[Novalug] Follow-up ---> DHCP and Cox/Webstar Cable Modems

[Ken Kauffman]

I know on gentoo, I have to create a link like this for new NICs:

ln -sf /etc/init.d/net.eth1 /etc/init.d/net

Then configure /etc/conf.d/net, to include configurations for eth1.  
Then add it to the service runlevel:

rc-update -a net.eth1 default

Perhaps you need to create a runlevel start for eth1?

It sounds though that minimally you have figured out the DHCP/Cox problem.

Someone mentioned dhcp clients.  I've tried a few and had the least 
amount of problems with udchcp.

K

David Shambaugh wrote:
> I'm getting closer.
>
> The hint Ken gave about rebooting the cable modem was very helpful. So I
> went out and got a second NIC to begin the setup for the local network.
>
> So eth0 is working fine and finding the outside world Ok.  Then I had to
> manually do an ifconfig for eth1.  It came up.  One question is that when I
> rebooted the Linux box I had to go in and manually bring up eth1 again.  I
> thought ifconfig commands were supposed to "stick" after a reboot, some help
> with that would be nice too.
>
> Also... the saga continuses.  I guess I'm not as "UP" on things as I need to
> be or have trouble gleening information from the manpages and HOWTO docs.
>
> I setup the eth1 card to be 192.168.0.1 and then I went in and setup a DHCP
> server on the linux box for eth1.  I started it up and it all seems to be
> going fine.  I ran "#dhcpd " and got the message, eth0 will reject inquires.
> GOOD. I don't want the outside world looking into my computer. If I then go
> over to the windows machine that is looking at the linux box through the
> router and open a web brouser window and put "http://192.168.0.1" I even get
> the startup web page that I expected.
>
> But!!! if on the windows machine I try to go to another web page on the
> outside world. or ping the ip address for a known good server in the outside
> world it doesn't work.  So somewhere in the Masquarade, or firewall or DHCP
> server or maybe even in some other place I have to figure out how to make it
> so that inquires from the computers on the router get routhed to the outside
> world on eth0.
>
> Any suggestions?
>
> Thanks.
>
> David
>
>
> -----Original Message-----
> From: novalug-bounces at calypso.tux.org
> [mailto:novalug-bounces at calypso.tux.org]On Behalf Of Russell Evans
> Sent: Friday, April 13, 2007 2:05 PM
> To: novalug at calypso.tux.org
> Subject: Re: [Novalug] DHCP and Cox/Webstar Cable Modems
>
>
> On Thu, 12 Apr 2007 08:54:11 -0400
> "Ken Kauffman" <kkauffman at headfog.com> wrote:
>
>   
>> The cable modem is a routing device.  Cox is set up in a way that if
>> you plug a card with a different MAC address, you will need to
>> restart the router.  But, you need to shut it down, then wait a
>> little bit and bring the cable modem back online.  You can't just
>> switch the ethernet plug.
>>
>> In a nutshell -- changing the connected MAC address/NIC requires
>> rebooting the cable modem.
>>     
>
>
> If this doesn't clear the issue then I do know that one of the DHCP
> clients for Linux; pump, dcpcd, dhclient, ...,  had/has issues with some
> DHCP servers. I ran into this with a DLINK wireless router. I wish I
> could remember which client is was so I could be more precise.
>
> Anyway, if in the case rebooting the cable modem doesn't resolve the
> issue, try a different DHCP client.
>
> Thank you
> Russell
> _______________________________________________
> Novalug mailing list
> Novalug at calypso.tux.org
> http://calypso.tux.org/cgi-bin/mailman/listinfo/novalug
>
> _______________________________________________
> Novalug mailing list
> Novalug at calypso.tux.org
> http://calypso.tux.org/cgi-bin/mailman/listinfo/novalug
>