Graphic Hub Administrator Guide

Version 3.8 | Published February 06, 2023 ©

Web Server Configuration Settings

This window is used to customize certain settings for the Graphic Hub REST service web server. Any changes made are highlighted by the parameter name changing color. Click Apply to apply any changes, or Back to go back to the main configuration page.


  • Port: The port of the web server. The default value is 19398.

    Note: Changing the port to 1 or 65535 causes the web user interface to cease functioning in Chrome, UC Broswer, Opera and Firefox, as these browsers block requests on these ports.

  • Configuration directory: The directory where the web server configuration files are located.

  • Upload directory: Sets the directory where uploaded files are temporarily stored.

  • Document root: The web server document root directory, where the html files reside.

  • Error log: Set the location of the error log files for the web server.

  • Default index: Set the default index file name for directory requests. The default value is index.*.

  • Local endpoint: The local endpoint defines which IP address(es) the web server listens to. The default value is, which means that it listens on all installed adapters.

  • Log directory: The directory for Viz GH REST and web server log files.

  • Thread pool size: Set the maximum simultaneous connections (threads) the web server can process.

  • Use keep-alive: Enable or disable keep-alive header handling on the web server. This is enabled by default.

  • Use SSL https connection: Enable or disable SSL handling of incoming requests. This is disabled by default. See also SSL in REST.

    Note: When activating SSL, the user is automatically redirected to the new site. When disabling SSL, automatic redirects are not possible due to requirements in the HTTPS protocol.

  • Socket timeout (ms): When handling keep-alive requests, this timeout closes the socket after the defined number of milliseconds. A value of 0 disables timeout, and leaves the socket open forever. The default value is 15000.

    Note: Any changes to the web server configuration do not take effect until the Graphic Hub REST service has been restarted.