No, with Let&#x27;s Encrypt you would have to have full control over contents of login.wifiprovider.com to get a certificate for that domain. Specifically, you&#x27;d have to be able to serve a token at<p><pre><code>    http:&#x2F;&#x2F;login.wifiprovider.com&#x2F;.well-known&#x2F;acme-challenge&#x2F;random
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Verifying ownership of wifiprovider.com that way would not automatically allow you to get certificates for subdomains too.