And, now, a rendering in ASCII:
------------------
| MONSTER (Server) | <-- eth0:10.10.10.10, static
------------------
|
------------------
| SHUTTLE (Router) | <-- eth1 outside (dhclient) / eth0:10.10.10.1
inside (dhcp3-server 10.10.10.0/24)
------------------
|
----------------
| D-Link DCM-202 | <-- 192.168.100.1 (Static, not user configurable)
----------------
|
(@@@@@@@@@@@@@@@)
( Comcast World ) --> The Internet
(@@@@@@@@@@@@@@@)
|
----------------
| D-Link DCM-202 | <-- 192.168.100.1 (Static, not user configurable)
----------------
|
----------------
| Unknown Router | <-- DHCP Server (192.168.100.0/24)
----------------
Every so often, I get 192.168.100.2 leased to my router from
192.168.100.1 with a lease of 13 seconds. Very annoying. Even though
I have ignored this server, there is still a network interruption
which prevents browsing, file transfers, remote sessions, and so
forth.
On Sun, Feb 27, 2011 at 6:25 PM, Mr O <[email protected]> wrote:
>
> How the heck are you addressing two separate physical modems? Not to mention
> a consumer cable modem doesn't do DHCP. How exactly are you connected to the
> internet?
>
>
> --- On Sun, 2/27/11, Jackman <[email protected]> wrote:
>
> From: Jackman <[email protected]>
> Subject: Re: [Eug-lug] Disabling a rogue DHCP server
> To: "Eugene Unix and Gnu/Linux User Group" <[email protected]>
> Date: Sunday, February 27, 2011, 4:59 PM
>
> It turns out that they are using the same modem as myself, which maintains a
> web server on 192.168.100.1. It is a dlink dcm-202. Because this overlaps
> with the rogue dhcp subnet, I only hit my local modem when I use a browser.
> Moreover, even if I hit the remote modem, there are no settings I can change
> on it and it doesnt get me to the offending dhcp server. I hope that makes
> sense.
>
> The dhcp lease originates from 192.168.100.1, issuing to me .2. I use only
> 10.10.10/24 addresses on my network. Would you like me to send my
> documentation on this problem to the mailing list?
>
> On Feb 27, 2011 4:16 PM, "Mr O" <[email protected]> wrote:
>
> How about the obvious, has your computer taken a lease from the 'rogue'
> server? Have you looked at the gateway address and tried to connect to it?
> Most routers are still set to admin/admin. With the gateway information you
> can narrow it down to which box or device as well. What kind of address is
> it? 10.? 192.? Do you have physical access to everything?
>
>
> --- On Sun, 2/27/11, Jackman <[email protected]> wrote:
>
> > From: Jackman <[email protected]>
> > Subject: Re: [Eug-lug] Disabling a rogue DHCP server
> > To: "Eugene Unix and Gnu/Linux User Group" <[email protected]>
> > Date: Sunday, February 27, 2011, 3:23 PM
>
> > Unfortunately, while I'm able to
> > reject those offers, my connection is
> > still cutting out ever ...
>
> -----Inline Attachment Follows-----
>
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--
Andrew Jackman
[email protected]
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