jumping to the ACLs themselves, here are a few general tips: The syntax of the rules is documented at the SAP note. Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. 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')). This order is not mandatory. Danach wird die Queue neu berechnet. 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"}. So lets shine a light on security. Alerting is not available for unauthorized users. D prevents this program from being started. File reginfo controls the registration of external programs in the gateway. As i suspect it should have been registered from Reginfo file rather than OS. It is configured to start the tax calculation program at the CI of the SAP system, as the tax system is installed only there. The secinfo file from the CI would look like the below: In case you dont want to use the keywords local and internal, youll have to manually specify the hostnames. This could be defined in. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. three months) is necessary to ensure the most precise data possible for the connections used. 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. 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. Hello Venkateshwar, thank you for your comment. Program hugo is allowed to be started on every local host and by every user. The following syntax is valid for the secinfo file. This publication got considerable public attention as 10KBLAZE. Additional ACLs are discussed at this WIKI page. Its location is defined by parameter gw/prxy_info. 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. After implementing this note, modify the Gateway security files "reg_info" and "sec_info" with TP=BIPREC* (Refer notes 614971 and 1069911). Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. 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. Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt. Part 5: ACLs and the RFC Gateway security. 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. When editing these ACLs we always have to think from the perspective of each RFC Gateway to which the ACLs are applied to. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. Please note: The proxying RFC Gateway will additionally check its reginfo and secinfo ACL if the request is permitted. This would cause "odd behaviors" with regards to the particular RFC destination. This ACL is applied on the ABAP layer and is maintained in transaction SNC0. This parameter will enable special settings that should be controlled in the configuration of reginfo file. P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). Hufig ist man verpflichtet eine Migration durchzufhren. This list is gathered from the Message Server every 5 minutes by the report RSMONGWY_SEND_NILIST. The RFC Gateway does not perform any additional security checks. What is important here is that the check is made on the basis of hosts and not at user level. Part 7: Secure communication Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. The subsequent blogs of will describe each individually. It is important to mention that the Simulation Mode applies to the registration action only. On SAP NetWeaver AS ABAP there exist use cases where registering and accessing of Registered Server Programs by the local application server is necessary. 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. RFC had issue in getting registered on DI. There are three places where we can find an RFC Gateway: The RFC Gateway is by default reachable via the services sapgw and sapgws which can be mapped to the ports 33 and 48. If the called program is not an RFC enabled program (compiled with the SAP RFC library) the call will time out, but the program is still left running on the OS level! Please make sure you have read part 1 4 of this series. 2. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. Most of the cases this is the troublemaker (!) Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. 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). RFCs between RFC clients using JCo/NCo or Registered Server Programs and the AS ABAP are typically controlled on network level only. 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. For all Gateways, a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available. Another example would be IGS. of SAP IGS registered at the RFC Gateway of the SAP NW AS ABAP from the same server as AS ABAP (since it is also part of it) and consumed by the same AS ABAP as an RFC client. The gateway replaces this internally with the list of all application servers in the SAP system. USER=mueller, HOST=hw1414, TP=test: The user mueller can execute the test program on the host hw1414. The secinfo security file is used to prevent unauthorized launching of external programs. 2.20) is taken into account only if every comma-separated entry can be resolved into an IP address. For example: The SAP KBAs1850230and2075799might be helpful. In an ideal world each program alias of the relevant Registered Server Programs would be listed in a separate rule, even for registering program aliases from one of the hosts of internal. 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. Should a cyberattack occur, this will give the perpetrators direct access to your sensitive SAP systems. Das Protokoll knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen. This means that the sequence of the rules is very important, especially when using general definitions. File reginfocontrols the registration of external programs in the gateway. In SAP NetWeaver Application Server Java: The SCS instance has a built-in RFC Gateway. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. 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. Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. Alerting is not available for unauthorized users, Right click and copy the link to share this comment. Sie knnen die Queue-Auswahl reduzieren. There are various tools with different functions provided to administrators for working with security files. 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. 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. A combination of these mitigations should be considered in general. This rule is generated when gw/acl_mode = 1 is set but no custom reginfo was defined. 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 other words, the SAP instance would run an operating system level command. 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). Only clients from the local application server are allowed to communicate with this registered program. Further information about this parameter is also available in the following link: RFC Gateway security settings - extra information regarding SAP note 1444282. 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 . All subsequent rules are not checked at all. Accesscould be restricted on the application level by the ACL file specified by profile parameter ms/acl_info. Access attempts coming from a different domain will be rejected. The wild card character * stands for any number of characters; the entry * therefore means no limitation, fo* stands for all names beginning with fo; foo stands precisely for the name foo. Based on the original Gateway log files in the system, default values can be determined and generated for the ACL files directly after the evaluation of the data found. 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. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. It is common to define this rule also in a custom reginfo file as the last rule. Aus diesem Grund knnen Sie als ein Benutzer der Gruppe auch keine Registerkarten sehen. 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. But also in some cases the RFC Gateway itself may 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. Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. In other words, the SAP instance would run an operating system level command. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . Part 5: ACLs and the RFC Gateway security In a pure Java system, one Gateway is sufficient for the whole system because the instances do not use RFC to communicate. Again when a remote server of a Registered Server Program is going to be shutdown due to maintenance it may de-register its program from the RFC Gateway to avoid errors. 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. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. Program cpict4 is allowed to be registered if it arrives from the host with address 10.18.210.140. 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. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. Thus, part of your reginfo might not be active.The gateway is logging an error while performing name resolution.The operating system / DNS took 5 seconds to reply - 5006ms per the error message you posted; and the response was "host unknown".If the "HOST" argument on the reginfo rule from line 9 has only one host, then the whole rule is ignored as the Gateway could not determine the IP address of the server.Kind regards. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. Please note: SNC User ACL is not a feature of the RFC Gateway itself. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. On SAP NetWeaver AS ABAP registering Registered Server Programs byremote servers may be used to integrate 3rd party technologies. 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. 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)). Check the secinfo and reginfo files. 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. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. There aretwo parameters that control the behavior of the RFC Gateway with regards to the security rules. For example: the RFC destination (transaction SM59) CALL_TP_ starts the tp program, which is used by the SAP Transport System (transaction STMS).Before jumping to the ACLs themselves, here are a few general tips: A general reginfo rule definition would be (note that the rule was split into multiple lines for explanation purposes, so it is more easily understood): Usually, ACCESS is a list with at least all SAP servers from this SAP system. All other programs starting with cpict4 are allowed to be started (on every host and by every user). Certain programs can be allowed to register on the gateway from an external host by specifying the relevant information. Part 1: General questions about the RFC Gateway and RFC Gateway security. Fr die gewnschten Registerkarten "Gewhren" auswhlen. You have a non-SAP tax system that needs to be integrated with SAP. If the Simulation Mode is active (parameter gw/sim_mode = 1), the last implicit rule will be changed to Allow all. To control access from the client side too, you can define an access list for each entry. 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. Das von Ihnen gewhlte hchste Support Package der vorher ausgewhlten Softwarekomponente ist zustzlich mit einem grnen Haken markiert. To edit the security files,you have to use an editor at operating system level. Please assist ASAP. P USER=* USER-HOST=internal,local HOST=internal,local TP=*. This can be replaced by the keyword "internal" (see examples below, at the "reginfo" section). 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. The RFC Gateway act as an RFC Server which enables RFC function modules to be used by RFC clients. Here are some examples: At the application server #1, with hostname appsrv1: At the application server #2, with hostname appsrv2: The SAP KBA2145145has a video illustrating how the secinfo rules work. 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. Programs within the system are allowed to register. The parameter is gw/logging, see note 910919. To use all capabilities it is necessary to set the profile parameter gw/reg_no_conn_info = 255. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Maintenance of ACL Files .. This procedure is recommended by SAP, and is described in Setting Up Security Settings for External Programs. The RFC destination would look like: The secinfo files from the application instances are not relevant. Of course the local application server is allowed access. The wildcard * should not be used at all. there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. *. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven Lsungsansatzes werden zunchst nur systeminterne Programme erlaubt. Check out our SAST SOLUTIONS website or send us an e-mail us at sast@akquinet.de. 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. Please note: The wildcard * is per se supported at the end of a string only. HOST = servername, 10. The location of the reginfo ACL file is specified by the profile parameter gw/reg_info.

Permanent Managing Conservatorship Texas, Is Mitch Mcconnell Up For Reelection In 2022, Federal Public Defender Pay Scale, Articles R