[pptp-server] routing realworld ip addresses via pptp

[tmk]

can you be more specific about what you want to do? the ascii is either
wrong or it didnt come through right.

here's what i think you're trying to say:
you have a block of real ip's (btw, x.x.x.x/240 isnt standard notation
usually when you do /## it is the #of bits in the subnet mask. so
255.255.255.240 would be x.x.x.x/28) and a block of fake ip's. Both blocks
are routed through a linux router to the internet via an adsl connection.
Somewhere else on the internet is a different linux router/firewal, which is
the gateway to your work LAN. You want to connect the ADSL guys' network and
the fake ip guys network (which seem to share the same LAN, or at least the
same router) to the work network via a secure channel, keeping the current
IP addresses as the way of talking back and forth between the 3 networks.

Regardless of how you connect the 3 networks, there will be a tunnel created
between the linux boxes. Each side has its own ip address (which doesnt need
to be in any of the current subnets, let's call the ADSL ip A and the work
ip B). Once that is up, you will need to tell the ADSL router (via a static
route) that there is a route to the work network with the gateway being B,
and the work network that there is a route to the adsl network with the
gateway being A, and there is a route to the fake ip network with the
gateway being A.

As far as creating the tunnel, that is up to you. pptpd + pptp client can do
it, so can vpnd, so can a number of other programs. read the mailing list
archives, i've listed them before.

Also keep in mind that anyone that can get into your local network can now
get into your work network, so be careful.

Kevin
----- Original Message -----
From: Steve <steve at iconz.co.nz>
To: <pptp-server at lists.schulte.org>
Sent: Tuesday, November 16, 1999 12:00 AM
Subject: [pptp-server] routing realworld ip addresses via pptp


> Hiyas :)
>
> i'm new to this list and havent quite gotten to the point of setting up
> PoPToP yet but was wondering if anyone had a solution to this.
>
> basicly, what i want to do is try and route a small netblock of realworld
> IP addresses via a NAT'd ADSL connection back to the net. the setup would
> be similar to the following..
>
> | 210.48.7.0/240 |---|Linux|-----|ADSL|-----|Linux|---|Internet..
>                              |            |     |
> 192.168.1.0/24 (NAT)---------/            |     |
>                                           |     |
> (NZ Telecoms ADSL Network 210.48.81.0/24)-/     |
>                                                 |
> (Work LAN - 210.48.22.0/24)---------------------/
>
> from the way i figure it (which is probably completely wrong :) ) is that
i
> should be setting up a ppp interface on the local linux box in the
> 210.48.7.0/240 subnet which is used by the local clients as teh gateway
and
> one end of the tunnel, then establish a tunnel back thru to the linux box
> at the far end useing PoPToP - terminating the tunnel with an address in
> say the 210.48.23.0/24 range, then turn on ip forwarding on the
> 210.48.22.0/24 server and add a static route pointing to that machine for
> the 210.48.7.0/240 network.
>
> this is probably a particuarly long winded way to do things and i saw
> previously a post by someone advising the person to use vpnd - had a quick
> look at that but was wanting to try and find some way of useing PPTP as
the
> same could possibly be done with an NT server behind the ADSL box (not
sure
> if vpnd would work in that instance) connecting back to the linux machine
> and authenticateing with PoPToP.
>
> can someone please shoot me down over this idea ? :)
>
> TIA
>
> --
> Steve.
>
>
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