[Gllug] ADSL (and DHCP) woes

[Chris Bell]

On Mon 30 Dec, chris.wareham at btopenworld.com wrote:
> 
> Last weekend I trod on my BT supplied modem (the fish shaped thing),  completely bugge
> ring it up in the process. Not a problem, as I'd been looking for an excuse to relace 
> it with a non-USB one for a while.
> 
> So I've now got a D-Link DSL-300G . Quite neat in principle, just plug it into an ADSL
>  filter and connect an ethernet cable from it to the computer. Configuration is via a 
> couple of web pages, no proprietary or Windows only guff.
> 
> But ... it uses DHCP to assign an address, netmask, gateway, etc. to the connected com
> puter. Works flawlessly on the Windows XP machine my girlfriend owns, but I can't get 
> it going under NetBSD. I've created a dhclient.conf file as descri
> bed in the manual pages, and it gets the address from the modem. But my networking set
> up looks entirely different under NetBSD than it does on Windows.
> 
> Under Windows, the computer has the address assigned by BT Openworld, which seems stra
> nge. I expected the computer to have a 192.168.0.* address, and to use 192.168.0.1 (th
> e modem's address) for both gateway and name server. Or the DHCP s
> tuff would setup the correct nameservers.
> 
> So has anyone used this ethernet modem with Linux? I'm at a loss as to what to do. I d
> on't want to dual home a Windows machine and stick my network behind that ...
> 
> Chris
> 
   There was some correspondence about this in the past, I was told that the
ADSL route over BT lines is set up point to point between you and the ISP,
and that a single assigned IP address can be allocated to your computer. An
external ADSL modem does require two IP addresses, but they do not need to
be routable past either end of the point to point link, so can be
non-routable addresses from the reserved ranges.
   Do you have a wires-only connection using a modem supplied by BT, or a BT
installed setup? I have a wires-only ADSL connection to Demon, and have to
set up an initial link with the BT test equipment, then disconnect and reset
the modem to link to an address allocated to me by Demon. You may need to do
something similar.

-- 
Chris Bell


-- 
Gllug mailing list  -  Gllug at linux.co.uk
http://list.ftech.net/mailman/listinfo/gllug