.Net core 6 Post request, postman returns 404 on IIS

Question

I have a Post request like this:

    [HttpPost("storesubmission")]
    public async Task<IActionResult> StoreSubmission([FromBody]TestModel tModel)
    {
            mt.name = tModel.name;
            mt.age = tModel.age;
            mt.submittedBy = tModel.submittedBy;
            mt.submittedAt = tModel.submittedAt;
            mt.province = tModel.province;
            mt.tractId = tModel.tractId;  
            mt.referenceNumber = tModel.referenceNumber;
            _context.TestModels.Add(mt);

            await _context.SaveChangesAsync();

        return Ok(mt);
    }

When I test it on my local machine it works fine, but when I publish it on our IIS server the POST doesn't work. The strange thing is that I also have GET methods that work fine on local and Server, but none of my POST requests work. I have an API key for the request and here is my Program.cs:

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddDbContext<DataContext>(options =>
{
    options.UseSqlServer(builder.Configuration.GetConnectionString("ProntoConnection"));
});


var corsPolicy = "_corsPolicy";
builder.Services.AddCors(options =>
{
    options.AddPolicy(corsPolicy,
                      policy =>
                      {
                          policy
                               .WithOrigins("https://example.com")
                               .AllowAnyMethod()
                              .AllowAnyHeader()
                              .AllowCredentials();
                      });
});


var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseCors(corsPolicy);
app.UseAuthentication();
app.UseAuthorization();
app.UseHttpsRedirection();
app.UseMiddleware<ApiKeyMiddleware>();
app.MapControllers();
app.Run();

Here is my request in Postman

There are no errors. It seems like it doesn't even reach the endpoint, so it only gives The specified URL cannot be found.

Answer 1

This was a firewall issue. The company firewall was blocking the request.