File reginfo controls the registration of external programs in the gateway. Die erstellten Log-Dateien knnen im Anschluss begutachtet und daraufhin die Zugriffskontrolllisten erstellt werden. Its location is defined by parameter gw/prxy_info. where ist the hint or wiki to configure a well runing gw-security ? 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. This ACL is applied on the ABAP layer and is maintained in transaction SNC0. If you set it to zero (highlynotrecommended), the rules in the reginfo/secinfo/proxy info files will still be applied. As we learned in part 4 SAP introduced the following internal rule in the in the prxyinfo ACL: Besttigen Sie den auftauchenden Hinweis und vergeben Sie fr die gewnschten Gruppen zumindest das folgende Recht: Allgemein --> Allgemein --> Objekte Anzeigen. Alerting is not available for unauthorized users. 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). Please note: In most cases the registered program name differs from the actual name of the executable program on OS level. Unfortunately, in this directory are also the Kernel programs saphttp and sapftp which could be utilized to retrieve or exfiltrate data. 2.20) is taken into account only if every comma-separated entry can be resolved into an IP address. (possibly the guy who brought the change in parameter for reginfo and secinfo file). 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. Accessing reginfo file from SMGW a pop is displayed that reginfo at file system and SAP level is different. If the domain name system (DNS) servername cannot be resolved into an IP address, the whole line is discarded and results in a denial. To control access from the client side too, you can define an access list for each entry. P SOURCE=* DEST=*. 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). Program cpict4 is not permitted to be started. Click more to access the full version on SAP for Me (Login . The SAP documentation in the following link explain how to create the file rules: RFC Gateway Security Files secinfo and reginfo. there are RED lines on secinfo or reginfo tabs, even if the rule syntax is correct. Bei groen Systemlandschaften ist dieses Verfahren sehr aufwndig. In einem Nicht-FCS-System (offizieller Auslieferungsstand) knnen Sie kein FCS Support Package einspielen. The RFC Gateway act as an RFC Server which enables RFC function modules to be used by RFC clients. The location of this ACL can be defined by parameter gw/acl_info. Part 3: secinfo ACL in detail. Please assist ASAP. P TP= HOST= ACCESS=,, CANCEL=,local, Please update links for all parts (currently only 1 &2 are working). If this addition is missing, any number of servers with the same ID are allowed to log on. 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. 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). In SAP NetWeaver Application Server ABAP: Every Application Server has a built-in RFC Gateway. if the server is available again, this as error declared message is obsolete. 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). gw/acl_mode: this parameter controls the value of the default internal rules that the RFC Gateway will use, in case the reginfo/secinfo file is not maintained. Only clients from the local application server are allowed to communicate with this registered program. 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. Please follow me to get a notification once i publish the next part of the series. You can also control access to the registered programs and cancel registered programs. Part 3: secinfo ACL in detail. The RFC Gateway hands over the request from the RFC client to the dispatcher which assigns it to a work process (AS ABAP) or to a server process (AS Java). In einer Dialogbox knnen Sie nun definieren, welche Aktionen aufgezeichnet werden sollen. 2. 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. Individuelle Entwicklungen nimmt gerne unser SAP Development Team vor. It is strongly recommended to use syntax of Version 2, indicated by #VERSION=2in the first line of the files. As such, it is an attractive target for hacker attacks and should receive corresponding protections. With this rule applied any RFC enabled program on any of the servers covered by the keyword internal is able to register itself at the RFC Gateway independent from which user started the corresponding executable on OS level (again refer to 10KBLAZE). 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. Certain programs can be allowed to register on the gateway from an external host by specifying the relevant information. 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. Here, activating Gateway logging and evaluating the log file over an appropriate period (e.g. The secinfosecurity file is used to prevent unauthorized launching of external programs. When editing these ACLs we always have to think from the perspective of each RFC Gateway to which the ACLs are applied to. To do this, in the gateway monitor (transaction SMGW) choose Goto Expert Functions External Security Reread . Auch hier ist jedoch ein sehr groer Arbeitsaufwand vorhanden. The location of the reginfo ACL file is specified by the profile parameter gw/reg_info. If no access list is specified, the program can be used from any client. For this scenario a custom rule in the reginfo ACL would be necessary, e.g., P TP= HOST= ACCESS=internal,local CANCEL=internal,local,. Add a Comment Besonders bei groen Systemlandschaften werden viele externe Programme registriert und ausgefhrt, was sehr umfangreiche Log-Dateien zur Folge haben kann. 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. All of our custom rules should bee allow-rules. All other programs starting with cpict4 are allowed to be started (on every host and by every user). At time of writing this can not be influenced by any profile parameter. 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. Refer to the SAP Notes 2379350 and2575406 for the details. 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 . Please make sure you have read part 1 4 of this series. Durch einen Doppelklick auf eine Zeile erhalten Sie detaillierte Informationen ber die Task- Typen auf den einzelnen Rechnern. As separators you can use commas or spaces. RFCs between RFC clients using JCo/NCo or Registered Server Programs and the AS ABAP are typically controlled on network level only. Part 3: secinfo ACL in detail The internal and local rules should be located at the bottom edge of the ACL files. Part 7: Secure communication The solution is to stop the SLD program, and start it again (in other words, de-register the program, and re-register it). The default value is: gw/sec_info = $(DIR_DATA)/secinfo gw/reg_info = $(DIR_DATA)/reginfo Bei diesem Vorgehen werden jedoch whrend der Erstellungsphase keine gewollten Verbindungen blockiert, wodurch ein unterbrechungsfreier Betrieb des Systems gewhrleistet ist. This is defined in, which servers are allowed to cancel or de-register the Registered Server Program. Since programs are started by running the relevant executable there is no circumstance in which the TP Name is unknown. If this client does not match the criteria in the CANCEL list, then it is not able to cancel a registered program. Programs within the system are allowed to register. Please note: The proxying RFC Gateway will additionally check its reginfo and secinfo ACL if the request is permitted. P means that the program is permitted to be registered (the same as a line with the old syntax). Part 4: prxyinfo ACL in detail Check the secinfo and reginfo files. About the second comment and the error messages, those are messages related to DNS lookup.I believe that these are raised as errors because they have occurred during the parsing of the reginfo file. Part 4: prxyinfo ACL in detail. Part 8: OS command execution using sapxpg. 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. Secinfo/Reginfo are maintined correctly You need to check Reg-info and Sec-info settings. It is common to define this rule also in a custom reginfo file as the last rule. Access to this ports is typically restricted on network level. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. Furthermore the means of some syntax and security checks have been changed or even fixed over time. This means that the order of the rules is very important, especially when general definitions are being used (TP=*); Each instance should have its own security files, with their own rules, as the rules are applied by the RFC Gateway process of the local instance. This also includes the loopback address 127.0.0.1 as well as its IPv6 equivalent ::1. The RFC Gateway allows external RFC Server programs (also known as Registered Server or Registered Server Program) to register to itself and allows RFC clients to consume the functions offered by these programs. Each instance can have its own security files with its own rules. 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. The wildcard * should be strongly avoided. Would you like more information on our SAST SUITE or would you like to find out more about ALL ROUND protection of your SAP systems? This is because the rules used are from the Gateway process of the local instance. 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. 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. The default rule in prxyinfo ACL (as mentioned in part 4) is enabled if no custom ACL is defined. The keyword internal means all servers that are part of this SAP system (in this case, the SolMan system). Then the file can be immediately activated by reloading the security files. 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. Falls es in der Queue fehlt, kann diese nicht definiert werden. Mglichkeit 2: Logging-basiertes Vorgehen Eine Alternative zum restriktiven Verfahren ist das Logging-basierte Vorgehen. secinfo: P TP=* USER=* USER-HOST=* HOST=*. 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. However, if in your scenario the same rules apply to all instances ofthe system, you can use a central file (see the SAP note. This is an allow all rule. 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. Da das aber gewnscht ist, mssen die Zugriffskontrolllisten schrittweise um jedes bentigte Programm erweitert werden. In these cases the program alias is generated with a random string. Um diese Website nutzen zu knnen, aktivieren Sie bitte JavaScript. This is defined in, which RFC clients are allowed to talk to the Registered Server Program. A rule defines. 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. In other words, the SAP instance would run an operating system level command. A general secinfo rule definition would be (note that the rule was split into multiple lines for explanation purposes, so it is more easily understood): 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 can tighten this authorization check by setting the optional parameter USER-HOST. TP is restricted to 64 non-Unicode characters for both secinfo and reginfo files. The order of the remaining entries is of no importance. Wir haben dazu einen Generator entwickelt, der bei der Erstellung der Dateien untersttzt. For example: an SAP SLD system registering the SLD_UC and SLD_NUC programs at an ABAP system. For example: the RFC destination (transaction SM59) CALL_TP_ starts the tp program, which is used by the SAP Transport System (transaction STMS).Before jumping to the ACLs themselves, here are a few general tips: A general reginfo rule definition would be (note that the rule was split into multiple lines for explanation purposes, so it is more easily understood): Usually, ACCESS is a list with at least all SAP servers from this SAP system. Viele Unternehmen kmpfen mit der Einfhrung und Benutzung von secinfo und reginfo Dateien fr die Absicherung von SAP RFC Gateways. It is important to mention that the Simulation Mode applies to the registration action only. As a result many SAP systems lack for example of proper defined ACLs to prevent malicious use of the RFC Gateway. The name of the registered program will be TAXSYS. Environment. 1408081 - Basic settings for reg_info and sec_info 1702229 - Precalculation: Specify Program ID in sec_info and reg_info. The parameter is gw/logging, see note 910919. As we learned in part 3 SAP introduced the following internal rule in the in the secinfo ACL: Sie knnen anschlieend die Registerkarten auf der CMC-Startseite sehen. 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. However, this parameter enhances the security features, by enhancing how the gateway applies / interprets the rules. Now 1 RFC has started failing for program not registered. A LINE with a HOST entry having multiple host names (e.g. Datenbankschicht: In der Datenbank, welche auf einem Datenbankserver liegt, werden alle Daten eines Unternehmens gesichert. 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