Some websites do not load completely when using the SPDY protocol with HTTPS through the ProxySG appliance


Article ID: 168714


Updated On:


ProxySG Software - SGOS


The following information is for SGOS 6.6.x and SGOS 6.5.x versions earlier than

The following websites use SPDY protocol with HTTPS and do not load completely:
  • Wikipedia
  • VirusTotal
  • Work Rules!


The ProxySG appliance cannot load webpages that use SPDY protocol with SSL interception.


If this issue occurs in SGOS 6.5.x, upgrade to version or later. This is a known issue in 6.6.x.


Disable SPDY protocol in your browser to allow the ProxySG appliance to load the webpage.

For Chrome, in the address bar, enter:
"...\chrome.exe" --use-spdy=off --use-system-ssl 

For Firefox:
  1. In the address bar, enter: about:config
  2. In the list of commands, find network.http.spdy.enabled
  3. Set network.http.spdy.enabled  to false
For Internet Explorer:
  1. Select Tools > Internet Options > Advanced.
  2. Under HTTP settings, clear the Use SPDY/3 check box.

For explicit ProxySG deployments, disable SSL Protocol Detection in policy:
     <proxy> detect_protocol(none) detect_protocol(none)