如何更改 Asp.Net 核心应用程序的端口号？

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Yes this will be accesible from other machines if you bind on any external IP address. For example binding to http://*:80 . Note that binding to http://localhost:80 will only bind on 127.0.0.1 interface and therefore will not be accesible from other machines.

Visual Studio is overriding your port. You can change VS port editing this file Properties\launchSettings.json or else set it by code:

        var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.UseUrls("http://localhost:80") // <-----
.Build();


host.Run();

A step by step guide using an external config file is available here.

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you can also code like this

        IConfiguration config  = new ConfigurationBuilder()
.AddCommandLine(args)
.Build();
var host = new WebHostBuilder()
.UseConfiguration(config)
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseStartup<Startup>()
.Build();

and set up your application by command line :dotnet run --server.urls http://*:5555

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In Asp.net core 2.0 WebApp, if you are using visual studio search LaunchSettings.json. I am adding my LaunchSettings.json, you can change port no as u can see.

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We can use this command to run our host project via Windows Powershell without IIS and visual studio on a separate port. Default of krestel web server is 5001

$env:ASPNETCORE_URLS="http://localhost:22742" ; dotnet run

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In visual studio 2017 we can change the port number from LaunchSetting.json

In Properties-> LaunchSettings.json.

Open LaunchSettings.json and change the Port Number.

Change the port Number in json file

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Go to your program.cs file add UseUrs method to set your url, make sure you don't use a reserved url or port

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


public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()


// params string[] urls
.UseUrls(urls: "http://localhost:10000")


.Build();
}

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Use following one line of code .UseUrls("http://*:80") in Program.cs

Thus changing .UseStartup<Startup>()

to

.UseStartup<Startup>() .UseUrls("http://*:80")

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All the other answer accounts only for http URLs. If the URL is https, then do as follows,

Open launchsettings.json under Properties of the API project.
Change the sslPort under iisSettings -> iisExpress

A sample launchsettings.json will look as follows

{
"iisSettings": {
"iisExpress": {
"applicationUrl": "http://localhost:12345",
"sslPort": 98765 <== Change_This
}
},

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It's working to me.

I use Asp.net core 2.2 (this way supported in asp.net core 2.1 and upper version).

add Kestrel section in appsettings.json file. like this:

{
"Kestrel": {
"EndPoints": {
"Http": {
"Url": "http://localhost:4300"
}
}
},
"Logging": {
"LogLevel": {
"Default": "Warning"
}
},
"AllowedHosts": "*"
}

and in Startup.cs:

public Startup(IConfiguration configuration, IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddEnvironmentVariables();


Configuration = builder.Build();
}

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in your hosting.json replace"Url": "http://localhost:80" by"Url": "http://*:80" and you will be able now access to your application by http://your_local_machine_ip:80 for example http://192.168.1.4:80

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Maybe it's because I am not using Core yet. My project didn't have a LaunchSettings.json file but that did prompt me to look in the project properties. I found it under the Web tab and simply changed the project url:

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If you want to run on a specific port 60535 while developing locally but want to run app on port 80 in stage/prod environment servers, this does it.

Add to environmentVariables section in launchSettings.json

"ASPNETCORE_DEVELOPER_OVERRIDES": "Developer-Overrides",

and then modify Program.cs to

public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseKestrel(options =>
{
var devOverride = Environment.GetEnvironmentVariable("ASPNETCORE_DEVELOPER_OVERRIDES");
if (!string.IsNullOrWhiteSpace(devOverride))
{
options.ListenLocalhost(60535);
}
else
{
options.ListenAnyIP(80);
}
})
.UseStartup<Startup>()
.UseNLog();
});

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in appsetting.json

{ "DebugMode": false, "Urls": "http://localhost:8082" }

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3 files have to changed appsettings.json (see the last section - kestrel ), launchsettings.json - applicationurl commented out, and a 2 lines change in Startup.cs

Add below code in appsettings.json file and port to any as you wish.

  },


"Kestrel": {


"Endpoints": {


"Http": {


"Url": "http://localhost:5003"


}


}


}


}

Modify Startup.cs with below lines.

using Microsoft.AspNetCore.Server.Kestrel.Core;

services.Configure<KestrelServerOptions>(Configuration.GetSection("Kestrel"));

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Use simply dotnet YouApp.dll --urls http://0.0.0.0:80.

P.S. I don't know why I need to google this everytime and everytime it doesn't show up. So here it is.

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will clients from other machine be able to access the service?

add to appsettings.json

  "Urls": "http://0.0.0.0:8082",

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I had a similar issue with a Kubernetes deployment after upgrading to .NET 6. The solution was simply to add the following environment variable to the deployment:

- name: Kestrel__Endpoints__Http__Url
value: http://0.0.0.0:80

This will work anywhere else where you can use an environment variable

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I created my project using Visual Studio 2022, so in Project/Properties/launchSettings.json there are two parts for this topic: 1- for lunching in IISExpress :

"iisSettings": {
..
"iisExpress": {
"applicationUrl": "http://localhost:31520",
"sslPort": 44346
}

},

2- for lunching through IDE:

"profiles": {
"MaxTemplate.API": {
...
"applicationUrl": "https://localhost:7141;http://localhost:5141",
...
}
},

For example you can change the port 7141 to 5050 and run the project again.

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In asp.net core 6
app.Run("https://*:25565");
or in my case for deploying on heroku
app.Run("https://*:"+Environment.GetEnvironmentVariable("PORT"));

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Core 6.0 --> Without any JSON setting changes we do some thing like this.. I also commented some code bcoz I don't have certificate. we can run it any port.

 builder.WebHost.ConfigureKestrel((context, serverOptions) =>
{
// serverOptions.Listen(System.Net.IPAddress.Loopback, 5003);
serverOptions.Listen(System.Net.IPAddress.Loopback, 8086, listenOptions =>
{
listenOptions.UseHttps();
//listenOptions.UseHttps("testCert.pfx", "testPassword");
});
});

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Building on @Abdus Salam Azad's answer...

In Visual Studio 2022 if you right click an ASP.NET Core Web API project for example, you have access to this UI where you can set up ASPNETCORE variables like this:

There you can enter a custom URL:port for ASPNETCORE_URLS like this:

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The following works in ASP.Net Core 6.0. Inside Program.cs have this:

var builder = WebApplication.CreateBuilder(args);


if (!app.Environment.IsDevelopment())
{
builder.WebHost.UseUrls("http://*:80", "https://*.443");
}

I find it is useful to wrap it in a conditional statement when publishing to production, but this isn't necessary.

This works running from a Kestrel server on Mac OS 12.

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Don't have enough rep to add this as a comment, but I want to add that the WebHost.UseUrls() in .net core 6 can be set using a combination of IPAddress and IPEndPoint in file Program.cs

if (!builder.Environment.IsDevelopment()) // app in release
{
// listen to any ip on port 80 for http
IPEndPoint ipEndPointHttp = new IPEndPoint(IPAddress.Any, 80),
           

// listen to any ip on port 443 for https
ipEndPointHttps = new IPEndPoint(IPAddress.Any, 443);


builder.WebHost.UseUrls($"http://{ipEndPointHttp}",
$"https://{ipEndPointHttps}");


// enforce ssl when in release
builder.Services.AddHsts(options =>
{
options.Preload = true;
options.IncludeSubDomains = true;
options.MaxAge = TimeSpan.FromDays(3); // a commonly used value is one year.
});


// redirect to specific https port
builder.Services.AddHttpsRedirection(options =>
{
options.RedirectStatusCode = (int)HttpStatusCode.PermanentRedirect;
options.HttpsPort = ipEndPointHttps.Port;
});
}
else // app in debug
{
// listen to localhost on port 8081 for http
IPEndPoint ipEndPointHttp = new IPEndPoint(IPAddress.Loopback, 8081),


// listen to localhost on port 5001 for https
ipEndPointHttps = new IPEndPoint(IPAddress.Loopback, 5001);


builder.WebHost.UseUrls($"http://{ipEndPointHttp}",
$"https://{ipEndPointHttps}");


// redirect to specific https port
builder.Services.AddHttpsRedirection(options =>
{
options.RedirectStatusCode = (int)HttpStatusCode.TemporaryRedirect;
options.HttpsPort = ipEndPointHttps.Port;
});
}


... // rest of configuration


app.UseHttpsRedirection(); // set redirection to https if url is in http


....

Also note that using these values new IPEndPoint(IPAddress.Any, 80), *:80, ::80 are all equivalent, but I prefer IPEndPoint since it is more verbose

If a custom ip address (ex: 192.168.1.200) is needed other than IPAddress.Any or IPAddress.Loopback, a new address can be set using IPAddress.Parse("192.168.1.200")