Can't access WEB API with ip:port but can with localhost:port during VS debug mode

If you're running it in debug mode I assume you're using IIS-Express.

By default, IIS-Express only binds to localhost.

To circumvent this, you can open the IIS-Express application config file located at: C:\Users\<username>\My Documents\IISExpress\config\applicationhost.config and modify the site's binding information.

change

<binding protocol="http" bindingInformation="*:55284:localhost" />

to

<binding protocol="http" bindingInformation="*:55284:*" />

You'll also have to restart IIS-Express after the change.

I had the same problems when I wanted to share my localhost IIS so some guys could just type my machine name or IP and connect to my web app instance. So if this is what you need when http://johan.driessen.se/posts/Accessing-an-IIS-Express-site-from-a-remote-computer. It works for me for both Silverlight and MVC apps. I even set breakpoints and they are hit from a remote machine.

In your solution dir, in the file .vs\config\applicationHost.config change the line

 <binding protocol="http" bindingInformation="*:1234:localhost" />

to

<binding protocol="http" bindingInformation=":1234:192.168.1.35" />

and run Visual Studio as an admin. Restart IIS Express. this solution work for me.

I have been looking for this a while and finally found a solution for people who debug to console app (launch: project).

In the Program.cs class you have to add the UseUrls()

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder
                       .UseUrls("http://0.0.0.0:5000", "https://0.0.0.0:5001")
                       .UseStartup<Startup>();
                });

I couldnt find this anywhere online but I found it in some old project I had where it was working.

Had the same issue debugging in Visual Studio Code, I solved it by adding:

"env": {
      // ...
      "ASPNETCORE_URLS": "http://*:5000" // change to the port you are using
      // ...
},

.. to launch.json

Apparently, by default it binds http protocol to 'localhost:5000', so it works with localhost but not with ip address.

If you are trying to hit a breakpoint by a request coming from a different computer, don't forget to check your firewall settings (and/or antivirus)

hope this helps

.net core, you can access the api using ip or machine name

var builder = WebApplication.CreateBuilder(args);
builder.WebHost.UseUrls("http://0.0.0.0:5000", "https://0.0.0.0:5001");
var app = builder.build();
app.Run();