Show TOC

Background documentationProfile Parameters for Reverse Invoke Locate this document in the navigation structure

 

The following parameters are used for a reverse invoke configuration:

  • rdisp/mshost and ms/http_port: Must be displayed on the RI service by the message server.

    More information: Parameterization of the SAP Web Dispatcher

  • wdisp/max_servers (integer, default 128): This parameter specifies the maximum number of ACL entries (see below.)

  • wdisp/reverse_invoke (TRUE/FALSE; default FALSE): activates or deactivates reverse invoke. FALSE this causes the Web Dispatcher to open connections as before to the ICM and to the message server. TRUE causes the connection to be opened by the ICM or the message server. This means no TCP/IP connections can be opened by the Web Dispatcher.

  • wdisp/ri/use_ssl (TRUE/FALSE; default FALSE): This parameter must be set to TRUE if you want to use SLL to open the RI connection and therefore it specifies a host name for the individual servers in the ACL.

  • wdisp/ri/client_serv (service name or port number): The port number to which you want to connect the message server and ICM.

  • wdisp/ri/client_host (host name / IP address): If the listener for the connections between the ICM and the message server is to listen on a specific interface (IP address). This parameter corresponds to the HOST option of the ICM/Web Dispatcher parameter icm/server_port_<xx>.

  • wdisp/ri/pool_size (integer; default 5): The number of connections that are held in a pool to speed up the process of opening the connection.

  • wdisp/ri/acl_<xx> (character string): These access control entries are used to explicitly name the host on which the message server and ICMs are running. Only these are allowed to open connections to the Web Dispatcher. As with the SAProuter, the entries are P (permit) and D (deny). The letter is followed by an IP address or a host name. IP address masks can also be specified (see IP Address Formats).

    Example Example

    Entry

    Meaning

    wdisp/ri/acl_0 = P ldp007

    Connections from host ldp007 permitted.

    wdisp/ri/acl_1 = D 10.17.68.0/24

    Connections from hosts with IP addresses between 10.17.68.0 and 10.17.68.255 forbidden.

    wdisp/ri/acl_2 = P 10.23.8.11

    Connections from host 10.23.8.11 permitted.
    End of the example.

Caution Caution

Note that the number of entries is restricted by wdisp/max_servers.

End of the caution.
Check RI Connection

You can use program netstat to check whether the connections really are open from the ICM or the message server to the Web dispatcher. (In the example above with the Web dispatcher, netstat -an | grep 7010).

More Information

RI Configuration of a System with Web Dispatcher: Example

RI Configuration of SAProuter: Example

Generic profile parameters with the ending _<xx>