Question

There is a HttpModule that change Server field in Response Headers. But it does not work in ASP.NET/IIS7 classic mode. what is the solution for remove or change Server field in reponse header?

public class CloakHttpHeaderModule : IHttpModule
{
    public void Init(HttpApplication app)
    {
        app.PreSendRequestHeaders += new EventHandler(context_PreSendRequestHeaders);
    }

    public void Dispose()
    {
    }

    private void context_PreSendRequestHeaders(object sender, EventArgs e)
    {
        var context = ((HttpApplication)sender).Context;
        context.Response.Headers.Set("Server", "Apache 2.0");
        //HttpContext.Current.Response.Headers.Set("Server", "WSGIServer/0.1 Python/2.6.1");
    }

}

Answer 1

You can’t do this unless you’re running at least IIS7, Integrated Pipeline Mode and .NET 3.0. The documentation states this:

HttpResponse.Headers Property

The Headers property is only supported with the IIS 7.0 integrated
pipeline mode and at least the .NET Framework 3.0. When you try to
access the Headers property and either of these two conditions is not
met, a PlatformNotSupportedException is thrown.