Re: fake static IP; SBC; Netopia; VPN and NAT

[Chuck Morehead <cbmorehead@xxxxxxxxxx>]

Jerome,

I'm a little confused about what you are saying.  We use, and have clients
using, SBC's aDSL offering with NAT.  SBC offers static IP addresses, i.e.
public IP's, that you can use as needed.  E.g. you might assign a public IP
to the router and have it use NAT to use private IP's inside the LAN.  And I
have never had a problem connecting to a client's VPN, even though we have
this scenario.  The only problem I have ever had was that I had to
reconfigure the router that SBC provided to a client so that it would work
with their firewall and VPN appliance - but I expected this since their
techs won't configure the LAN side of the router anyway, just the WAN side
so that they can test.

Perhaps I am missing part of your problem.  Could you expand on what your
configuration is and where you are having problems?

Chuck


----- Original Message -----
From: "Jerome Draper" <jdraper@trilosoft.com>
To: <midrange-l@midrange.com>
Sent: Wednesday, March 06, 2002 12:10 PM
Subject: fake static IP; SBC; Netopia; VPN and NAT


> SBC fake static IP address:
>
> For those interested in VPN and the requirement for static IP I have
> finished trudging my way through a morass spun by SBC.  Althought their
lit
> says they offer static IP's they really don't.  The static IP's the
"offer"
> are inside my customer's LAN which is useless as the customer uses NAT and
> private addresses inside.
>
> To check whether a Netopia DSL router (in this case an R3100T) is using
> "fake" IP addresses do the following from the quick menus:
>
> Under user profile <internet>, if you see the IP address 127.0.0.2 you
know
> that this is Netopia's way to ask for a userid/pw for chap authentication
> instead of an IP address for authentication; In this case the router gets
it
> 's IP address from a server (in SBC's case a Radius server) instead of as
> defined in the router.
>
> You cannot do either NAT or VPN with this setup.
>
> Hoping to save others from the fray.
>
> Jerry
>
>
>
> Jerome Draper, Trilobyte Software Systems, since 1976
> Network and Connectivity Specialist -- Mac's, LAN's, PC's, Linux, Sun, and
> iSeries
> Representing Synapse, Nlynx, Perle, CLI, Intermate and Others .....
> http://www.trilosoft.com - (415) 457-3431 - (415) 258-1658fax -
> jdraper@trilosoft.com
>