Asp Net Core Linux Err_Connection_Refused

ASP Net Core Linux ERR_CONNECTION_REFUSED

The response from the server explains the cause. The GET request to http://127.0.0.1:5000 is redirected to https://123.123.123.123:5001/api/values, it's because the HTTPS redirection is active.

Solution: Open the Startup.cs file. Find the following line in the public void Configure(...) method and comment it out:

app.UseHttpsRedirection();

Here you can read more about it.

ASP.NET Core 2.2 ERR_CONNECTION_REFUSED for http

To fix this scenario, ensure that the Program class configures the WebHost correctly.

In the example below, two URL strings .UseUrls("https://*:5001;http://*:5000")
are provided to configure the WebHost, ensuring the service accepts both https and http on the tcp ports 5001 and 5000.

e.g.

public class Program
{
    public static void Main(string[] args)
    {
        CreateWebHostBuilder(args).Build().Run();
    }

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseUrls("https://*:5001;http://*:5000")  
            .UseStartup<Startup>();
}

Plesk Linux ASP.NET Core ERR_CONNECTION_REFUSED

In the Startup.cs i deleted app.UseHttpsRedirection(); and now it works fine

111: Connection refused while connecting to upstream

Okay, so I have noticed that EB creates and attaches a security group, and it listens on port 80, not 5000. I am leaving this here as it might be helpful for someone else (aka my future self).

Accessing .net Core API via azure VM throws ERR_CONNECTION_REFUSED

By default, your local development server won't listen on your public IP or allow traffic from any other machine in your network. It only listens on localhost. You need to explicitly bind other urls to your server.

https://weblog.west-wind.com/posts/2016/sep/28/external-network-access-to-kestrel-and-iis-express-in-aspnet-core

You can run your code like this:

dotnet run --urls http://0.0.0.0:5001

Or you can use Use WebHost.UseUrls() to achieve a similar result.

Getting connection refused error on authentication ASP.NET Core 5

Maybe your cors policy was not created the right way.

Use:-

services.AddCors(options =>
            options.AddPolicy("AllowAngularDevClient", builder => builder
                .WithOrigins("http://localhost:4200")
                .AllowAnyHeader()
                .AllowAnyMethod())
        );

instead of:-

services.AddCors(options =>
            {
                options.AddPolicy("AllowAngularDevClient",
                  builder =>
                  {
                      builder
                      .WithOrigins("http://localhost:4200")
                      .AllowAnyHeader()
                      .AllowAnyMethod();
                  });
            });

Or you can normally use:-

 services.AddCors();

then your configure service:-

app.UseCors(x => x.AllowAnyHeader().AllowAnyMethod().WithOrigins("https://localhost:4200"));

hope it will resolve your issue.

ERR_CONNECTION_REFUSED - .Net Core 1.0.1

I figured it out that this happens when we are missing the following under the dependencies in project.json

"Microsoft.NETCore.App": {
      "version": "1.0.1",
      "type": "platform"
    }

NOTE If the version is wrong (in the above mentioned) then also we see the same error.

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