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My employer (a public school system) has blocked everything but IE9 on port 80 to keep students from using proxies/tunneling/[other firewall avoidance method].

• AndrewDucker 15y ago
  I'm curious - do they check the user agent? Or something more complex?
  • xorglorb 15y ago
    It's possibly they just locked down the work stations to disallow anything but IE, then don't have WiFi for laptops.
  • chuinard 15y ago
    It could be a Windows domain policy. Active Directory is a really powerful management tool.
• Volpe 15y ago
  Chrome Frame?