After trying to setup my site for Google Webmaster Tools I found that my Custom ASP.NET 404 page was not returning the 404 status code. It displayed the correct custom page and told the browser that everything is OK. This is consider a soft 404 or false 404. Google doesn’t like this. So I found many articles on the issue but the solution I want didn’t seem to work.
I have created an asp.net webpage and have uploaded it onto a webserver. However when I try to view the page remotely, I get errors about the customerror tag in the web.config file. The page works locally with no errors or warnings. Also if I upload the page as a .html file, I can view it fine remotely.
I have seen a lot of other people with this error, but the ‘solutions’ just say to change the customErrors tag to ‘Off’, which I have done and does not work, do you know is there an issue with the webserver or what could be the problem here?
I have a C# web forms ASP.NET 4.0 web application that uses Routing for URLs for some reason custom errors defined in the system.web section of my web.config is entirely ignored and it will fall back the IIS errors.
I set up 404 handler page in web.config, but it works ONLY when extension of URL is .aspx (or other which is handled by ASP.NET).
I know I can setup static HTML page in website options, but I want to have a page.
Is there any options to assign ASPX handler page for all request extensions in IIS?
As is suggested elsewhere, I am using redirectMode = ResponseRewrite in my custom error configuration so my custom error page can access the exception info. This has worked like a charm for some time.