How do I access a URL that begins with https?
Browsers configured to use the proxy will give an error message such as "Proxy Server Refused Connection" or "Internet Explorer unable to open webpage" when you try to access a resource URL that starts with "https". If you encounter this error, please try accessing a different resource whose URL does NOT begin with "https" (such as the Oxford English Dictionary). You will be asked to log into the proxy. After you've logged in, please access the resource with the "https" URL again. Subsequent access to "https" resources within the same browser session should not trigger this error.
Alternative: use the Virtual Private Network (VPN).