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  1. Qt
  2. QTBUG-70927

QTcpSocket could not connect to server via system proxy

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    Details

    • Platform/s:
      Windows

      Description

      QTcpSocket cannot connect to server via system proxy. Please find attached example project for this issue. 

      From customer: 

      To reproduce my issue, you only need one Windows machine.
      1. Setup proxy server on it
      2. Run the server application
      3. Change server ip in MainWindow::connectTcp().
      4. Make sure argument of QNetworkProxyFactory::setUseSystemConfiguration is
      true in client's main()
      5. Run client, and no debug output
      6. Change argument of QNetworkProxyFactory::setUseSystemConfiguration to
      false
      7. Run client, you will see the debug output "Hello client".

       

      From support: 

      I tried this case with one windows machine, both client and server running on same computer, but also with a setup where server is running on Mac, client is running on windows 10 and 3rd computer as a proxy in between. 

       

      When using proxy, i was able to connect to Mac from client comp via browser (10.9.21.xx:9967) and browser prints Hello Client. I was able to make ssh connection from win10 to mac using proxy. But when I run the client example project, using QNetworkProxyFactory::setUseSystemConfiguration(false); works like a charm, but QNetworkProxyFactory::setUseSystemConfiguration(true); does not make the connection

       

      Attached the example project which contains client and server, also a gif file from customer to show the setup

        Attachments

        1. proxy_issue.gif
          proxy_issue.gif
          946 kB
        2. tcpsocket.zip
          13 kB
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            • Assignee:
              tpochep Timur Pocheptsov
              Reporter:
              pekarjal Pekka Karjalainen
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              Dates

              • Created:
                Updated:
                Resolved:

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