Sites that support the SPDY protocol do not load on the first attempt in Internet Explorer 11 on Windows 8.1 if an HTTP proxy server is configured. When the site is first requested, IE returns a "This page can't be displayed" message, but will display the site correctly if the Refresh button is subsequently pressed, or if the user clicks the address bar and presses Enter to reload the page.
Common sites that use SPDY when it is supported in the browser include www.google.com, mail.google.com, drive.google.com, and other Google properties.
A video of the behaviour can be viewed here: http://www.youtube.com/watch?v=bSwy7dCfn9o
This is 100% reproducible on multiple Windows 8.1 workstations with the above named sites when traffic is passing via a Smoothwall proxy. There are also references online to the same problem when using:
- Websense (http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/Windows_8/Q_28272518.html)
- Microsoft TMG (http://windowsexplored.com/2013/10/28/ie-11-page-cant-be-displayed-google-com-spdy3-protocol/)
Current versions of Chrome and Firefox (both with SPDY support) do not exhibit this problem on the same workstation with the same proxy settings, so this appears to be an IE-specific problem rather than a general problem with SPDY via the proxy.