google-chrometls1.2http2nancyself-signed-certificate

Error "ERR_HTTP2_INADEQUATE_TRANSPORT_SECURITY" in Google Chrome while accessing locally hosted SPA

I've a locally hosted SPA (Kestral/.Net core). It is using a self signed certificate for HTTPS communication (generated through Server Certificates in windows 10).

It works well with IE11, however when accessed from Google Chrome, shows up error - ERR_HTTP2_INADEQUATE_TRANSPORT_SECURITY.

Any clues on what could be done to overcome this?

Troubleshooting done so far:

  1. Custom cipher suites order.
  2. Disabling HTTP2 through windows registry.
Solution

  • Adding if it helps anyone digging on same thing, for Kestral setting Protocol Version to http1 looks to be the way to overcome this issue, as Cipher suite doesn't looks to be configurable in kestral at least with .Net core 3.1.