Asp.Net Core Web API app: how to change listening address?

Question

I write simple Asp.Net Core WebAPI 2.0 application, it works on my local machine. But i want to deploy it to server. So, i do it.

My system:

Ubuntu 1         


        

Answer 1

Try the below, it worked for me.

set ASPNETCORE_SERVER.URLS=http://0.0.0.0:5000/

Answer 2

I'm using .NETCore 2.1 prev, so I haven't been able to test it myself but if I believe that https://www.billbogaiv.com/posts/setting-aspnet-host-address-in-net-core-2, adding .UseUrls(urls: "http://*:5000") might be instructing Kestrel to listen to port 5000 and not only on localhost, so it should work also on a remote server.

Other possible solution, UseKestrel(..) https://docs.microsoft.com/en-us/aspnet/core/fundamentals/servers/kestrel?view=aspnetcore-2.1&tabs=aspnetcore2x using IPAddress.Any instead of Loopback.

Answer 3

This is configured by Server urls host configuration

Indicates the IP addresses or host addresses with ports and protocols that the server should listen on for requests.
Key: urls
Type: string
Default: http://localhost:5000
Set using: UseUrls
Environment variable: ASPNETCORE_URLS

Set to a semicolon-separated (;) list of URL prefixes to which the server should respond.

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It is also possible to set URL using command line arguments. For example:

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

but this doesn't work out of the box for old versions of ASP.NET Core (depends on whether this fix applied to used version or not).

A workaround for old versions based on fact that you always can set host settings directly via .UseConfiguration method:

var config = new ConfigurationBuilder().AddCommandLine(args).Build();

return WebHost.CreateDefaultBuilder(args)
        .UseConfiguration(config)

Note, the same idea may be used to read setting value from any other configuration source, like configuration file for example.