[farm gate]

1. For existing web content due to the path change and lead to access, can be in IIS defined in the 404 error point to a dynamic page, the page it USES 301 permanent redirection jump to a new address, the server returns 301 status code.
2, set up 404 point to a design good HTML file, the page back 404 status code. Now the idc provider basic provide 404 setting function, direct upload files can be set up. In IIs in setting methods: open IIs manager - > click to set up the custom 404 website attributes - > click custom error options - > selected 404 - > select and open the edit properties - > Settings - > URL into URL fill in "/ err404. HTML" -- > according to determine the exit again good err404. HTML page to web site under the root directory. Here in the "type of message" must choose "file" or "default", and don't choose "URL", otherwise, it will lead to a return to "200" status code.
3, 404 point to a dynamic pages, such as error. Asp, if Not inside page set up, only to return to prompt HTML code, and will lead to page back 200 Status code, this is Not correct, we can finish the show after prompt content, increase statement: Response. Status = "404 Not Found", this helps to ensure that the page back to 404 Status code.