Windows Server 2019/IIS: problem with HTTPS

Alessandro Nasini 1

Good morning everyone,
I installed a Windows Server 2019 on a Proliant Microserver to use it as a web server.

Everything works fine except one thing: after configuring the HTTPS binding on a website on which HTTP works fine, a client (whatever browser you use) is seen requesting access with authentication (thai is not enabled). While providing it (which obviously is not due, I am talking about a public accessible website) there is no way to access. In the server logs I find the following error:

"Received TLS 1.2 connection request from a remote client application, but the server does not support any of the cipher suites supported by the client application. TLS connection request failed."

Consider that IIS Crypto test says the configuration is correct.

Over the years I have installed several hundred websites on IIS (up to WS 2016) but with Windows Server 2019 it is the first and it is evident that I am doing something wrong or something is missing...

Sam Wu-MSFT 7,036 Reputation points Microsoft Vendor

2021-05-06T09:47:57.06+00:00

@Alessandro Nasini Do you have enableTLS 1.2? if not, you could refer to this link. TLS 1.2.
Alessandro Nasini 1 Reputation point

2021-05-06T10:02:42.283+00:00

As I told, the server is a Windows Server 2019. Build 17763.1911
Sam Wu-MSFT 7,036 Reputation points Microsoft Vendor

2021-05-07T08:06:17.85+00:00

@Alessandro Nasini Please check if you enable TLS 1.2.
Alessandro Nasini 1 Reputation point

2021-05-07T08:58:16.557+00:00

Yes, TLS 1.2 is enabled.
Sam Wu-MSFT 7,036 Reputation points Microsoft Vendor

2021-05-11T08:32:34.61+00:00

@Alessandro Nasini You can try to run the Process Monitor tool to see what is trying to connect to it.