19.9.Web Server

This option in the Properties Window sets up the DataHub to run as a lightweight http server capable of:

    Serving html documents.

    Serving Java applets to display live data.

    Serving many kinds of binary files.

    Password protected access.

    Server-side scripting to display DataHub data in a static web page.

Web Server

The web server can be turned on and off while the DataHub is running.

Ensure the Act as web server box is checked to enable the web server. Uncheck the box to disable it.

Base Configuration


The number of the port used to make TCP connections to the web server. The DataHub web server is preconfigured to run on port number 80, but you might need to change that setting.


Windows allows multiple users on a single TCP port, and never refuses a connection. However, this can cause irregular behavior. It is essential that the DataHub web server be the exclusive user of a port. Please refer to step 4 in Section8.2, “Configuring the Web Server” for more details.

Use secure sockets (SSL)

Checking this box will cause the web server to run in secure mode.

Allow directory listing

Checking this box allows users to browse the directory on your server.

Document root directory

The root directory for your documents.


Authentication realm

The name of the current authorization realm used for password verification. This will be displayed in the password prompt dialog.

Error log file:

The path and name of the file where errors are logged.

Access log file:

The path and name of the file where access attempts, successes, and failures are logged.

Global password file:

A file where global passwords are stored. You must have a filename entered here before creating passwords, and the file must exist. You can start out by creating an empty file. If there is a filename here and the file exists, the DataHub will require a user to enter their user name and password to access the site. To stop this behavior, you will need to remove the filename here, or change it to a non-existent file.

SSL certificate file:

The path and name of the certificate file used for secure sockets (SSL).

Edit Passwords

To create or edit a password, click the Manage Passwords button to open the Manage Passwords window:

Click the Add or Edit button to open the Passwords window:

User name

Enter the user name, with no spaces.

Auth. realm

Enter the name you entered for the Authentication realm in the Options emtry (see above).


Enter a new password with no spaces.

Repeat Password

Enter the password again, exactly as previously entered.