I think a DMZ is quite different to what this person wants. (Dlink DSL50x
and Dynalink 220/300 both definately support DMZ's, many other Routers also
do)

With a DMZ the Router still has a real world IP address, and an Internal IP
address. All requests inbound from the real world are pushed towards a
certain host on the internal network. This internal host is still, as far as
it is aware on a private IP address. If you configure this internal host to
be on the same public IP address as your ISP assigns you, things will break
and jebus will not be happy.

Time for some text diagrams...

What a DMZ achieves:

ISP
 |
210.x.x.x
 |
DSL Router
 |
10.0.0.1
 |
DMZ
 |
10.0.0.2
 |
Internal Host

As you can see from the above, the Internal host still believes it is on
10.0.0.2.

What Campbell requires ( I think ) is :

ISP
 |
(stuff which exists but is not really visible to people on the Interweb, ie.
Transparent)
 |
DSL Router
 |
end of (stuff which exists but is not really visible to people on the
Interweb, ie. Transparent)
 |
210.x.x.x
 |
Internal Host

Basically this second diagram does some cool kinda transparent bridging. For
non DSL connections, firewalls like a Netscreen 5XP support this
wonderfully. As far as I am aware, New Zealand and PPPoA (RFC 2364) does NOT
support this, and it should not work. However, I would love for someone to
prove me wrong. Other ADSL protocols, like PPPoE (and some other
implementations of PPPoA?) do have support for transparent bridging.

All of the above should not be treated as fact, and it would be nice for
someone to come and correct me if I am wrong :)

Dave

-----Original Message-----
From: owner-adsl@unixathome.org [mailto:owner-adsl@unixathome.org]On
Behalf Of Nathan Legg
Sent: Wednesday, 4 June 2003 12:49 a.m.
To: campbell steven; adsl@lists.unixathome.org
Subject: Re: ADSL Modems

I believe that any router supporting DMZ Host, would enable you to do that.
With DMZ host, you still get net connectivity via the router from other
computers.

----- Original Message -----
From: "campbell steven" <csteven@world-net.co.nz>
To: <adsl@lists.unixathome.org>
Sent: Tuesday, June 03, 2003 10:42 PM
Subject: ADSL Modems

> Hi,
>
> Does anyone know of a linux compatible, external, non-USB ADSL modem
> that's on the market today and that allows the real ip to be on the
> machine which handles the connection, rather than on the modem?
>
> Historically the 3com Dual Link has allowed this with the use of PPPoE
> and the Alcatel Speedtouch Home/Pro via PPTP of which i've used both,
> but neither are sold new any more in NZ to my knowledge.
>
> Can the Cisco 827 or 837 do this? (altho this would be an incredible
> waste of hardware i know)
>
> Thanks
>
> Campbell
> --
> campbell steven <csteven@world-net.co.nz>
>
> --
> This message is part of the NZ ADSL mailing list.
> see http://unixathome.org/adsl/ for archives, FAQ,
> and various documents.
> To unsubscribe: send mail to majordomo@lists.unixathome.org
> with "unsubscribe adsl" in the body of the message
>
>

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and various documents. 
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with "unsubscribe adsl" in the body of the message