Example: UseCanonicalName off
Since: Apache 1.3
In many situations, the server must construct a self-referential
URL - that is, a URL that refers back to the same server. With
type set to ``on'', the server will use the ServerName
and Port directives to construct a canonical name. This
name is then used in all self-referential URLs, as well as for
the values of SERVER_NAME and SERVER_PORT in the SSI/==CGI
environment.
With type set to ``off'', the server will form
self-referential URLs using the host name and port supplied by
the client in the HTTP Host header field, if any is supplied
(otherwise, it will use the canonical name). These values are
the same as those used to implement name-based virtual hosts,
and they are available with the same clients. The SSI/CGI variables
SERVER_NAME and SERVER_PORT will be constructed from the
client-supplied values as well.
There is a third option in setting type: ``dns'', which is
intended for use with mass IP-based virtual hosting to support
ancient clients that do not provide an HTTP Host header field.
With this option, the server performs a reverse DNS lookup on the
server IP address to which the client connected to work
out self-referential URLs.