Well, you can't use a non-routable protocol on the router or it wouldn't be
able to route it.

Internet
| Your LAN
DSL Router - Wired Router <
| (wired) WAP (Private)
Cafe Router
|
WAP (Public)

This setup will allow you complete separation between your private network
and the cafe Wireless. You can't have it both ways - cafe customers can
either access the network attached to the WAP or they can't - if you and
they can both connect, you are connected to each other. SOHO routers will
isolate because of the NAT (Network Address Translation) not provide
"outside-in" connections to be made. You'll need to secure your private WAP
so that cafe clients cannot connect. I'd actually suggest not having a WAP
on the private LAN, but plug your laptop in for local LAN access, and use
the cafe wireless just for Internet (being sure you have client for
microsoft networks and file and print sharing diabled on the wireless).

....kurt


"Laurence Baker" <luccombelad-newsgroups@yahoo.co.uk> wrote in message
news:due28j$q9l$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
> Someone asked a question previously on a newsgroup which roughly went like
> this.
>
> I have a Cafe and I want to provide broadband access for my customers via
> my wireless ADSL router. I also have a normal ethernet router through
> which I run 3 computers.
>
> I want to stop people accessing my network but still be able to use the
> Internet via my wireless access point. Also, I need my 3 computers to be
> able to access the Internet.
>
> The solution by general consenus was to use a non-routable protocol on the
> wired router, and connect the wired router to the wireless ADSL router
> thereby automatically creating two subnets.
>
> I'm a newbie to networking, but it through up a question that's been
> bugging me for days. How do his 3 computers access the Internet if they
> are using a non-routable protocol?
>
> Laurence
>
>