Embed the NICE DCV web browser client inside an iFrame

By default, to protect against clickjacking attacks, NICE DCV doesn't allow the web browser client to be embedded inside an iFrame. However, you can override this default behavior to allow the web browser client to run inside an iFrame.

For more information, about preventing clickjacking attacks, see the Content Security Policy Cheat Sheet.

To allow the web browser to run inside an iFrame, you must configure the NICE DCV server to send the following additional HTTP response headers to the web browser client:

• web-x-frame-options

• web-extra-http-headers

We recommend that you add both headers to ensure the best compatibility across web browsers.

Note

If connecting through a NICE DCV Connection Gateway, the x-frame options need to be defined within the gateway configuration. This is done by using the local-resources-http-headers parameter within the [web-resources] section of the gateway configuration.

Windows server

1. Open the Windows Registry Editor and navigate to the HKEY_USERS/S-1-5-18/Software/GSettings/com/nicesoftware/dcv/connectivity/ key.

2. Open the web-x-frame-options parameter. For Value data, enter "ALLOW-FROM https://server_hostname".

   Note

   If the parameter doesn't exist, create a new String parameter and name it web-x-frame-options.

3. Open the web-extra-http-headers parameter. For Value data, enter [("Content-Security-Policy", "frame-ancestors https://server_hostname")].

   Note

   If the parameter doesn't exist, create a new String parameter and name it web-extra-http-headers.

4. Close the Windows Registry Editor.

5. Stop and restart the NICE DCV server.

Linux server

1. Open /etc/dcv/dcv.conf with your preferred text editor.

2. In the [connectivity] section, do the following:

   • For web-x-frame-options, enter "ALLOW-FROM https://server_hostname".

   • For web-extra-http-headers, enter [("Content-Security-Policy", "frame-ancestors https://server_hostname")].

   For example:

   [connectivity]
   web-x-frame-options="ALLOW-FROM https://my-dcv-server.com"
   web-extra-http-headers=[("Content-Security-Policy", "frame-ancestors https://my-dcv-server.com")]

3. Save and close the file.

4. Stop and restart the NICE DCV server.

By default, most browsers prevent access to some features, such as microphone access and fullscreen access. To allow access to these features, modify the iFrame element on the webpage. For example, to allow access to the microphone and to fullscreen mode, modify the iFrame element as follows:

<iframe src="..." allow="microphone; fullscreen">/iframe>