Re: [Sheflug] getting dhcp from cable with linux

[Lesley Binks <lesley.binks@xxxxxxxxx>]

Robin Wood wrote:
> Hi
> I've just had cable installed and to test it I fired up windows,
> plugged the laptop into the modem and instantly got an IP through dhcp. I
> rebooted into linux and no joy, dhcp just timed out.
> 
> I've watched packet traces and the dhcp request is being sent out and
> dhcp offers are coming back but the client is ignoring/reject them. I've
> tried arch linux, knoppix, bsd, openwrt and a cable router, none of them
> can get an IP. Windows just works. Has any one else had this problem? I
> really need a way to fix it so I can get my network built up rather than
> just having to rely on a single windows laptop for all my internet
> activity.
> 
> I've also tried hand setting the IP stuff but that didn't work. Watching
> the TX/RX count in ifconfig shows that loads of data is coming back in
> response to my requests on all the platforms.
> 
> The modem is a motorola 5100 surfboard.
> 

This may be a firewall (iptables) or dhcp config problem.  I have had
similar in the past but I can't remember what I did to fix it.  I think
it was in the config and was between a router and a NiC so I had control
of both ends.

Check your dhcp config very carefully first.

man -k dhcp

will give you a list of what help you have on your system and have a
look at the config files.

If that produces no joy then it may be the firewall but do persist with
the config first.

http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
http://www.dhcp-handbook.com/dhcp_faq.html

might be worth a read if you get no joy with config approach.  ( or even
if you do!)

Regards

L.

Regards

L.

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