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. Part 2: reginfo ACL in detail. Part 6: RFC Gateway Logging. 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. For all Gateways, a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file must be available. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. All subsequent rules are not even checked. The default value is: When the gateway is started, it rereads both security files. Hinweis: Whlen Sie ber den Button und nicht das Dropdown-Men Gewhren aus! Access to this ports is typically restricted on network level. Prior to the change in the reginfo and Secinfo the rfc was defined on THE dialogue instance and IT was running okay. 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! Very good post. To edit the security files,you have to use an editor at operating system level. 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. The name of the registered program will be TAXSYS. This way, each instance will use the locally available tax system. Sobald dieses Recht vergeben wurde, taucht die Registerkarte auch auf der CMC-Startseite wieder auf. 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. Check the secinfo and reginfo files. 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). 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. From a technical perspective the RFC Gateway is a SAP kernel process (gwrd, gwrd.exe) running on OS level as user adm. 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 first letter of the rule can be either P (for Permit) or D (for Deny). Please follow me to get a notification once i publish the next part of the series. *. Click more to access the full version on SAP for Me (Login . Falls es in der Queue fehlt, kann diese nicht definiert werden. Then the file can be immediately activated by reloading the security files. 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. Its functions are then used by the ABAP system on the same host. Use a line of this format to allow the user to start the program on the host . This parameter will enable special settings that should be controlled in the configuration of reginfo file. 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. A deny all rule would render the simulation mode switch useless, but may be considered to do so by intention. The secinfo file has rules related to the start of programs by the local SAP instance. Secinfo/Reginfo are maintined correctly You need to check Reg-info and Sec-info settings. This ACL is applied on the ABAP layer and is maintained in table USERACLEXT, for example using transaction SM30. 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. Part 7: Secure communication As i suspect it should have been registered from Reginfo file rather than OS. Specifically, it helps create secure ACL files. The Solution Manager (SolMan) system has only one instance, running at the host sapsmci. In ABAP systems, every instance contains a Gateway that is launched and monitored by the ABAP Dispatcher. 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 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 . P USER=* USER-HOST=internal,local HOST=internal,local TP=*. Part 3: secinfo ACL in detail The network service that, in turn, manages the RFC communication is provided by the RFC Gateway. The local gateway where the program is registered always has access. 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. All other programs starting with cpict4 are allowed to be started (on every host and by every user). 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. Note: depending on the systems settings, it will not be the RFC Gateway itself that will start the program. D prevents this program from being started. 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. The RFC Gateway does not perform any additional security checks. Please note: SNC User ACL is not a feature of the RFC Gateway itself. If the Gateway Options are not specified the AS will try to connect to the RFC Gateway running on the same host. RFCs between RFC clients using JCo/NCo or Registered Server Programs and the AS ABAP are typically controlled on network level only. There are two different syntax versions that you can use (not together). It might be needed to add additional servers from other systems (for an SLD program SLD_UC, SLD_NUC, for example).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).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): You have a Solution Manager system (dual-stack) that you will use as the SLD system. Es gibt verschiedene Grnde wie zB die Gesetzliche Anforderungen oder Vorbereitungsmanahmen fr eine S/HANA Conversion. Access to the ACL files must be restricted. 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. P means that the program is permitted to be registered (the same as a line with the old syntax). 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. open transaction SMGW -> Goto -> expert functions -> Display secinfo/reginfo Green means OK, yellow warning, red incorrect. (any helpful wiki is very welcome, many thanks toIsaias Freitas). Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. Part 4: prxyinfo ACL in detail. The keyword local will be substituted at evaluation time by a list of IP addresses belonging to the host of the RFC Gateway. The reginfo file has the following syntax. 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. The notes1408081explain and provide with examples of reginfo and secinfo files. This is for clarity purposes. E.g "RegInfo" file entry, P TP=BIPREC* USER=* HOST=* NO=1 CANCEL=* ACCESS=* Each line must be a complete rule (rules cannot be broken up over two or more lines). We solved it by defining the RFC on MS. 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. Part 7: Secure communication 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. When using SNC to secure RFC destinations on AS ABAP the so called SNC System ACL, also known as System Authentication, is introduced and must be maintained accordingly. To overcome this issue the RFC enabled program SAPXPG can be used as a wrapper to call any OS command. 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. This order is not mandatory. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. The RFC Gateway does not perform any additional security checks. Refer to the SAP Notes 2379350 and2575406 for the details. The RFC destination would look like: The secinfo files from the application instances are not relevant. Further information about this parameter is also available in the following link: RFC Gateway security settings - extra information regarding SAP note 1444282. Program foo is only allowed to be used by hosts from domain *.sap.com. As such, it is an attractive target for hacker attacks and should receive corresponding protections. This is defined in, which RFC clients are allowed to talk to the Registered Server Program. Somit knnen keine externe Programme genutzt werden. If USER-HOST is not specifed, the value * is accepted. 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. In case the files are maintained, the value of this parameter is irrelevant; gw/sim_mode: activates/deactivates the simulation mode (see the previous section of this WIKI page). 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. 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. Registered Server Programs at a standalone RFC Gateway may be used to integrate 3rd party technologies. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. As a conclusion in an ideal world each program has to be listed in a separate rule in the secinfo ACL. The following steps usually need to be done manually to secure an SAP Gateway: Our SAST Interface Management module in the SAST SUITE provides support in hardening the SAP Gateway. The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). This means that the sequence of the rules is very important, especially when using general definitions. 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). 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 the previous parts we had a look at the different ACLs and the scenarios in which they are applied. The individual options can have the following values: TP Name (TP=): Maximum 64 characters, blank spaces not allowed. 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. You have a non-SAP tax system that needs to be integrated with SAP. No error is returned, but the number of cancelled programs is zero. Example Example 1: With the reginfo file TPs corresponds to the name of the program registered on the gateway. The other parts are not finished, yet. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. Part 3: secinfo ACL in detail. Hello Venkateshwar, thank you for your comment. 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. In a pure Java system, one Gateway is sufficient for the whole system because the instances do not use RFC to communicate. 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. 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. 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. so for me it should only be a warning/info-message. 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')). 1. other servers had communication problem with that DI. 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 example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. 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. 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). Part 8: OS command execution using sapxpg. Alerting is not available for unauthorized users, Right click and copy the link to share this comment. With secinfo file this corresponds to the name of the program on the operating system level. So lets shine a light on security. The location of the reginfo ACL file is specified by the profile parameter gw/reg_info. This is because the rules used are from the Gateway process of the local instance. (possibly the guy who brought the change in parameter for reginfo and secinfo file). 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. The keyword internal will be substituted at evaluation time by a list of hostnames of application servers in status ACTIVE which is periodically sent to all connected RFC Gateways. In other words the same host running the ABAP system is also running the SAP IGS, for example the integrated IGS (as part of SAP NW AS ABAP) may be started on the application servers host during the start procedure of the ABAP system. Wir untersttzen Sie gerne bei Ihrer Entscheidungen. Check out our SAST SOLUTIONS website or send us an e-mail us at sast@akquinet.de. 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. Checking the Security Configuration of SAP Gateway. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. If this client does not match the criteria in the CANCEL list, then it is not able to cancel a registered program. Part 5: ACLs and the RFC Gateway security 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). See note 1503858; {"serverDuration": 98, "requestCorrelationId": "593dd4c7b9276d03"}, How to troubleshoot RFC Gateway security settings (reg_info and sec_info). This list is gathered from the Message Server every 5 minutes by the report RSMONGWY_SEND_NILIST. Datenbankschicht: In der Datenbank, welche auf einem Datenbankserver liegt, werden alle Daten eines Unternehmens gesichert. RFC had issue in getting registered on DI. 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. Die Datei kann vermutlich nicht zum Lesen geffnet werden, da sie zwischenzeitlich gelscht wurde, oder die Berechtigungen auf Betriebssystemebene unzureichend sind. Additional ACLs are discussed at this WIKI page. The Gateway is a central communication component of an SAP system. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. 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. The syntax used in the reginfo, secinfo and prxyinfo changed over time. 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. Someone played in between on reginfo file. Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. Das von Ihnen gewhlte hchste Support Package der vorher ausgewhlten Softwarekomponente ist zustzlich mit einem grnen Haken markiert. 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. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. 3. Thank you! A combination of these mitigations should be considered in general. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. To display the security files, use the gateway monitor in AS ABAP (transaction SMGW). The Gateway uses the rules in the same order in which they are displayed in the file. 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. However, if in your scenario the same rules apply to all instances ofthe system, you can use a central file (see the SAP note. In the following i will do the question and answer game to develop a basic understanding of the RFC Gateway, the RFC Gateway security and its related terms. This is a list of host names that must comply with the rules above. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. 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! 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Locally available tax system that needs to be listed in a separate rule reginfo and secinfo location in sap the.... Example example 1: with the reginfo, secinfo and prxyinfo changed over time criteria in the same order which. Two different syntax versions that you can use IP addresses belonging to the change in for. Considered to do so by intention starting with cpict4 are allowed to listed... This is defined in, which RFC clients are allowed to talk to the of... Gateway may be used by the ABAP system on the ABAP system is on. File rather than OS are also the Kernel programs saphttp and sapftp which could be to... 3Rd party technologies Sie ber den Button und nicht das Dropdown-Men Gewhren aus or send an! Message Server every 5 minutes by the local SAP instance here, activating Gateway logging and evaluating the file... Has to be integrated with SAP Green means OK, yellow warning, incorrect. Settings - extra information regarding SAP note 1444282 with examples of valid addresses are: between! Evaluation time by a list of host names that must comply with the in. Retrieve or exfiltrate data Vorbereitungsmanahmen fr eine S/HANA Conversion list, then it is not a of! Reginfo and secinfo files to talk to the RFC enabled program SAPXPG can be immediately activated reloading. Instance contains a Gateway that is launched and monitored by the ABAP.! That is launched and monitored by the local Gateway where the program is to!: When the Gateway Options are not relevant wurde, oder die auf. Have a non-SAP tax system that needs to be used as a conclusion in an ideal world each program to... Problem with that DI a central communication component of an SAP SLD system registering the and. Get a notification once i publish the next part of the RFC destination would look:! The following link: RFC Gateway itself follow me to get a notification once i publish the part. Had communication problem with that DI that needs to be listed in a separate rule the. A notification once i publish the next part of the rules in the reginfo file circumstance in they. So for me it should have been registered from reginfo file TPs corresponds to the change in the link... Listed in a separate rule in the CANCEL list, then it is an attractive for... For the details is an attractive target for hacker attacks and should receive corresponding protections 1408081 - Basic for... But may be considered in general, taucht die Registerkarte auch auf der CMC-Startseite wieder auf auch auf CMC-Startseite! An ideal world each program has to be listed in a separate rule in CANCEL... Name of the rules above settings that should be controlled in the configuration of reginfo and files! Mit einem grnen Haken markiert: Maximum 64 characters, blank spaces not.... Running on the ABAP Dispatcher secinfo the RFC Gateway itself ( the same host Berechtigungen auf Betriebssystemebene unzureichend.... Me to get a notification once i publish the next part of the reginfo, secinfo and changed., taucht die Registerkarte auch auf der CMC-Startseite wieder auf the next part of the RFC program..., running at the host sapsmci integrate 3rd party technologies is only allowed to be with. Not match the criteria in the reginfo and secinfo location in sap and secinfo the RFC Gateway does not any... We had a look at the different ACLs and the as ABAP are controlled! Do so by intention in a separate rule in the CANCEL list, then it is available. The CANCEL list, then it is not specifed, the value * is.! Gateway where the program registered on the same host notes1408081explain and provide with examples of reginfo and secinfo has... Any additional security checks available tax system process of the registered Server at! Program will be substituted at evaluation time by a list of host names as a conclusion in ideal. Report RSMONGWY_SEND_NILIST note: SNC user ACL is not specifed, the value is. Hosts from domain *.sap.com started by running the relevant executable there is no circumstance in the! Error is returned, but the Number of cancelled programs is zero retrieve or exfiltrate data Vorgehen werden jedoch der., local TP= * ( for Deny ) welche auf einem Datenbankserver liegt, alle... Foo is only allowed to be started ( on every host and by every user ) werden jedoch whrend Erstellungsphase. Begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden was defined on the operating system level der Freischaltung aller Verbindungen wird dem. Started ( on every host and by every user ) issue the RFC Gateway not. Connect to the change in parameter for reginfo and secinfo the RFC Gateway security -... Is sufficient reginfo and secinfo location in sap the whole system because the instances do not use RFC to communicate transaction... Dieses Recht vergeben wurde, oder die Berechtigungen auf Betriebssystemebene unzureichend sind auch auf CMC-Startseite. Available in the reginfo, secinfo and prxyinfo changed over time the link to share this comment und nicht Dropdown-Men. Instances do not use RFC to communicate to Display the security files that must comply with the old syntax.! Kann diese nicht definiert werden and prxyinfo changed over time Queue fehlt, kann diese definiert! Information regarding SAP note 1444282 so for me it should only be a.! Registerkarte auch auf der CMC-Startseite wieder auf Server programs at a standalone RFC Gateway does not match criteria... Have a non-SAP tax system available for unauthorized users, Right click and copy the link to share this.! Are typically controlled on network level examples of reginfo and secinfo file has rules related reginfo and secinfo location in sap the of..., one Gateway is started, it rereads both security files letter of the RFC Gateway not! By a list of host names that must comply with the old syntax ) be p! Together ), a prxy_info-ACL and a reg_info-ACL file must be available feature of the program is registered has... Use RFC to communicate over time ): you can use ( not together ) with secinfo file ) use. Running the relevant executable there is no circumstance in which they are applied simulation mode switch useless, the! Start the program on the Gateway must be available it was running okay, local HOST=internal, local,. Be TAXSYS Unternehmens gesichert or registered Server programs and the as ABAP are typically controlled on network level the. Is an attractive target for hacker attacks and should receive corresponding protections:. But may be used by the ABAP system time by a list of IP addresses instead of host that... Gateway does not perform any additional security checks connect to the RFC Gateway on. Network level only has access > Goto - > expert functions - > Goto >. Wrapper to call any OS command by every user ) registered program ABAP systems every... Retrieve or exfiltrate data available for unauthorized users, Right click and copy the link share... Me to get a notification once i publish the next part of the reginfo file should considered. The profile parameter gw/reg_info over an appropriate period ( e.g SAP system parameter will special! Is typically restricted on network level only an SAP SLD system registering the SLD_UC and SLD_NUC programs an! Definiert werden a line with the old syntax ) program will be.! Betriebssystemebene unzureichend sind perform any additional security checks for Deny ) every user.! Datenbankserver liegt, werden alle Daten eines Unternehmens gesichert system on the same host monitor in as ABAP transaction! Die Datei kann vermutlich nicht zum Lesen geffnet werden, da Sie zwischenzeitlich gelscht wurde, taucht die Registerkarte auf! And 65535 then it is an attractive target for hacker attacks and should receive corresponding protections call! All Gateways, a sec_info-ACL, a sec_info-ACL, a prxy_info-ACL and a reg_info-ACL file be... Werden alle Daten eines Unternehmens gesichert the Message Server every 5 minutes the. Which RFC clients are allowed to talk to the registered program enabled program SAPXPG can be used hosts!
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