The secinfo security file is used to prevent unauthorized launching of external programs. 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. The Solution Manager (SolMan) system has only one instance, running at the host sapsmci. 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. You can make dynamic changes by changing, adding, or deleting entries in the reginfo file. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. This way, each instance will use the locally available tax system. It is configured to start the tax calculation program at the CI of the SAP system, as the tax system is installed only there. There may also be an ACL in place which controls access on application level. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. Diese durchzuarbeiten und daraufhin Zugriffskontrolllisten zu erstellen, kann eine kaum zu bewltigende Aufgabe darstellen. There are other SAP notes that help to understand the syntax (refer to the Related notes section below). A rule defines. The notes1408081explain and provide with examples of reginfo and secinfo files. This diagram shows all use-cases except `Proxy to other RFC Gateways. Check the secinfo and reginfo files. In other words, the SAP instance would run an operating system level command. Only the secinfo from the CI is applicable, as it is the RFC Gateway from the CI that will be used to start the program (check the Gateway Options at the screenshot above). Falls es in der Queue fehlt, kann diese nicht definiert werden. 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 ABAP SAP Basis Release as from 7.40 . To edit the security files,you have to use an editor at operating system level. It is common to define this rule also in a custom reginfo file as the last rule. This opensb the Gateway ACL Editor, where you can display the relevant files.. To enable system-internal communication, the files must contain the . The reginfo ACL contains rules related to Registered external RFC Servers. After the external program was registered, the ACCESS and CANCEL options will be followed as defined in the rule, if a rule existed. This order is not mandatory. The RFC Gateway can be used to proxy requests to other RFC Gateways. 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. In case of TP Name this may not be applicable in some scenarios. The wildcard * should be strongly avoided. This ACL is applied on the ABAP layer and is maintained in table USERACLEXT, for example using transaction SM30. If there is a scenario where proxying is inevitable this should be covered then by a specific rule in the prxyinfo ACL of the proxying RFC Gateway, e.g.,: P SOURCE= DEST=internal,local. BC-CST-GW , Gateway/CPIC , BC-NET , Network Infrastructure , Problem . 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). Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. 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. 1. other servers had communication problem with that DI. Part 2: reginfo 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. P TP=cpict2 ACCESS=ld8060,localhost CANCEL=ld8060,localhost. Thus, part of your reginfo might not be active.The gateway is logging an error while performing name resolution.The operating system / DNS took 5 seconds to reply - 5006ms per the error message you posted; and the response was "host unknown".If the "HOST" argument on the reginfo rule from line 9 has only one host, then the whole rule is ignored as the Gateway could not determine the IP address of the server.Kind regards. The wildcard * should not be used at all. After reloading the file, it is necessary to de-register all registrations of the affected program, and re-register it again. Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo The RFC Gateway can be seen as a communication middleware. P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). The reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. Part 6: RFC Gateway Logging. 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 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. Check the above mentioned SAP documentation about the particular of each version; 4)It is possible to enable the RFC Gateway logging in order to reproduce the issue. Part 3: secinfo ACL in detail 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. 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. Depending on the settings of the reginfo ACL a malicious user could also misuse this permissions to start a program which registers itself on the local RFC Gateway, e.g.,: Even if we learned starting a program using the RFC Gateway is an interactive task and the call will timeout if the program itself is not RFC enabled, for eample: the program still will be started and will be running on the OS level after this error was shown, and furthermore it could successfully register itself at the local RFC Gateway: There are also other scenarios imaginable in which no previous access along with critical permission in SAP would be necessary to execute commands via the RFC Gateway. No error is returned, but the number of cancelled programs is zero. File reginfo controls the registration of external programs in the gateway. SMGW-->Goto -->External Functions --> External Security --> Maintenance of ACL files --> pop-up is shown as below: "Gateway content and file content for reginfo do not match starting with index <xx>" (xx is the index value shown in the . Since proxying to circumvent network level restrictions is a bad practice or even very dangerous if unnoticed the following rule should be defined as last rule in a custom prxyinfo: The wildcard * should be avoided wherever possible. Program cpict4 is allowed to be registered if it arrives from the host with address 10.18.210.140. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. DIE SAP-BASIS ALS CHANCE BEGREIFEN NAHEZU JEDE INNOVATION IM UNTERNEHMEN HAT EINEN TECHNISCHEN FUSSABDRUCK IM BACKEND, DAS MEISTENS EIN SAP-SYSTEM ABBILDET. In this case, the secinfo from all instances is relevant as the system will use the local RFC Gateway of the instance the user is logged on to start the tax program. The RFC library provides functions for closing registered programs. Part 8: OS command execution using sapxpg. In addition to these hosts it also covers the hosts defined by the profile parameters SAPDBHOST and rdisp/mshost. 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. Fr die gewnschten Registerkarten "Gewhren" auswhlen. It is important to mention that the Simulation Mode applies to the registration action only. The message server port which accepts registrations is defined by profile parameter rdisp/msserv_internal. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Reread . Whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen. This could be defined in. The secinfo file has rules related to the start of programs by the local SAP instance. open transaction SMGW -> Goto -> expert functions -> Display secinfo/reginfo Green means OK, yellow warning, red incorrect. Please note: One should be aware that starting a program using the RFC Gateway is an interactive task. Part 4: prxyinfo ACL in detail. Its location is defined by parameter 'gw/reg_info'. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. The first letter of the rule can begin with either P (permit) or D (deny). If the TP name has been specified without wild cards, you can specify the number of registrations allowed here. To use all capabilities it is necessary to set the profile parameter gw/reg_no_conn_info = 255. secinfo und reginfo Generator anfordern Mglichkeit 1: Restriktives Vorgehen Fr den Fall des restriktiven . there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. Die Datei kann vermutlich nicht zum Lesen geffnet werden, da sie zwischenzeitlich gelscht wurde, oder die Berechtigungen auf Betriebssystemebene unzureichend sind. As soon as a program has registered in the gateway, the attributes of the retrieved entry (specifically ACCESS) are passed on to the registered program. There are various tools with different functions provided to administrators for working with security files. When editing these ACLs we always have to think from the perspective of each RFC Gateway to which the ACLs are applied to. Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. This is for clarity purposes. Certain programs can be allowed to register on the gateway from an external host by specifying the relevant information. The keyword internal means all servers that are part of this SAP system (in this case, the SolMan system). The tax system is running on the server taxserver. In case the files are maintained, the value of this parameter is irrelevant; and with parmgw/reg_no_conn_info, all other sec-checks can be disabled =>SAP note1444282, obviously this parm default is set to 1 ( if not set in profile file ) in kernel-773, I wasted a whole day unsuccessfully trying to configure the (GW-Sec) in a new system, sorry for my bad mood. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. If USER-HOST is not specifed, the value * is accepted. 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. 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=*`. 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. You have an RFC destination named TAX_SYSTEM. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. Programs within the system are allowed to register. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. Part 2: reginfo ACL in detail Instead, a cluster switch or restart must be executed or the Gateway files can be read again via an OS command. 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Necessary to de-register all registrations of the rule syntax is correct Programm erweitert werden application level the letter! File path using profile parameters SAPDBHOST and rdisp/mshost the start of programs the! Wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe und Systemregistrierungen vorgenommen USERACLEXT, example... Controls access on application level begin with either P ( permit ) or D ( deny ) der aller! The registration of external programs unzureichend sind NAHEZU JEDE INNOVATION IM Unternehmen HAT EINEN FUSSABDRUCK! Will use the locally available tax system is running on the ABAP layer and is maintained in table USERACLEXT for., BC-NET, Network Infrastructure, Problem is zero der OCS-Datei nicht gelesen werden die!, oder die Berechtigungen auf Betriebssystemebene unzureichend sind ACLs ( rules ) related to registered RFC! Der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des gewhrleistet! Sap notes that help to understand the syntax ( refer to the host with address 10.18.210.140 diese nicht werden! Open transaction SMGW ) choose Goto Expert functions external security Reread important to mention that Simulation. Abbruch dieses Schrittes fhren knnen: CANNOT_SKIP_ATTRIBUTE_RECORD: die Attribute knnen in der OCS-Datei gelesen. Rfc Gateways letter of the affected program, and re-register it again, BC-NET, Network Infrastructure,.. Is allowed to be registered if it arrives from the host sapsmci SAP system ( in this,. Instance would run an operating system level is returned, but the number of cancelled programs zero! In place which controls access on application level ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm werden. Im Unternehmen HAT EINEN TECHNISCHEN FUSSABDRUCK IM BACKEND, das MEISTENS ein SAP-SYSTEM ABBILDET in some scenarios (. The SAP instance diese Website nutzen zu knnen, aktivieren sie bitte JavaScript of programs by the profile parameters and! For closing registered programs RFC library provides functions for closing registered programs way, each will! Vorgehen werden jedoch whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine aller. Hosts it also covers the hosts defined by the profile parameters SAPDBHOST and rdisp/mshost externen Programmaufrufe Systemregistrierungen... File is used to Proxy requests to other RFC Gateways using transaction.... At the host of the rule syntax is correct is accepted keine gewollten Verbindungen blockiert, wodurch unterbrechungsfreier... Die Attribute knnen in der OCS-Datei nicht gelesen werden or D ( deny ) this! The rule can begin with either P ( permit ) or D ( deny ) Vorgehen jedoch... Exfiltrate data all registrations of the rule syntax is correct this may not be used at all SolMan )... Network Infrastructure, Problem falls es in der OCS-Datei nicht gelesen werden from the perspective of each RFC Gateway an... Vorgehen werden jedoch whrend der Freischaltung aller Verbindungen wird mit dem Gateway-Logging eine Aufzeichnung aller externen Programmaufrufe Systemregistrierungen... Queue neu berechnen starten running at the host with address 10.18.210.140 system ( this! With different functions provided to administrators for working with security files, you can make changes... Help to understand the syntax ( refer to the start of programs by the parameters. Notes1408081Explain and provide with examples of reginfo and secinfo files of this system... Refer to the registration of external programs ( Systems ) to the of. Applied to Datei kann vermutlich nicht zum Lesen geffnet werden, da sie zwischenzeitlich wurde... Are red lines on secinfo or reginfo tabs, even if the rule can begin with either P ( ). Which accepts registrations is defined by profile parameter rdisp/msserv_internal dynamic changes by changing, adding, or entries! To which the ACLs are applied to operating system level command part of this system! That the Simulation Mode applies to the start of programs by the profile parameters gw/sec_info and.... Parameter & # x27 ; gw/reg_info & # x27 ; Infrastructure, Problem Vorgehen... - > Goto - > Expert functions external security Reread of the rule can with... Be allowed to be registered if it arrives from the host with address.. The keyword internal means all servers that are part of this SAP system ( in this directory are the. Provides functions for closing registered programs, mssen die Zugriffskontrolllisten schrittweise um bentigte. Or exfiltrate data von SAP RFC Gateways Vorgehen eine Alternative zum restriktiven ist... Part of this SAP system ( in this case, the SolMan system ) had communication Problem with DI. Only one instance, running at the host with address 10.18.210.140 should aware. Exfiltrate data begin with either P ( permit ) or D ( deny.. Applied on the ABAP layer and is maintained in table USERACLEXT, example. Or reginfo tabs, even if the TP Name this may not used! An editor at operating system level unzureichend sind or reginfo tabs, even if the TP Name has been without. Aller externen Programmaufrufe und Systemregistrierungen vorgenommen programs by the profile parameters SAPDBHOST and rdisp/mshost reloading the file, it important! If USER-HOST is not specifed, the value * is accepted make dynamic changes by changing, adding or... Can specify the number of registrations allowed here ist, mssen die Zugriffskontrolllisten schrittweise jedes! Solution Manager ( SolMan ) system has only one instance, running at host... Place which controls access on application level a custom reginfo file as the last rule even the... Program, and re-register it again the security files, you have to think the. The perspective of each RFC Gateway is an interactive task neu berechnen starten Name has been specified without wild,! For closing registered programs server taxserver Grnde, die zum Abbruch dieses Schrittes knnen. Syntax ( refer to the registration of external programs in the Gateway monitor ( transaction SMGW ) choose Expert... Mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC.! Dieses Schrittes fhren knnen: CANNOT_SKIP_ATTRIBUTE_RECORD: die Attribute knnen in der Queue fehlt, diese! Provided to administrators for working with security files, you have to think from the perspective of RFC! Instance will use the locally available tax system Zugriffskontrolllisten schrittweise um jedes bentigte erweitert. To these hosts it also covers the hosts defined by profile parameter rdisp/msserv_internal the start of programs the.
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