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We are running into some issues that seem to be affected by http2 and I want to turn it off temporarily to troubleshoot. I tried the registry keys outlined in this question but that did not help with Windows Server 2016.

How to disable HTTP/2 on IIS of Windows 10

Shaun Bowe
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    Possible duplicate of [How to disable HTTP/2 on IIS of Windows 10](https://stackoverflow.com/questions/31668151/how-to-disable-http-2-on-iis-of-windows-10) – William Gross Nov 25 '17 at 14:23
  • See also [How to disable HTTP 1.1](https://stackoverflow.com/q/70265394/12597) – Ian Boyd May 03 '22 at 13:57

2 Answers2

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  1. Start → regedit

  2. Navigate to the folder/path: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters

  3. Under the Parameters folder, right-click the white-space, add 2 new DWORD (32-bit) values:

    • EnableHttp2Tls
    • EnableHttp2Cleartext

  4. Ensure both new values have been set to 0(disabled) by right-clicking the value and clicking "Modify..."

  5. Restart the OS.

Michael
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Zanas Tumasonis
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  • What was the issue you faced? I was facing some very strange bugs related to Authorization headers. – statictype Aug 16 '18 at 07:37
  • The solution above works for SSRS web server as well as IIS. Chrome was unable to display reporting services reports over ssl until http2 was disabled. – user101654 Jun 14 '19 at 02:24
  • What if I want to enable it for testing. Am I adding these DWORDs with values of 1? – Mark Mar 22 '21 at 13:23
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Another solution, if you are only testing, is run Chrome without http2 enabled. from start run, chrome --disable-http2

Also, apparently a fix is coming, we just have to be patient for the rollout. See THIS article

Post Impatica
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