internet access problem - was: Re: Help !!

[Peter l Jakobi]

On Wed, Dec 17, 2008 at 02:02:50PM +0100, Hannah Josephine Dippe wrote:
> Hello to you all,
>  
> I set up my old ThinkPad i1200 with ubuntu 8.04 lts. 
>  
> For networking I used a D-Link W-Lan-PC-Card witch is installed
> by ubuntu properly. I can ping all devices in my network.
...
> The PC-card is active as <eth0>, but unknown as interface??

you're  using  a  wlan; even if the pccard is really called  eth0,  it
still  isn't ethernet. You're using TCP over WLAN, e.g. when you  used
ping (that is ISO/OSI level 3, routed connections, etc pp)


> At last, I tried to bring up a connection to the internet over
> PPPOE. This task failed, because the assistent didn't find
> an usable Ethernetmodem.

pppoe  is an application talking to ethernet modems directly at  level
2,  that  is  it  doesn't  even talk  tcp/ip  (unless  maybe  for  its
management interface if any).

Examples  for old ethernet modems usable via pppoe are maybe the orkit
series  of  dumb ethernet modems. However, to see them you DO need  to
run  a  physical  ethernet cable between modem and  computer  w/o  any
router or wlan inbetween.

Thus  you'll quite correctly won't see any Orkit or similar modem over
the WLAN interface. 

Of  course  you could use the wlan to connect to a router  (tcp),  run
PPPOE  *on*  the  router  (linux pc, wrt54g, whatever),  and  have  an
ethernet  cable  between router and ethernet modem. 


Newer  dsl  internet access hardware usually is a router,  maybe  even
with  a  wlan interface. These you talk to via TCP/IP, by making  them
the  default  route  for your computer. TCP/IP can be  routed  between
ethernet lans and wlan cells, so this would work.

cu
Peter
-- 
cu
Peter l Jakobi
lists at kefk.oa.shuttle.de