ASP IIS 404 Page Setup

In the custom error for IIS, in the "HTTP Error message" box, locate 404, select Double-click, or select "Edit Properties" on the point to define your site's 404 page address.

Message type Select "url" to fill in the absolute path of the URL

You want to set response in an ASP page for error mapping. Status = "404 Not Found"

So SEO crawl page when the status will be 404, otherwise it will be 200 state

But oddly enough, you get a 200 status in the Webmaster status query before all of this work is done.

It also gave me a headache, and then discovered that the HTTP response Content Protection feature was set in server security software

After the corresponding set up, finally success can make the page add 404 status!

ASP IIS 404 Page Setup