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How to block the multiple logons with NWBC?

Hello,

With Sapgui we have the possibility to prevent the multiple dialog logon by profile parameters (login/disable_multi_gui_login).

How to prevent the multiple dialog logon using NWBC to the same system?

Best regards

Frédéric Blaise

e-Kenz S.A.

Luxembourg

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2 Answers

  • author's profile photo Former Member
    Former Member
    Posted on Aug 01, 2011 at 05:55 PM

    Hi Frederic,

    Due to technical reasons this is not possible. The portal has no control over the user session. In fact the server does never know whether the user is still working, if a user closes the session directly.

    You may need to look at your own custom development mechanisms.

    Regards,

    Raghu

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  • author's profile photo Former Member
    Former Member
    Posted on Dec 11, 2013 at 10:05 AM
    -1

    Hello,

    Has SAP devised a way to disable multiple login via NWBC yet? I could only find this post with regards to this issue.

    Best Regards,

    Shilpa

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    • Former Member Frederic Blaise

      Hi Frederic,

      for Protocol reasons it is not feasible to check for a single login (which is your intended behaviour I guess). Reason here is, that for SAP-GUI we have a permanet TCP connection. The Protocol itself gives us a clear statement, there is a new login coming (someone launching the SAP-GUI to connect to the backend instead of for instance just opening a new mode).

      This features is not part of the HTTP protocol. There just opening a new window for an already existing session will lead to same execution flow as a direct acccess from a new window on the protocol layer. In fact even the IP can change in HTTP without the app loosing the connection (you may try it in bigger WLANs, moving from one section to an other if the IP changes the SAP-GUI wil break but the HTTP session will stay). So just checking the IP is not feasible either without breaking one of the main features of the HTTP protocol.

      If you could provide more info on the use case, there may be some other option to avoid the issue you are facing.

      regards,

      Patrick


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