How to redirect special query to internal server ?

[P.A.]

Kevin Darcy <kcd at daimlerchrysler.com> wrote in message news:<c8dqn3$2dfc$1 at sf1.isc.org>...
> P.A. wrote:
> 
> >What I would like is to route all: w3.*.* querys to an internal HTTP
> >server used to develop clients web sites.
> >
> No, DNS wildcards don't work "up" the hierarchy, i.e. to the right-hand 
> side of a normally-represented DNS name. They only work "down" the 
> hierarchy, i.e. leftwards, and even then, are subject to various 
> restrictions and quirks.
> 
>                                                                          
>                                     - Kevin

  Should it be posible a solution using a proxy on the local machine ?
 Any idea of a ready-made app ?

  Thanks