Example: Listen 443
Since: Apache 1.1
This directive instructs the server to listen to more than one
TCP/IP address or port; by default, it responds to requests on
all IP interfaces, but only on the port given by the Port
directive. The Listen directive can be used instead of
BindAddress and Port. It tells the server to accept
incoming requests on the specified port or address-and-port
combination. If the first format (port number only) is used,
the server listens to the given port on all interfaces, instead
of the port given by the Port directive.
If an IP address is given as well as a port, the server will
listen on the given port and interface. Note that a Port
directive may also be required so that Apache-generated URLs that
point to your server will continue to work. Multiple Listen
directives may be used to specify a number of addresses and
ports to which to listen. The server will respond to requests
from any of the listed addresses and ports.