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    Simple Application Server:Connect to a simple application server by using the rescue feature

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    Simple Application Server:Connect to a simple application server by using the rescue feature

    Last Updated:Feb 28, 2026

    The rescue feature provides browser-based Virtual Network Computing (VNC) access to your Simple Application Server. Use it to diagnose and fix issues that prevent Workbench or third-party tools such as PuTTY, Xshell, or SecureCRT from connecting.

    LimitationDetail
    File transferNot supported over rescue connections
    Low-bandwidth networksLatency, stuttering, or image quality degradation may occur
    Session timeoutAbout 300 seconds of inactivity; the connection closes automatically

    For routine access, connect through Workbench or a third-party client. For more information, see Connect to a Linux server and Connect to a Windows server.

    When to use the rescue feature

    • Troubleshooting -- Connect through VNC when high vCPU utilization or SSH configuration changes block Workbench and third-party tool access.

    • GUI logon -- After building a GUI on a server running an operating system such as Ubuntu, connect through VNC to use the graphical desktop.

    Prerequisites

    Before you begin, ensure that you have:

    Start a rescue connection

    1. Go to the Servers page in the Simple Application Server console.

    2. In the server card, click Remote Connection.

      image

    3. In the Rescue Logon section of the Remote Connection dialog box, click Log on Now. The rescue connection page opens. If the page does not appear, check whether your browser blocked the pop-up.

      image

    4. Complete the logon for your operating system.

      Log on to a Linux server

      1. Enter a username, such as root, and press Enter.

      2. Enter the logon password and press Enter.

        Note

        Password characters are hidden during entry to prevent leakage. Verify that you enter the correct password.

        The following output indicates a successful logon.

        image

      3. (Optional) To paste long text, such as a file download URL, from your on-premises device to the server, click copy command in the upper-right corner of the rescue connection page and paste the text in the dialog box that appears.

      4. (Optional) Switch VNC terminals by pressing CTRL+ALT+F1 through CTRL+ALT+F10. Each terminal can run different programs. The default terminal is CTRL+ALT+F1. You can also switch terminals from the menu icon in the upper-left corner of the rescue connection page. For example, choose image.png > CTRL+ALT+F2.

        image

      Log on to a Windows server

      1. (Conditionally required) If the desktop is locked, choose image.png > CTRL+ALT+DELETE in the upper-left corner of the page.

        image.png

      2. On the Windows administrator logon page, enter the logon password and press Enter.

        win2012登录界面

    FAQ

    Why does the rescue connection page display a white screen after I stop performing operations?

    A rescue connection session lasts about 300 seconds by default. After the session times out, the page goes blank. Close the page and reconnect through the rescue feature.

    Why am I unable to connect to a server by using the rescue feature?

    The server may be unresponsive due to high vCPU utilization and high memory usage. Restart the server during off-peak hours and try again.

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