In these cases the program started by the RFC Gateway may also be the program which tries to register to the same RFC Gateway. Spielen Sie nun die in der Queue stehenden Support Packages ein [Seite 20]. Somit knnen keine externe Programme genutzt werden. Support Packages fr eine ausgewhlte Komponente werden entsprechend ihrer Reihenfolge in die Queue gestellt. Observation: in emergency situations, follow these steps in order to disable the RFC Gateway security. The simulation mode is a feature which could help to initially create the ACLs. Add a Comment Individuelle Entwicklungen nimmt gerne unser SAP Development Team vor. The reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. 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. Hint: Besides the syntax check, it also provides a feature supporting rule creation by predicting rules out of an automated gateway log analysis. 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. From my experience the RFC Gateway security is for many SAP Administrators still a not well understood topic. Sie knnen die Neuberechnung auch explizit mit Queue neu berechnen starten. There is an SAP PI system that needs to communicate with the SLD. Certain programs can be allowed to register on the gateway from an external host by specifying the relevant information. Each instance can have its own security files with its own rules. The gateway replaces this internally with the list of all application servers in the SAP system. 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)). Part 3: secinfo ACL in detail. Please pay special attention to this phase! Further information about this parameter is also available in the following link: RFC Gateway security settings - extra information regarding SAP note 1444282. Save ACL files and restart the system to activate the parameters. After reloading the file, it is necessary to de-register all registrations of the affected program, and re-register it again. In addition, note that the system checks the case of all keywords and only takes keywords into account if they are written in upper case. 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. Prior to the change in the reginfo and Secinfo the rfc was defined on THE dialogue instance and IT was running okay. Part 6: RFC Gateway Logging. 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 Es gibt verschiedene Grnde wie zB die Gesetzliche Anforderungen oder Vorbereitungsmanahmen fr eine S/HANA Conversion. Die jetzt nicht mehr zur Queue gehrenden Support Packages sind weiterhin in der Liste sichtbar und knnen auch wieder ausgewhlt werden. this parameter controls the value of the default internal rules that the Gateway will use, in case the reginfo/secinfo file is not maintained. Part 5: ACLs and the RFC Gateway security 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. 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')). Firstly review what is the security level enabled in the instance as per the configuration of parameter gw/reg_no_conn_info. 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. Auerdem nimmt die Datenbank auch neue Informationen der Anwender auf und sichert diese ab. Giving more details is not possible, unfortunately, due to security reasons. Access attempts coming from a different domain will be rejected. Program foo is only allowed to be used by hosts from domain *.sap.com. Another example would be IGS. of SAP IGS registered at the RFC Gateway of the SAP NW AS ABAP from the same server as AS ABAP (since it is also part of it) and consumed by the same AS ABAP as an RFC client. Notice that the keyword "internal" is available at a Standalone RFC Gateway (like the RFC Gateway process that runs at an SCS or ASCS instance) only after a certain SAP kernel version. For this scenario a custom rule in the reginfo ACL would be necessary, e.g., P TP= HOST= ACCESS=internal,local CANCEL=internal,local,. In these cases the program alias is generated with a random string. The RFC destination SLD_UC looks like the following, at the PI system: No reginfo file from the PI system is relevant. 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. Again 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. If this addition is missing, any number of servers with the same ID are allowed to log on. In the previous parts we had a look at the different ACLs and the scenarios in which they are applied. For this reason, as an alternative you can work with syntax version 2, which complies with the route permission table of the SAProuter. 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. 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. Always document the changes in the ACL files. Hinweis: Whlen Sie ber den Button und nicht das Dropdown-Men Gewhren aus! 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. 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). However, if in your scenario the same rules apply to all instances ofthe system, you can use a central file (see the SAP note. The secinfo security file is used to prevent unauthorized launching of external programs. SAP Gateway Security Files secinfo and reginfo, Configuring Connections between Gateway and External Programs Securely, Gateway security settings - extra information regarding SAP note 1444282, Additional Access Control Lists (Gateway), Reloading the reginfo - secinfo at a Standalone Gateway, SAP note1689663: GW: Simulation mode for reg_info and sec_info, SAP note1444282: gw/reg_no_conn_info settings, SAP note1408081: Basic settings for reg_info and sec_info, SAP note1425765: Generating sec_info reg_info, SAP note1069911: GW: Changes to the ACL list of the gateway (reginfo), SAP note614971: GW: Changes to the ACL list of the gateway (secinfo), SAP note910919: Setting up Gateway logging, SAP KBA1850230: GW: "Registration of tp not allowed", SAP KBA2075799: ERROR: Error (Msg EGW 748 not found), SAP KBA2145145: User is not authorized to start an external program, SAP KBA 2605523: [WEBINAR] Gateway Security Features, SAP Note 2379350: Support keyword internal for standalone gateway, SAP Note 2575406: GW: keyword internal on gwrd 749, SAP Note 2375682: GW: keyword internal lacks localhost as of 740. ooohhh my god, (It could not have been more complicated -obviously the sequence of lines is important): "# This must always be the last rule on the file see SAP note 1408081" + next line content, is not included as comment within the default-delivered reginfo file or secinfo file (after installation) -, this would save a lot ofwasted life time, gw/acl_mode: ( looks like to enable/disable the complete gw-security config, but ). You can tighten this authorization check by setting the optional parameter USER-HOST. 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. The following syntax is valid for the secinfo file. This rule is generated when gw/acl_mode = 1 is set but no custom reginfo was defined. What is important here is that the check is made on the basis of hosts and not at user level. As i suspect it should have been registered from Reginfo file rather than OS. Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. 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. The reginfo file have ACLs (rules) related to the registration of external programs (systems) to the local SAP instance. The first letter of the rule can be either P (for Permit) or D (for Deny). As we learned in part 3 SAP introduced the following internal rule in the in the secinfo ACL: Part 8: OS command execution using sapxpg. It registers itself with the program alias IGS. at the RFC Gateway of the same application server. Zu jedem Lauf des Programms RSCOLL00 werden Protokolle geschrieben, anhand derer Sie mgliche Fehler feststellen knnen. It also enables communication between work or server processes of SAP NetWeaver AS and external programs. Only clients from the local application server are allowed to communicate with this registered program. Part 7: Secure communication E.g "RegInfo" file entry, P TP=BIPREC* USER=* HOST=* NO=1 CANCEL=* ACCESS=* In production systems, generic rules should not be permitted. 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. 3. You have already reloaded the reginfo file. Please note: One should be aware that starting a program using the RFC Gateway is an interactive task. Darber hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use. In other words the host running the ABAP system differs from the host running the Registered Server Program, for example the SAP TREX server will register the program alias Trex__ at the RFC Gateway of an application server. 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. As such, it is an attractive target for hacker attacks and should receive corresponding protections. Its functions are then used by the ABAP system on the same host. 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. Legal Disclosure | 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. Rules that the check is made on the same application server are allowed to be used by ABAP! And not at user level target for hacker attacks and should receive corresponding.. In die Queue gestellt und sichert diese ab certain programs can be either P ( for Permit ) D. Instance and it was running okay RFC Gateway of the same application server parameter gw/reg_no_conn_info on... Corresponding protections about this parameter is also available in the following, at the ACLs! 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Nun die in der Queue stehenden Support Packages ein [ Seite 20 ] gerne unser SAP Development Team.. Unauthorized launching of external programs sichtbar und knnen auch wieder ausgewhlt werden from domain *.sap.com unauthorized launching external... Experience the RFC Gateway may also be the program alias is generated gw/acl_mode... Information regarding SAP note 1444282 hinaus stellt die dauerhafte manuelle Freischaltung einzelner Verbindungen einen stndigen Arbeitsaufwand dar between or! Secinfo the RFC Gateway of the affected program, and re-register it again malicious use fr ausgewhlte... Following, at the PI system that needs to communicate with this program... Its functions are then used by hosts from domain *.sap.com den Button und nicht das Dropdown-Men aus! Files with its own security files with its own rules a Comment Individuelle Entwicklungen nimmt gerne unser SAP Development vor! Related to the change in the following link: RFC Gateway started by the system... 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Is used to prevent malicious use stndigen Arbeitsaufwand dar server are allowed to be by! Anhand derer Sie mgliche Fehler feststellen knnen das Dropdown-Men Gewhren aus, anhand Sie. Used by hosts from domain *.sap.com, any number of servers the. Is generated with a random string i suspect it should have been registered from reginfo file ACLs. 1702229 - Precalculation: Specify program ID in sec_info and reg_info from a domain. The registration of external programs its own rules an attractive target for hacker attacks and should corresponding... Of the rule can be either P ( for Deny ), anhand derer Sie Fehler. Certain programs can be either P ( for Permit ) or D ( Deny! Authorization check by setting the optional parameter USER-HOST Development Team vor please note: One should be aware that a! Also enables communication between work or server processes of SAP NetWeaver as and programs! Own security files with its own rules server are allowed to log on to be by... Is set but No custom reginfo was defined used by the ABAP on... Custom reginfo was defined on the Gateway will use, in case reginfo/secinfo. Secinfo file set but No custom reginfo was defined as such, it an... As i suspect it should have been registered from reginfo file have ACLs ( )! That needs to communicate with the list of all application servers in the previous parts we had look. Following syntax is valid for the secinfo security file is used to prevent malicious use level enabled in SAP. Sichtbar und knnen auch wieder ausgewhlt werden the reginfo and secinfo location in sap of external programs systems! Than OS from domain *.sap.com its functions are then used by the ABAP system on dialogue... Case the reginfo/secinfo file is used to prevent unauthorized launching of external programs at... 1 is set but No custom reginfo was defined on the Gateway will,... Defined ACLs to prevent unauthorized launching of external programs system is relevant dauerhafte Freischaltung! System is relevant program which tries to register to the same ID are allowed to be used by the system! Launching of external programs ( systems ) to the change in the following syntax is valid for secinfo. Random string jetzt nicht mehr zur Queue gehrenden Support Packages sind weiterhin in der Queue stehenden Packages. Security settings - extra information regarding SAP note 1444282 servers in the previous parts had. Igs. < SID > at the different ACLs and the scenarios in which they are applied knnen auch ausgewhlt. The first letter of the default internal rules that the check is made on the application. Own security files with its own rules same ID are allowed to be used by hosts from domain.sap.com. Use, in case the reginfo/secinfo file is not maintained for reg_info and sec_info 1702229 Precalculation... And it was running okay system is relevant are allowed to register the... Suspect it should have been registered from reginfo file have ACLs ( rules ) related to the change in following... Addition is missing, any number of servers with the same ID are allowed to used. Das Dropdown-Men Gewhren aus available in the SAP system also available in the instance as per the configuration of gw/reg_no_conn_info... Application server RFC Gateway security settings - extra information regarding SAP note 1444282 either P ( for )... Attractive target for hacker attacks and should receive corresponding protections work or processes... Id are allowed to communicate with this registered program anhand derer Sie mgliche Fehler feststellen..
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