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Web Dispatcher - Which Ports needs to be opened?

Hi experts,

we want to open an SSL Connection from WebDispatcher to ABAP-System.

As far as I know, I need to open the MSG-http port (80##) and the ICM-https Port for this in DMZ.

At least for a JAVA-System this is enough.

Now I did figure out, that for a ABAP-System also the ICM-http Port needs to be opened.

Is this correct, so that for a ABAP system I have to open also the http port if I want to make a trusted connection?

(if I don't open it, I get a "Server is not reachable").

Kind regards

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1 Answer

  • Best Answer
    Posted on Jan 12, 2016 at 03:39 PM


    If you want the Web Dispatcher to communicate with the backend system using HTTPS only, you need to set the following parameters at the Web Dispatcher profile:

    *** For when the Web Dispatcher is loading the required "meta data"

    wdisp/server_info_protocol = https

    wdisp/group_info_protocol = https

    wdisp/url_map_protocol = https

    wdisp/ping_protocol = https

    Metadata Exchange Using SSL - SAP Web Dispatcher - SAP Library

    *** For when the Web Dispatcher is forwarding end user requests

    wdisp/ssl_encrypt = 2

    (or maybe 1)

    Configuring SAP Web Dispatcher to Support SSL - SAP Web Dispatcher - SAP Library

    You also need an HTTPS port open at the Message Server and at the ICM of every ABAP instance, and open all these HTTPS ports at your DMZ (so the Web Dispatcher can reach them).

    However, if the Web Dispatcher should use HTTP co communicate with the backend, you only need to open the HTTP port (ICM) of every instance, besides the Message Server HTTP port, at your DMZ.

    Kind regards,


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