With a DataHub instance running, right click on the DataHub system-tray icon and choose Properties.

In the Properties window, select Web Server .

Check the Act as web server box.

The DataHub Web Server is preconfigured to run on port number 80, but you might need to change that setting in the Base Configuration section:

	When using the DataHub Web Server to support WebSocket connections, we recommend using SSL.

	When using SSL, we recommend using port 443.

	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.

To get a list of which ports are in use on your machine, follow these steps:

1. From the Windows Start menu, choose Run.

2. Enter the executable name cmd.exe and click OK.

3. At the command prompt, type:

   netstat -p tcp -b -a -n

   

   The result is a table showing the tcp protocol and executable name of all programs in use. There are two columns of interest: Local Address and State. In Local Address, the numbers at the end (after the colon) are the port number that the process is using. The State column shows the state of that process. The only state we are interested in is LISTENING. Whatever port you are using for the DataHub Web Server, it should be the only process on that port.

If you have one or more programs established or listening on the same port as the DataHub instance, you have two choices:

Port numbers 1 through 1024 are reserved. Port 80, for example, is reserved for HTTP, which is why we make it the default for the DataHub Web Server. If you change the DataHub Web Server from port 80, we suggest setting it to a number between 1025 and 65535.

Configure any desired options, according to these guidelines: