No webpage was found for the web address: http://127.0.0.1:50000/signin-steam

[aspnet-contrib]

No webpage was found for the web address: http://127.0.0.1:50000/signin-steam

[martincostello]

Have you also added the appropriate middlewares (and in the right order) like in the sample application?

AspNet.Security.OpenId.Providers/samples/Mvc.Client/Startup.cs

Lines 57 to 69 in f5dde16

	public void Configure(IApplicationBuilder app)
	{
	app.UseStaticFiles();
	app.UseRouting();
	app.UseAuthentication();
	app.UseAuthorization();
	app.UseEndpoints(endpoints =>
	{
	endpoints.MapDefaultControllerRoute();
	});

[kevinchalet]

Closing, as I believe your issue was caused by a missing middleware (typically, app.UseAuthentication()).

[kamilk91]

Hi, i have to re-open issue.

Now i have Kestrel Server, fully configured with your tips. Problem is (propably) that im using Nginx reverse proxy, and it begins again:

My configuration:
Startup:

readonly string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";


        private void CheckSameSite(HttpContext httpContext, CookieOptions options)
        {
            if (options.SameSite == SameSiteMode.None)
            {
                var userAgent = httpContext.Request.Headers["User-Agent"].ToString();

                options.SameSite = (SameSiteMode)(-1);

            }
        }

        public void ConfigureServices(IServiceCollection services)
        {

            //services.AddGrpc();
            services.AddAuthentication(options =>
            {
                options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
            })
            .AddCookie(options =>
            {
                options.LoginPath = "/login";
                options.LogoutPath = "/signout";
            })

            .AddOpenId("Orange", "Orange", options =>
            {
                options.Authority = new Uri("https://openid.orange.fr/");
                options.CallbackPath = "/signin-orange";
            })

            .AddOpenId("StackExchange", "StackExchange", options =>
            {
                options.Authority = new Uri("https://openid.stackexchange.com/");
                options.CallbackPath = "/signin-stackexchange";
            })

            .AddOpenId("Intuit", "Intuit", options =>
            {
                options.CallbackPath = "/signin-intuit";
                options.Configuration = new OpenIdAuthenticationConfiguration
                {
                    AuthenticationEndpoint = "https://openid.intuit.com/OpenId/Provider"
                };
            })

            .AddSteam();
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);
            services.AddLogging();

            services.AddCors(options =>
            {
                options.AddPolicy(MyAllowSpecificOrigins,
                builder =>
                {
                    builder.WithOrigins("*")
                    .AllowAnyHeader()
                    .AllowAnyOrigin()
                    .AllowAnyMethod();
                });
            });

            services.Configure<CookiePolicyOptions>(options =>
            {
                options.MinimumSameSitePolicy = (SameSiteMode)(-1);
                options.OnAppendCookie = cookieContext =>
                    CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
                options.OnDeleteCookie = cookieContext =>
                    CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
            });


        }
        public void Configure(IApplicationBuilder app, ILoggerFactory logger)
        {

            logger.CreateLogger("Logging");



            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapDefaultControllerRoute();

            });
            app.Use((context, next) =>
            {
                context.Response.Headers.Add("Access-control-allow-headers", "Content-Type, Accept, X-Requested-With, method");
                context.Response.Headers.Add("Access-control-allow-methods", "GET, POST, DELETE, PUT, OPTIONS, HEAD");
                context.Response.Headers.Add("Access-control-allow-origin", "*");
                context.Response.Headers.Add("Access-control-allow-credentials", "true");
                return next.Invoke();
            });
            app.UseCors(option => option.WithHeaders("accept", "content-type", "origin"));
            app.UseCookiePolicy();
            app.UseCors(MyAllowSpecificOrigins);
            app.UseHsts();
            app.UseHttpsRedirection();
        }


    }

Program.cs

var host = new WebHostBuilder()
                .UseKestrel()
                .UseUrls($"{env_config.KestrelURL}")
                .UseStartup<Startup>()
                .ConfigureLogging(l =>
               {
                   l.ClearProviders();
                   l.AddConsole();
               })
                .Build();

If user is Logged into steam redirection after taking SteamId works fine, but if user has to provide password, or confirm "Continue as xxxx" app redirecting him to 127.0.0.1:50000.

NGinx listening to 50000 on localhost, and proxing it to subdomain "secure.example.com".

[martincostello]

Have you configured nginx and/or Kestrel appropriately to forward on the host header and to be a trusted proxy for headers like x-forwarded-for and x-forwarded-proto?