> ### Changing Web server settings

> When you perform the initial Fathom configuration, you identify the Web server port you plan to use. Although you cannot choose to use the HTTPS protocol when you are making your initial configuration decisions regarding the Web server (as described in Chapter 5, "Setting Up Fathom for the First Time"), you can make that choice afterwards by updating the configuration options. You can change the port number, and you can also decide whether to use HTTP only, HTTPS (SSL) only, or both HTTP and HTTPS (SSL). If you choose to use both the HTTP and HTTPS protocols, you can define for both protocols a list of trusted clients.

> For example, you might prefer to restrict the ones you want to talk to Fathom without SSL. For HTTP, you might put the local host (or create a subnet of local users to use HTTP) as the trusted client. For HTTPS, you can open data transfer to anyone, keeping in mind that it might add some overhead to communications.

> Note: To use the existing command-line interface, HTTP must be enabled with localhost defined as a trusted client.

> To change the Web server settings:

> 1. Select Options Configuration Web server. The Fathom Web Server Configuration page appears in the detail frame and displays the current Web server settings.
> 2. Choose from the following protocol options:
> - If you want to allow HTTP connections, select the Enable HTTP protocol option. Type the port number in the HTTP port field.
> - If you want to allow HTTPS connections, select the Enable HTTPS protocol option. Type the port number in the HTTPS port field.
> - If you want to allow both HTTP and HTTPS connections, select both the Enable HTTP protocol option and the Enable HTTPS (SSL) protocol option. Then type the port numbers in the HTTP port field and the HTTPS port field.
> 3. Choose one:
> - If you want to work with the demo keystore, click Submit. Then see the "Using SSL with Fathom Management" section for details about using an HTTPS connection.
> - If you are an advanced user and you want to change keystore information, continue with the "Using advanced HTTP and HTTPS options with the Fathom Management Web server" section.

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