Occasionally, when you try to embed a website, you will see the message, "refused to connect," or something similar. This means that the website administrator for the site you are trying to embed does not allow the site to be embedded. This is a setting that the website administor can easily change; however, some sites block embedding due to their security or privacy policies.

You can test if a site allows embedding here: https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_iframe.