>      That's obviously true for applications running on a host which is
> remote to the user. And, of course, such applications can be reached
> through localhost. A good example is the Cups interface on port 631. I
> have some home-made applications also (~:

>      However there are simple things which cannot work like this, for
> example an application which remains sleeping and hidden and just pops
> up an interactive window when some event happens. Also one needs to
> reserve one port for every such web server and keep them in the
> browser's bookmark.

> --     Didier