Session and Stateless requests processed using WSSP files produce markup language documents. Before these documents are sent to the client browser, their first lines are checked. If the first document line starts with the <REDIRECT> tag, the rest of the document first line is interpreted as a URL.
The Server returns the 301 ("Moved") response code with the Location header containing the specified URL.
The Server also processes the <RELREDIRECT> tag at the beginning of the document. It is processed in the same way as the <REDIRECT> tag, but the URL placed into the Location header is prefixed with the http or https prefix, the server name (and, optionally, port number) retrieved from the request URL.