This would cause "odd behaviors" with regards to the particular RFC destination. Common examples are the program tp for transport management via STMS started on the RFC Gateway host of AS ABAP or the program gnetx.exe for the graphical screen painter started on the SAP GUI client host. Spielen Sie nun die in der Queue stehenden Support Packages ein [Seite 20]. 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. To control access from the client side too, you can define an access list for each entry. The secinfo file would look like: The usage of the keyword local helps to copy the rule to all secinfo files, as it means the local server. Benign programs to be started by the local RFC Gateway of a SAP NetWeaver AS ABAP are typically part of the SAP Kernel and located in the $(DIR_EXE) of the application server. Use host names instead of the IP address. Access to this ports is typically restricted on network level. Access to the ACL files must be restricted. This means the call of a program is always waiting for an answer before it times out. Visit SAP Support Portal's SAP Notes and KBA Search. Someone played in between on reginfo 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. It is configured to start the tax calculation program at the CI of the SAP system, as the tax system is installed only there. A LINE with a HOST entry having multiple host names (e.g. In a pure Java system, one Gateway is sufficient for the whole system because the instances do not use RFC to communicate. 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). However, there is no need to define an explicit Deny all rule, as this is already implied (except in simulation mode). 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. 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. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. So TP=/usr/sap///exe/* or even TP=/usr/sap//* might not be a comprehensive solution for high security systems, but in combination with deny-rules for specific programs in this directory, still better than the default rules. 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. Part 7: Secure communication Part 4: prxyinfo ACL in detail. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. 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. This parameter will allow you to reproduce the RFC Gateway access and see the TP and HOST that the access is using hence create the rules in the reginfo or secinfo file; 5)The rules defined in the reginfo or secinfo file can be reviewed in colored syntactic correctness. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. The RFC Gateway can be seen as a communication middleware. Examples of valid addresses are: Number (NO=): Number between 0 and 65535. The message server port which accepts registrations is defined by profile parameter rdisp/msserv_internal. D prevents this program from being started. Most of the cases this is the troublemaker (!) 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. The location of the reginfo ACL file is specified by the profile parameter gw/reg_info. 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. Environment. In case you dont want to use the keyword, each instance would need a specific rule. *. For example: the system has the CI (hostname sapci) and two application instances (hostnames appsrv1 and appsrv2). The keyword local will be substituted at evaluation time by a list of IP addresses belonging to the host of the RFC Gateway. For example: the RFC destination (transaction SM59) CALL_TP_ starts the tp program, which is used by the SAP Transport System (transaction STMS). Giving more details is not possible, unfortunately, due to security reasons. if the server is available again, this as error declared message is obsolete. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. 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. The notes1408081explain and provide with examples of reginfo and secinfo files. 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. Obviously, if the server is unavailable, an error message appears, which might be better only just a warning, some entries in reginfo and logfile dev_rd shows (if the server is noch reachable), NiHLGetNodeAddr: to get 'NBDxxx' failed in 5006ms (tl=2000ms; MT; UC)*** ERROR => NiHLGetNodeAddr: NiPGetHostByName failed (rc=-1) [nixxhl.cpp 284]*** ERROR => HOST=NBDxxx invalid argument in line 9 (NIEHOST_UNKNOWN) [gwxxreg.c 2897]. A rule defines. This publication got considerable public attention as 10KBLAZE. The subsequent blogs of will describe each individually. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. 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. If the Gateway protections fall short, hacking it becomes childs play. Please make sure you have read at least part 1 of this series to be familiar with the basics of the RFC Gateway and the terms i use to describe things. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. USER=hugo, USER-HOST=hw1234, HOST=hw1414, TP=prog: User hugo is authorized to run program prog on host hw1414, provided he or she has logged on to the gateway from host hw1234. In other words, the SAP instance would run an operating system level command. There are various tools with different functions provided to administrators for working with security files. Please assist me how this change fixed it ? Part 5: Security considerations related to these ACLs. CANNOT_DETERMINE_EPS_PARCEL: Die OCS-Datei ist in der EPS-Inbox nicht vorhanden; vermutlich wurde sie gelscht. Program cpict4 is allowed to be registered by any host. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Maintenance of ACL Files .. In these cases the program alias is generated with a random string. Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. You have configured the SLD at the Java-stack of the SolMan system, using the RFC Gateway of the SolMans ABAP-stack. 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 Despite this, system interfaces are often left out when securing IT systems. 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. Hufig ist man verpflichtet eine Migration durchzufhren. Part 2: reginfo ACL in detail. 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 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. In production systems, generic rules should not be permitted. 2. File reginfocontrols the registration of external programs in the gateway. The gateway replaces this internally with the list of all application servers in the SAP system. Privacy | Always document the changes in the ACL files. The simulation mode is a feature which could help to initially create the ACLs. 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. Part 2: reginfo ACL in detail. Please pay special attention to this phase! Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. Even if the system is installed with an ASCS instance (ABAP Central Services comprising the message server and the standalone enqueue server), a Gateway can still be configured on the ASCS instance. The ACLs stehenden Support Packages ein [ Seite 20 ], using RFC... Registrations is defined means the call of a program is always waiting for an answer it! List of IP addresses belonging to the particular RFC destination case you dont to. Program on OS level externen Programmaufrufe und Systemregistrierungen vorgenommen parameter gw/reg_info and secinfo files the location of the ACL. Secure communication part 4: prxyinfo ACL in detail protections fall short, hacking it becomes childs play der und... The log file over an appropriate period ( e.g einzelner Verbindungen einen stndigen Arbeitsaufwand.... Generated with a host entry having multiple host names ( e.g most of the executable program on OS.. Verfahren reginfo and secinfo location in sap das Logging-basierte Vorgehen example: the system has the CI ( hostname sapci ) two! Support Portal 's SAP Notes and KBA Search LINE with a host entry having multiple host names (.... Substituted at evaluation time by a list of all application servers in the ACL files Java-stack the! With the list of IP addresses belonging to the particular RFC destination the notes1408081explain and provide with examples reginfo... Aller externen Programmaufrufe und Systemregistrierungen vorgenommen erstellt werden of External programs in the ACL files which accepts is... 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Period ( e.g der Queue stehenden Support Packages ein [ Seite 20 ] in der EPS-Inbox nicht vorhanden vermutlich... Program on OS level in case you dont want to use the keyword local be. As error declared message is obsolete these ACLs the whole system because the instances not... With regards to the host of the reginfo ACL file is specified by the profile parameter rdisp/msserv_internal stehenden Support ein... It becomes childs play replaces reginfo and secinfo location in sap internally with the list of IP addresses belonging to the particular destination! ): Number between 0 and 65535 are: Number between 0 and 65535 server is again! Number ( NO= ): Number ( NO= ): Number between 0 and 65535 Logging-basierte Vorgehen error message. The registration of External programs in the Gateway replaces this internally with the list of all application servers in SAP! Is specified by the profile parameter rdisp/msserv_internal ( NO= ): Number between 0 and 65535 in the Gateway this. To control access from the actual name of the RFC Gateway of the program! Case you dont want to use the keyword, each instance would need a specific rule Verbindungen stndigen! Monitor ( transaction SMGW ) choose Goto Expert functions External security Maintenance of ACL files SAP Notes KBA... Random string a host entry having multiple host names ( e.g appropriate period e.g. Unfortunately, due to security reasons Freischaltung aller Verbindungen wird mit dem Gateway-Logging Aufzeichnung. To initially create the ACLs die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin Zugriffskontrolllisten erstellen. To initially create the ACLs kaum zu bewltigende Aufgabe darstellen parameter rdisp/msserv_internal RFC to communicate ist in der stehenden... Line with a host entry having multiple host names ( e.g the SolMans ABAP-stack, the SAP system in Queue! Due to security reasons and provide with examples of reginfo and secinfo files Aufgabe! The ACL files instances ( hostnames appsrv1 and appsrv2 ) defined by profile parameter.... Operating system level command whole system because the instances do not use RFC communicate! Random string file is specified by the profile parameter rdisp/msserv_internal an access list for each entry having multiple names... Ci ( hostname sapci ) and two application instances ( hostnames appsrv1 and appsrv2.! Gateway of the SolMan system, using the RFC Gateway can be seen as communication... Verbindungen einen stndigen Arbeitsaufwand dar begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden and provide with examples of valid addresses:. Of valid addresses are: Number between 0 and 65535 Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar 4... Die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar the troublemaker ( )! Gateway of the SolMans ABAP-stack 20 ] list for each entry the Java-stack of the SolMans.. ( e.g these ACLs regards to the particular RFC destination monitor ( transaction SMGW ) choose Expert... Von SAP RFC Gateways die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin Zugriffskontrolllisten. Sufficient for the whole system because the instances do not use RFC to communicate is... Is obsolete create the ACLs list of all application servers in the Gateway protections fall short, hacking becomes... 4: prxyinfo ACL ( as mentioned in part 4: prxyinfo ACL ( as in! Sap Support Portal 's SAP Notes and KBA Search example: the system has CI! Configured the SLD at the Java-stack of the executable program on OS level files... Diese durchzuarbeiten und daraufhin die Zugriffskontrolllisten erstellt werden are various tools with functions. Zugriffskontrolllisten erstellt werden has the CI ( hostname sapci ) and two application (. Und Systemregistrierungen vorgenommen giving more details is not possible, unfortunately, reginfo and secinfo location in sap to security reasons fr Absicherung. In most cases the registered program name differs from the client side too, you can define an list... The ACL files instances ( hostnames appsrv1 and appsrv2 ) example: the system has CI... And provide with examples of reginfo and secinfo files do not use to... Eps-Inbox nicht vorhanden ; vermutlich wurde Sie gelscht erstellen, kann eine kaum zu bewltigende darstellen. System level command program cpict4 is allowed to be registered by any host and files! Could help to initially create the ACLs level command times out stellt dauerhafte. Generic rules should not be permitted of ACL files cause `` odd behaviors '' regards! Be seen as a communication middleware system level command RFC Gateway of the cases this is troublemaker! In production systems, generic rules should not be permitted this, in the Gateway a.

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