For a standard A/DSL modem/router these days (in Australia anyway),
the PPoE only needs to be setup from the modem to the exchange of the
service provider. The client facing interface/s (ie: RJ45 ethernet
connection/s) is typically standard ethernet. The ADSL modem has a
inbuilt router with NAT and a DHCP server (to hand out local IP
addresses) and a DNS chaching server. Following is a crude diagram of
a typical setup:
__________________________________
******** | ADSL modem + router
|
** |
--------------------------------- |
Internet**-------------|-----Real-IP NATed Gateway IP
--|------------------------- Your PC 1
** | (203.14.1.99)
(192.168.1.1) | | (192.168.1.5)
******** | DHCP
server | |
| DNS caching
server | \ ------------------Your PC 2
|
Router | (192.168.1.6)
|__________________________________|
# Problem 1: Most ADSL modems have only IP-V4. But Ubuntu has IP-V6
enabled by default. This used to cause problems with getting DNS and
IP info via DHCP requests. Some solutions in the past have been to
blacklist IP-V6 on ubuntu.
# Problem 2: Some ADSL modems with single ethernet ports have buggy
DHCP firmware where the DHCP fails to handout new IP addresses if the
MAC address of the PC changes (eg: a different network card). This is
easily fixed by power cycling the modem.
# Problem 3: Ubuntu sometimes fails to get DNS info from DHCP
requests. Workaround for this is to "append" your Service providers
DNS server addresses to the "/etc/dhcp3/dhclient.conf" file. eg: add
the following line
append domain-name-servers <Service provider DNS1>,<Service provider
DNS2>;
NOTE: make sure you include the trailing ";".
Cheers
Janaka
On Feb 19, 3:25 am, Christopher Stamper <[email protected]>
wrote:
> On Wed, Feb 18, 2009 at 11:04 AM, Dan
> <[email protected]>wrote:
>
>
>
>
>
> > On Feb 16, 11:57 am, Christopher Stamper
> > <[email protected]> wrote:
> > > On Mon, Feb 16, 2009 at 11:53 AM, Gullybor <[email protected]> wrote:
>
> > > If the 'modem' is one of those cheesy router/modem combo's, then you'll
> > have
> > > to refer to it's documentation.
>
> > I installed Ubuntu 8.10 on my Dell mini9 last night after 3 weeks of
> > trying (without success) to get wired or wireless internet access
> > under the Dell version of 8.04 that ships on the mini. Plugged in the
> > ethernet cable and "bam" I was connected to the internet. I tried to
> > establish a wireless connection and could not. I have one of the
> > cheesy router/modem combos mentioned above...Westell 327w from
> > Verizon, using Verizon DSL.
>
> > I reconnected the ethernet cable and downloaded a LOT of updates,
> > installed, rebooted and cannot get a wired connection. I configured
> > the PPPoE settings so they're the same as my WinXP desktop...no joy.
> > I'm beginning to suspect the lousy router/modem is the source of all
> > (well, OK, most) evil.
>
> > Anyone have any thoughts or suggestions...Verizon DSL, Dell mini9,
> > Ubuntu 8.10, no wired or wireless connection.
>
> I suggest to all of you: get a router.
>
> Or, configure your combo modem thing to work properly.
>
> I suspect that this isn't even an issue with ubuntu, but rather your config.
> So if you plugged a fresh Windows XP install in, it probably wouldn't work
> either.
>
> @OP: try doing what Janaka said(dhpclient), and post the results.
>
> @Dan: unconfigure the PPoE. If you really have a router, you don't need this
> setting at all. Then, open terminal, type 'ifconfig', and post results.
>
> --
> Christopher Stamper
>
> Email: [email protected]
> Web:http://tinyurl.com/2ooncg
> gTalk:http://tinyurl.com/6e359r
> Skype: cdstamper
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