How to eliminate default routes ? [WAS: Kicked me of self! :-/]

If I boot my router, my two cable modems get there IP over DHCP and all
two add a default (outgoing) route.

Because I want to route any "incoming" traffic (requests are coming from
computers inside my networks) through eth1 (downstream 32 MBit) the
default route to eth0 is to much and I have to remove it all the time
manualy which is not realy what I want.

Also I have nothing found in the docs how to prevent seting the default
route. I am missing something here.

So, if I remove the default route (to eth0) I can access the Internet
from ANY computer in the subnets...

How to prevent that the route is set automaticaly?

If this is working, I continue with the IPTABLES and the FORWARD of the
ports. But first I neet to get correctly Internet access.

Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
24V Electronic Engineer
Tamay Dogan Network
Debian GNU/Linux Consultant

--
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
<http://www.tamay-dogan.net/> Michelle Konzack
<http://www.can4linux.org/> Apt. 917
<http://www.flexray4linux.org/> 50, rue de Soultz
Jabber linux4michelle@jabber.ccc.de 67100 Strasbourg/France
IRC #Debian (irc.icq.com) Tel. DE: +49 177 9351947
ICQ #328449886 Tel. FR: +33 6 61925193