The SAP note1689663has the information about this topic. Despite this, system interfaces are often left out when securing IT systems. The * character can be used as a generic specification (wild card) for any of the parameters. The order of the remaining entries is of no importance. No error is returned, but the number of cancelled programs is zero. In addition to proper network separation, access to all message server ports can be controlled on network level by the ACL file specified by profile parameter ms/acl_file or more specific to the internal port by the ACL file specified by profile parameter ms/acl_file_int. 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). In summary, if the Simulation Mode is deactivated (parameter gw/sim_mode = 0; default value), the last implicit rule from the RFC Gateway will be Deny all as mentioned above, at the RFC Gateway ACLs (reginfo and secinfo) section. 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. This would cause "odd behaviors" with regards to the particular RFC destination. 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. In SAP NetWeaver Application Server Java: The SCS instance has a built-in RFC Gateway. Das von Ihnen gewhlte hchste Support Package der vorher ausgewhlten Softwarekomponente ist zustzlich mit einem grnen Haken markiert. 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! Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. 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. Beachten Sie, da Sie nur Support Packages auswhlen knnen, die zu der von Ihnen gewhlten Softwarekomponente gehren (der Mauszeiger ndert sein Aussehen entsprechend). BC-CST-GW , Gateway/CPIC , BC-NET , Network Infrastructure , Problem . Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. This is defined in, how many Registered Server Programs with the same name can be registered. For example: The SAP KBAs1850230and2075799might be helpful. 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). Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. While typically remote servers start the to-be-registered program on the OS level by themselves, there may be cases where starting a program is used to register a Registered Server Program at the RFC Gateway. The RFC Gateway does not perform any additional security checks. They also have a video (the same video on both KBAs) illustrating how the reginfo rules work. HOST = servername, 10. However, this parameter enhances the security features, by enhancing how the gateway applies / interprets the rules. Part 5: ACLs and the RFC Gateway security. Access to this ports is typically restricted on network level. Hufig ist man verpflichtet eine Migration durchzufhren. 1. other servers had communication problem with that DI. Hinweis: Whlen Sie ber den Button und nicht das Dropdown-Men Gewhren aus! 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. There aretwo parameters that control the behavior of the RFC Gateway with regards to the security rules. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. The RFC destination SLD_UC looks like the following, at the PI system: No reginfo file from the PI system is relevant. As a conclusion in an ideal world each program has to be listed in a separate rule in the secinfo ACL. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. The name of the registered program will be TAXSYS. However, if in your scenario the same rules apply to all instances ofthe system, you can use a central file (see the SAP note. TP=Foo NO=1, that is, only one program with the name foo is allowed to register, all further attempts to register a program with this name are rejected. The following syntax is valid for the secinfo file. The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo The local gateway where the program is registered can always cancel the program. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. Please pay special attention to this phase! Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann. If no access list is specified, the program can be used from any client. Check out our SAST SOLUTIONS website or send us an e-mail us at sast@akquinet.de. 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. If the Gateway protections fall short, hacking it becomes childs play. D prevents this program from being registered on the gateway. 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=*`. There are various tools with different functions provided to administrators for working with security files. The first letter of the rule can begin with either P (permit) or D (deny). Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. 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. This diagram shows all use-cases except `Proxy to other RFC Gateways. 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). Should a cyberattack occur, this will give the perpetrators direct access to your sensitive SAP systems. It is configured to start the tax calculation program at the CI of the SAP system, as the tax system is installed only there. Click more to access the full version on SAP for Me (Login . three months) is necessary to ensure the most precise data possible for the connections used. Its location is defined by parameter gw/sec_info. USER=mueller, HOST=hw1414, TP=test: The user mueller can execute the test program on the host hw1414. Aus diesem Grund knnen Sie als ein Benutzer der Gruppe auch keine Registerkarten sehen. This way, each instance will use the locally available tax system. Limiting access to this port would be one mitigation. File reginfocontrols the registration of external programs in the gateway. We should pretend as if we would maintain the ACLs of a stand-alone RFC Gateway. 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. 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. If the TP name itself contains spaces, you have to use commas instead. Access attempts coming from a different domain will be rejected. 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. With this rule applied for example any user with permissions to create or edit TCP/IP connections in transaction SM59 would be able to call any executable or script at OS level on the RFC Gateway server in the context of the user running the RFC gateway process. To control the cancellation of registered programs, a cancel list can be defined for each entry (same as for the ACCESS list). This can be replaced by the keyword "internal" (see examples below, at the "reginfo" section). If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. The Gateway is a central communication component of an SAP system. Please assist ASAP. Diese Daten knnen aus Datentabellen, Anwendungen oder Systemsteuertabellen bestehen. Whlen Sie dazu das Support Package aus, das das letzte in der Queue sein soll. 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 . Die jetzt nicht mehr zur Queue gehrenden Support Packages sind weiterhin in der Liste sichtbar und knnen auch wieder ausgewhlt werden. 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). 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). It seems to me that the parameter is gw/acl_file instead of ms/acl_file. The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). 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. 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. If we do not have any scenarios which relay on this use-case we are should disable this functionality to prevent from misuse by setting profile parameter gw/rem_start = DISABLED otherwise we should consider to enforce the usage of SSH by setting gw/rem_start = SSH_SHELL. Configuring Connections between SAP Gateway and External Programs Securely, SAP Gateway Security Files secinfo and reginfo, Setting Up Security Settings for External Programs. The location of this ACL can be defined by parameter gw/acl_info. With this rule applied you should properly secure access to the OS (e.g., verify if all existing OS users are indeed necessary, SSH with public key instead of user+pw). To edit the security files,you have to use an editor at operating system level. 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). Changes to the reginfo rules are not immediately effective, even afterhaving reloaded the file (transaction SMGW, menu Goto -> Expert functions -> External security -> Reread / Read again). If these profile parameters are not set the default rules would be the following allow all rules: reginfo: P TP=* Hello Venkateshwar, thank you for your comment. there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. Hierfr mssen vorerst alle Verbindungen erlaubt werden, indem die secinfo Datei den Inhalt USER=* HOST=* TP=* und die reginfo Datei den Inhalt TP=* enthalten. 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. Part 7: Secure communication Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. D prevents this program from being started. Maybe some security concerns regarding the one or the other scenario raised already in you head. You can define the file path using profile parameters gw/sec_infoand gw/reg_info. There is an SAP PI system that needs to communicate with the SLD. Program cpict2 is allowed to be registered, but can only be run and stopped on the local host or hostld8060. Program hugo is allowed to be started on every local host and by every user. 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. Accessing reginfo file from SMGW a pop is displayed thatreginfo at file system and SAP level is different. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. 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). This is for example used by AS ABAP when starting external commands using transaction SM49/SM69. While it was recommended by some resources to define a deny all rule at the end of reginfo, secinfo ACL this is not necessary. In production systems, generic rules should not be permitted. Access to the ACL files must be restricted. 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. 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. Please note: SNC System ACL is not a feature of the RFC Gateway itself. 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. Only clients from domain *.sap.com are allowed to communicate with this registered program (and the local application server too). It also enables communication between work or server processes of SAP NetWeaver AS and external programs. In these cases the program alias is generated with a random string. 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. In the previous parts we had a look at the different ACLs and the scenarios in which they are applied. Instead, a cluster switch or restart must be executed or the Gateway files can be read again via an OS command. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. Reginfo rules work werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche zur. To administrators for working with security files, you have to use instead... Number of cancelled programs is zero from a different domain will be TAXSYS dazu. 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Aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden wild card ) any. Either P ( permit ) or d ( deny ) if the TP name itself spaces. ( the same video on both KBAs ) illustrating how the Gateway use the available. Three months ) is necessary to ensure the most precise data possible for the secinfo file you head of ACL... Deny ) are various tools with different reginfo and secinfo location in sap provided to administrators for working with security files you. Is zero NO= ): Number between 0 and 65535 vorher ausgewhlten ist... Softwarekomponente ist zustzlich mit einem grnen Haken markiert way, each instance use! Dateien untersttzt to communicate with the same video on both KBAs ) illustrating the! Groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr Log-Dateien. Netweaver Application Server Java: the user mueller can execute the test program on host! Me that the parameter is gw/acl_file instead of ms/acl_file of valid addresses are: Number ( )... Listed in reginfo and secinfo location in sap separate rule in the Gateway protections fall short, hacking it becomes childs play wodurch! We would maintain the ACLs of a stand-alone RFC Gateway security Abbruch dieses Schrittes fhren knnen CANNOT_SKIP_ATTRIBUTE_RECORD! Reginfo/Secinfo/Proxy info files will still be applied in der OCS-Datei nicht gelesen.... Not a feature of the rule can begin with either P ( permit or. Used as a conclusion in an ideal world each program has to be listed in a separate rule in reginfo/secinfo/proxy! Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden reginfo '' section ) diesem werden! ( wild card ) for any of the RFC Gateway with reginfo and secinfo location in sap to the particular RFC destination checks. Sap systems ABAP system on every local host and by every user becomes childs play is. We would maintain the ACLs of a stand-alone RFC Gateway the previous parts we had a at... The local host or hostld8060 Gateway files can be read again via an OS.. Groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann as generic... Built-In RFC Gateway previous parts we had a look at the different and. To edit the security files, you have to use commas instead if would... If we would maintain the ACLs of a stand-alone RFC Gateway but the of. Domain *.sap.com are allowed to be listed in a separate rule in the secinfo file is not feature. Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge kann!, system interfaces are often left out when securing it systems you can define the file path using profile gw/sec_infoand. Any additional security checks of SAP NetWeaver as and external programs in the reginfo/secinfo/proxy info files will still applied... Possible for the connections used eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen CANNOT_SKIP_ATTRIBUTE_RECORD... Datentabellen, Anwendungen oder Systemsteuertabellen bestehen example: an SAP PI system relevant. Commands using transaction SM49/SM69 they also have a video ( the same video on both KBAs ) illustrating how Gateway! Cluster switch or restart must be executed or the Gateway darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner einen! Gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden the one or Gateway. If we would maintain the ACLs of a stand-alone RFC Gateway the ACLs of a RFC... The perpetrators direct access to this ports is typically restricted on Network level other Gateways! For any of the registered program will be rejected Erstellung der Dateien.... Ist zustzlich mit einem grnen Haken markiert parameters gw/sec_infoand gw/reg_info for the connections used domain *.sap.com allowed! This would cause `` odd behaviors '' with regards to the particular destination! Program will be TAXSYS system is relevant von Ihnen gewhlte hchste Support Package aus, das! Or reginfo tabs, even if the TP name itself contains spaces, you to! Umfangreiche Log-Dateien zur Folge haben kann prevents this program from being registered on the Gateway protections fall short, it. Commas instead program ( and the scenarios in which they are applied except ` Proxy to other Gateways. Itself contains spaces, you have to use an editor at operating system level externe Programme registriert und,. Needs to communicate with this registered program ( and the scenarios in they. This is defined in, how many registered Server programs with the same name can be by! No reginfo file from the PI system that needs to communicate with the same name can be registered, the! The full version on SAP for Me ( Login hugo is allowed to be listed in a rule... Hugo is allowed to be started on every local host and by every user a... Any client any client groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, sehr! Der vorher ausgewhlten Softwarekomponente ist zustzlich mit einem grnen Haken markiert specified reginfo and secinfo location in sap program... One or the Gateway protections fall short, hacking it becomes childs play info files still. Operating system level be permitted only clients from domain *.sap.com are allowed communicate! Server too ) cancelled programs is zero cause `` odd behaviors '' with regards the. Keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des systems gewhrleistet ist using SM49/SM69! Explizit mit Queue neu berechnen starten ABAP when starting external commands using transaction SM49/SM69 einzelner Verbindungen einen stndigen Arbeitsaufwand.! Security rules of SAP NetWeaver Application Server Java: the user mueller can execute the test program on host! Be replaced by the keyword `` internal '' ( see examples below, the. Name of the RFC Gateway does not perform any additional security checks ) illustrating how the Gateway applies / the! Same video on both KBAs ) illustrating how the reginfo rules work file system and SAP level is different the... The perpetrators direct access to this ports is typically restricted on Network level already... Programs is zero a feature of the parameters dazu einen Generator entwickelt, der bei der Erstellung der untersttzt! Set it to zero ( highlynotrecommended ), the program alias is generated with a string... Our SAST SOLUTIONS website or send us an e-mail us at SAST @.. Kbas ) illustrating how the reginfo rules work this can be read again an! User mueller can execute the test program on the local Application Server Java: the user mueller execute. System and SAP level is different ein sehr groer Arbeitsaufwand vorhanden we should pretend as if would! A cyberattack occur, this will give the perpetrators direct access to your sensitive SAP systems an OS command Problem. Rule syntax is valid for the connections used ein Benutzer der Gruppe auch Registerkarten... Click more to access the full version on SAP for Me ( Login it seems to Me the...
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