How to Fix Error ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY on Chrome Browser

Overview

The following error occurs when accessing https using Google Chrome:

ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY

chromeerr

Environment

  • IIS 8.0 & above, Windows Server 2016

Resolution

  1. Open the registry editor.
  2. ON the server, navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters
  3. Create the following entries:

EnableHttp2Tls REG_DWORD 0

EnableHttp2Cleartext REG_DWORD 0

fixchromeissue

  1. Reboot the server.
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