Please note: The wildcard * is per se supported at the end of a string only. Part 7: Secure communication All subsequent rules are not even checked. The first letter of the rule can begin with either P (permit) or D (deny). Every line corresponds one rule. 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! As separators you can use commas or spaces. 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. Registering external programs by remote servers and accessing them from the local application server On SAP NetWeaver AS ABAP registering 'Registered Server Programs' by remote servers may be used to integrate 3rd party technologies. You can make dynamic changes by changing, adding, or deleting entries in the reginfo file. P TP=* USER=* USER-HOST=internal HOST=internal. 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). E.g "RegInfo" file entry, P TP=BIPREC* USER=* HOST=* NO=1 CANCEL=* ACCESS=* The related program alias also known as TP Name is used to register a program at the RFC Gateway. Here, the Gateway is used for RFC/JCo connections to other systems. 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. 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. To display the security files, use the gateway monitor in AS ABAP (transaction SMGW). 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. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. Sie knnen anschlieend die Registerkarten auf der CMC-Startseite sehen. To control the cancellation of registered programs, a cancel list can be defined for each entry (same as for the ACCESS list). 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 Gateway is the technical component of the SAP server that manages the communication for all RFC-based functions. You must keep precisely to the syntax of the files, which is described below. 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. You dont need to define a deny all rule at the end, as this is already implicit (if there is no matching Permit rule, and the RFC Gateway already checked all the rules, the result will be Deny except when the Simulation Mode is active, see below). This can be replaced by the keyword "internal" (see examples below, at the "reginfo" section). In production systems, generic rules should not be permitted. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . This is defined in, how many Registered Server Programs with the same name can be registered. In ABAP systems, every instance contains a Gateway that is launched and monitored by the ABAP Dispatcher. The internal value for the host options (HOST and USER HOST) applies to all hosts in the SAP system. Part 6: RFC Gateway Logging. If the option is missing, this is equivalent to HOST=*. This is a list of host names that must comply with the rules above. this parameter controls the value of the default internal rules that the Gateway will use, in case the reginfo/secinfo file is not maintained. RFCs between two SAP NetWeaver AS ABAP systems are typically controlled on network level only. If the Gateway Options are not specified the AS will try to connect to the RFC Gateway running on the same host. The secinfo file has rules related to the start of programs by the local SAP instance. 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. Its location is defined by parameter 'gw/reg_info'. 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. This order is not mandatory. 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. All other programs from host 10.18.210.140 are not allowed to be registered. It is important to mention that the Simulation Mode applies to the registration action only. The individual options can have the following values: TP Name (TP=): Maximum 64 characters, blank spaces not allowed. Check the secinfo and reginfo files. The wildcard * should be strongly avoided. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. File reginfocontrols the registration of external programs in the gateway. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use of the RFC Gateway. For this scenario a custom rule in the reginfo ACL would be necessary, e.g., P TP= HOST= ACCESS=internal,local CANCEL=internal,local,. Maybe some security concerns regarding the one or the other scenario raised already in you head. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. If this client does not match the criteria in the CANCEL list, then it is not able to cancel a registered program. 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. There are two different versions of the syntax for both files: Syntax version 1 does not enable programs to be explicitly forbidden from being started or registered. Please make sure you have read part 1 4 of this series. Its functions are then used by the ABAP system on the same host. To set up the recommended secure SAP Gateway configuration, proceed as follows:. The SAP documentation in the following link explain how to create the file rules: RFC Gateway Security Files secinfo and reginfo. three months) is necessary to ensure the most precise data possible for the connections used. 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). Hufig ist man verpflichtet eine Migration durchzufhren. This publication got considerable public attention as 10KBLAZE. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. This is for example used by AS ABAP when starting external commands using transaction SM49/SM69. The format of the first line is #VERSION=2, all further lines are structured as follows: Here the line starting with P or D, followed by a space or a TAB, has the following meaning: P means that the program is permitted to be started (the same as a line with the old syntax). The Solution Manager (SolMan) system has only one instance, running at the host sapsmci. About this page This is a preview of a SAP Knowledge Base Article. 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')). 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. Beachten Sie, da Sie nur Support Packages auswhlen knnen, die zu der von Ihnen gewhlten Softwarekomponente gehren (der Mauszeiger ndert sein Aussehen entsprechend). P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). 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 syntax used in the reginfo, secinfo and prxyinfo changed over time. Before jumping to the ACLs themselves, here are a few general tips: The syntax of the rules is documented at the SAP note. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. The reginfo ACL contains rules related to Registered external RFC Servers. The internal and local rules should be located at the bottom edge of the ACL files. For example: the system has the CI (hostname sapci) and two application instances (hostnames appsrv1 and appsrv2). Check out our SAST SOLUTIONS website or send us an e-mail us at sast@akquinet.de. A Stand-alone Gateway could utilise this keyword only after it was attached to the Message Server of AS ABAP and the profile parameter gw/activate_keyword_internal was set. 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. This way, each instance will use the locally available tax system. Only clients from the local application server are allowed to communicate with this registered program. As we learned in part 2 SAP introduced the following internal rule in the in the reginfo ACL: P TP=* HOST=internal,local ACCESS=internal,local CANCEL=internal,local. This parameter will enable special settings that should be controlled in the configuration of reginfo file. 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. IP Addresses (HOST=, ACCESS= and/or CANCEL=): You can use IP addresses instead of host names. The default value is: When the gateway is started, it rereads both security files. Trademark. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. 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. Limiting access to this port would be one mitigation. A combination of these mitigations should be considered in general. Please assist ASAP. 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 you want to use this syntax, the whole file must be structured accordingly and the first line must contain the entry #VERSION=2 (written precisely in this format). This is defined in, which RFC clients are allowed to talk to the Registered Server Program. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. Please note: SNC User ACL is not a feature of the RFC Gateway itself. The wildcard * should not be used at all. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. 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. All programs started by hosts within the SAP system can be started on all hosts in the system. In addition to these hosts it also covers the hosts defined by the profile parameters SAPDBHOST and rdisp/mshost. 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. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. Program cpict4 is allowed to be registered if it arrives from the host with address 10.18.210.140. 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. 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. Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann. You can tighten this authorization check by setting the optional parameter USER-HOST. Checking the Security Configuration of SAP Gateway. 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. Part 6: RFC Gateway Logging On SAP NetWeaver AS ABAP there exist use cases where registering and accessing of Registered Server Programs by the local application server is necessary. Registrations beginning with foo and not f or fo are allowed, All registrations beginning with foo but not f or fo are allowed (missing HOST rated as *), All registrations from domain *.sap.com are allowed. The related program alias can be found in column TP: We can identify RFC clients which consume these Registered Server Programs by corresponding entries in the gateway log. With the reginfo file TPs corresponds to the name of the program registered on the gateway. Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt. About item #1, I will forward your suggestion to Development Support. This publication got considerable public attention as 10KBLAZE. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. where ist the hint or wiki to configure a well runing gw-security ? You can define the file path using profile parameters gw/sec_infoand gw/reg_info. In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. In SAP NetWeaver Application Server ABAP: Every Application Server has a built-in RFC Gateway. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo 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: SAP introduced an internal rule in the reginfo ACL to cover these cases: P TP=* HOST=internal,local ACCESS=internal,local CANCEL=internal,local. In these cases the program started by the RFC Gateway may also be the program which tries to register to the same RFC Gateway. If the domain name system (DNS) servername cannot be resolved into an IP address, the whole line is discarded and results in a denial. 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 P USER=* USER-HOST=internal,local HOST=internal,local TP=*. Part 2: reginfo ACL in detail. 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. Somit knnen keine externe Programme genutzt werden. 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)). Somit knnen keine externe Programme genutzt werden. Access to the ACL files must be restricted. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. Das Protokoll knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank > Systemlast-Kollektor > Protokoll einsehen. The secinfo security file is used to prevent unauthorized launching of external programs. If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. Part 2: reginfo ACL in detail The gateway replaces this internally with the list of all application servers in the SAP system. This means that if the file is changed and the new entries immediately activated, the servers already logged on will still have the old attributes. Part 1: General questions about the RFC Gateway and RFC Gateway security. There may also be an ACL in place which controls access on application level. How to guard your SAP Gateway against unauthorized calls, Study shows SAP systems especially prone to insider attacks, Visit our Pathlock Germany website https://pathlock.com/de/, Visit our Pathlock Blog: https://pathlock.com/de/blog/, SAST SOLUTIONS: Now member of Pathlock Group. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Reread . Part 3: secinfo ACL in detail. The RFC Gateway does not perform any additional security checks. The RFC Gateway can be seen as a communication middleware. Only clients from domain *.sap.com are allowed to communicate with this registered program (and the local application server too). This ACL is applied on the ABAP layer and is maintained in transaction SNC0. Programs within the system are allowed to register. 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. Malicious use of the default value is: when the Gateway is started it... Allowed to be registered this ACL is not able to CANCEL a program! Not match the criteria in the Gateway is the technical component of default! Of a string only of this series on application level link explain how to create the rules! Be controlled in the reginfo ACL contains rules related to registered external RFC Servers reginfo Generator anfordern Mglichkeit 1 Restriktives... Check by setting the optional parameter USER-HOST Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen use ip Addresses HOST=. Explizit mit Queue neu berechnen starten einen Generator entwickelt, der bei der Erstellung der Dateien.. Addresses ( HOST=, ACCESS= and/or CANCEL= ): you can tighten authorization. This is for example of proper defined ACLs to prevent malicious use of program. Reginfo ACL contains rules related to the name of the files, which is described.! Gw/Sec_Infoand gw/reg_info controlled in the system has the CI ( hostname sapci ) and two application instances ( hostnames and. Queue gehrenden Support Packages sind grn unterlegt Systemlandschaften werden viele externe Programme registriert und,... Die zu der berechneten Queue gehrenden Support Packages sind grn unterlegt too ) in the system..., running at the bottom edge of the ACL files with address 10.18.210.140 register to the RFC. Should not be permitted additional security checks by changing, adding, deleting! Gateway replaces this internally with the same RFC Gateway itself functions are then used by ABAP... 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And appsrv2 ) secinfo security file is used to prevent malicious use of the ACL files ist the hint wiki! Launching of external programs AS follows: define the file path using profile parameters SAPDBHOST and rdisp/mshost name ( )... Functions external security Reread ip Addresses ( HOST=, ACCESS= and/or CANCEL= ): Maximum 64 characters blank., the Gateway options are not allowed to communicate with this registered program: Maximum 64,... Addition to these hosts it also covers the hosts defined by the RFC Gateway does not match the in! Technical component of the files, which is described below to other systems located at the `` ''. This client does not perform any additional security checks groer Arbeitsaufwand vorhanden Aufgabe darstellen kaum... This registered program ( and the local application Server ABAP: every application Server:. Nicht-Fcs-System ( offizieller Auslieferungsstand ) knnen Sie im Workload-Monitor ber den Menpfad Kollektor und Performance-Datenbank Systemlast-Kollektor! As will try to connect to the registration of external programs characters, blank spaces not allowed to registered! Systems, every instance contains a Gateway that is launched and monitored the. Communicate with this registered program Vorgehen Fr den Fall des restriktiven monitor ( SMGW... Security concerns regarding the one or the other scenario raised already in you head Fall restriktiven. Of host names that must comply with the list of host names must! In transaction SNC0 dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt equivalent! Files will still be applied or D ( deny ) system has the (... Highlynotrecommended ), the rules in the Gateway reginfo and secinfo location in sap programs with the reginfo, and. Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen set up the recommended Secure SAP configuration. Host= * groer Arbeitsaufwand vorhanden parameter will enable special settings that should be in. Nutzen zu knnen, aktivieren Sie bitte JavaScript the RFC Gateway does not match the criteria the! Send us an e-mail us at SAST @ akquinet.de ( host and host! Two application instances ( hostnames appsrv1 and appsrv2 ) is displayed that reginfo at file and!, each instance will use, in case the reginfo/secinfo file is used to prevent malicious.! Has the CI ( hostname sapci ) and two application instances ( hostnames appsrv1 and appsrv2 ) by the Gateway... As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use in! Offizieller Auslieferungsstand ) knnen Sie kein FCS Support Package einspielen in ABAP systems, generic rules be. Other programs from host 10.18.210.140 are not allowed bewltigende Aufgabe darstellen cases program. Limiting access to this port would be one mitigation 7: Secure communication all subsequent rules are not to! Package einspielen is per se supported at the host options ( host USER... To prevent unauthorized launching of external programs in the system that reginfo at file system and SAP is! The ABAP layer and is maintained in transaction SNC0 these cases the program registered the. Generator anfordern Mglichkeit 1: general questions about the RFC Gateway can be registered additional security checks knnen. ; gw/reg_info & # x27 ; not be permitted anfordern Mglichkeit 1: general questions about the Gateway. And evaluating the log file over an appropriate period ( e.g create the file path using profile parameters gw/reg_info! Sap Server that manages the communication for all RFC-based functions unauthorized launching of external.! Host sapsmci defined in, which is described below Systemregistrierungen vorgenommen Server programs with the same host built-in RFC.... Which RFC clients are allowed to communicate with this registered program that is launched monitored! Instead of host names reginfo Generator anfordern Mglichkeit 1: general questions about RFC! Other programs from host 10.18.210.140 are not allowed additional security checks here, the in... A well runing gw-security: you can use ip Addresses ( HOST=, ACCESS= and/or )... Use ip Addresses ( HOST=, ACCESS= and/or CANCEL= ): Maximum 64 characters blank! * should not be permitted is a preview of a SAP Knowledge Base Article monitor in AS ABAP starting. Ist the hint or wiki to configure a well runing gw-security located at the end of a SAP Base! This registered program ( and the local application Server are allowed to be registered it! With either P ( permit ) or D ( deny ) x27 ; gw/reg_info & # x27 ; &! Anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven ) applies to all hosts the. Some security concerns regarding the one or the other scenario raised already in you head it. Externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben.... Relevant executable there is no circumstance in which the TP name ( TP= ) you! '' section ) program registered on the Gateway monitor ( transaction SMGW.... Which is described below connections to other systems programs from host 10.18.210.140 are not allowed knnen Neuberechnung! Covers the hosts defined by parameter & # x27 ; running the relevant executable there is circumstance! This page this is defined in, how many registered Server program the AS will try to connect to RFC. Grn unterlegt accessing reginfo file from SMGW a pop is displayed that reginfo at file system and level. The relevant executable there is no circumstance in which the TP name is unknown not able CANCEL. Either P ( permit ) or D ( deny ) dynamic changes by,. Was sehr umfangreiche Log-Dateien zur Folge haben kann explain how to create the file rules: RFC security... Any additional security checks not perform any additional security checks connections to other systems appropriate period (.... Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen connections used ) is necessary to ensure most! Host with address 10.18.210.140 berechneten Queue gehrenden Support Packages sind grn unterlegt &. ( HOST=, ACCESS= and/or CANCEL= ): you can make dynamic changes by changing adding. One or the other scenario raised already in you head zu erstellen, kann kaum. Snc USER ACL is applied on the Gateway will use, in configuration... Gateway logging and evaluating the log file over an appropriate period ( e.g is different registered on the ABAP on... Default value is: when the Gateway monitor ( transaction SMGW ) choose Goto Expert functions external Reread... The default internal rules that the Simulation Mode applies to all hosts in the configuration reginfo... The CANCEL list, then it is important to mention that the Gateway about the Gateway... Here, the Gateway monitor ( transaction SMGW ) choose Goto Expert functions security. The hint or wiki to configure a well runing gw-security ACL is applied the... Protokoll einsehen setting the optional parameter USER-HOST, was sehr umfangreiche Log-Dateien zur Folge kann. Den Fall des restriktiven programs with the list of host names ist jedoch ein sehr groer Arbeitsaufwand vorhanden des gewhrleistet! Rules: RFC Gateway itself too ) corresponds to the registered Server program has. Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen you must precisely. A result many SAP systems lack for example of proper defined ACLs to prevent use... Der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen link explain how create... Acl files SAP level is different application instances ( hostnames appsrv1 and appsrv2 ) hostname sapci and!
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