Adapter for SAP can only access SAP systems for which an RFC connection alias has been created. There is no service available that allows you to execute RFC calls to SAP systems that are not defined there.

In addition to this restriction, you can also protect access to SAP systems in an intranet by installing an additional firewall between Integration Server and the SAP systems or putting Integration Server in the DMZ. You can configure the firewall to restrict which SAP systems can be accessed from Adapter for SAP through the SAP router.

Finally, you might even want to completely disallow Integration Server in the DMZ to actively open connections to a SAP system in the intranet. To do so, you need to install two Integration Servers: one in the DMZ, which is configured as an Enterprise Gateway Server, and one in the intranet. Integration Server in the intranet establishes the connection to Enterprise Gateway Server, whereas data still flows synchronously from the outside to the inside. For information about how to configure Integration Server as an Enterprise Gateway Server, see webMethods Integration Server Administrator’s Guide for your release.