Failed to authenticate HTTPS connection

### Type of issue

Code does not work (https://learn.microsoft.com/en-us/dotnet/core/additional-tools/self-signed-certificates-guide#with-openssl)

### Description

```

{"@timestamp":"2026-09-07T14:27:11.4263787+08:00","log.level":"Debug","message":"Failed to authenticate HTTPS connection.","ecs.version":"9.0.0","log":{"logger":"Microsoft.AspNetCore.Server.Kestrel.Https.Internal.HttpsConnectionMiddleware"},"labels":{"MessageTemplate":"Failed to authenticate HTTPS connection.","ConnectionId":"0HNOCL46D0GN7"},"agent":{"type":"Elastic.CommonSchema.Serilog","version":"9.0.0+608d9254e808806db6cd119e9af00ab7ae9402c2"},"error":{"message":"Received an unexpected EOF or 0 bytes from the transport stream.","stack_trace":"System.IO.IOException: Received an unexpected EOF or 0 bytes from the transport stream.\n at System.Net.Security.SslStream.ReceiveHandshakeFrameAsync[TIOAdapter](CancellationToken cancellationToken)\n at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)\n at Microsoft.AspNetCore.Server.Kestrel.Https.Internal.HttpsConnectionMiddleware.OnConnectionAsync(ConnectionContext context)","type":"System.IO.IOException"},"event":{"action":"AuthenticationFailed","code":"1","created":"2026-09-07T14:27:11.4263787+08:00","severity":1,"timezone":"Singapore Standard Time"},"host":{"os":{"full":"Ubuntu 26.04.1 LTS","platform":"Unix","version":"7.0.0.31"},"architecture":"X64","hostname":"khteh-p17-2i"},"process":{"name":"dotnet","pid":741778,"thread.id":13,"thread.name":".NET TP Worker","title":""},"service":{"name":"Web.Api","type":"dotnet","version":"1.0.0+0ed27246b6c6429d8a0927d4098a519556e385e7"},"user":{"domain":"khteh-p17-2i","name":"khteh"},"metadata":{"ExceptionDetail":{"Type":"System.IO.IOException","HResult":-2146232800,"Message":"Received an unexpected EOF or 0 bytes from the transport stream.","Source":"System.Net.Security","TargetSite":"Void MoveNext()"},"MemoryUsage":195117056}}
```

### Page URL

https://learn.microsoft.com/en-us/dotnet/core/additional-tools/self-signed-certificates-guide

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/additional-tools/self-signed-certificates-guide.md

### Document Version Independent Id

19debb34-1672-c5bc-395b-2ec523c25b8f

### Platform Id

19f0575d-c352-274f-8884-7bb465911a92

### Article author

@angee

### Metadata

* ID: 129ac9c9-bab2-7ae0-75f8-cf3b7ad16a56
* PlatformId: 19f0575d-c352-274f-8884-7bb465911a92
* Service: **dotnet-fundamentals**

[Related Issues](https://github.com/dotnet/docs/issues?q=is%3Aissue+is%3Aopen+19debb34-1672-c5bc-395b-2ec523c25b8f)

Start with docs/core/additional-tools/self-signed-certificates-guide.md and follow the self-signed certificate steps from the linked page on the reported Ubuntu environment. Reproduce the HTTPS authentication failure, then verify the guide's instructions work or clearly explain the required correction.

Written by the indexing model from the issue text.