[Gentoo Internet Router] Basic configuration help

emilio_wuerges · n00b Joined: 07 Jul 2005 Posts: 6

Hello,
During all my life I only had 1 valid IP address and used the Gentoo Home Router guide to set up my network.
But now I'm in a situation that I have a range of ips xxx.xxx.60.240/255.255.255.192.

So I'm lost. I don't even know how to start.

I want to setup my network so 1 machine will serve as a firewall and DHCP servers.

What should I do? Do you know where I find a nice guide to do it?

d2_racing · Posted: Mon Mar 15, 2010 8:35 pm Post subject:

Ok, if I understand, you will have a box in front of your lan, and all your box with pass thrue that box.

If so, you will need to use the forward command, so that the trafic can pass from the net, thrue the firewall and end up on your box.

And the same goes for the other direction.

emilio_wuerges · n00b Joined: 07 Jul 2005 Posts: 6

Hi.
Thanks for the quick reply.

My network setup will be quite simple:

(Internet) -- eth0 -- (linux firewall) -- eth1 -- switch -- (my boxes).

So the configuration you suggest is something like:

iptables -A FORWARD -i eth0 -d *.60.240/26 -j ACCEPT
iptables -A FORWARD -i eth1 -d -j ACCEPT

But what about routing?
What dhcp server should I setup?

d2_racing · Posted: Tue Mar 16, 2010 12:43 am Post subject:

shazeal · Posted: Tue Mar 16, 2010 2:43 am Post subject:

http://wiki.archlinux.org/index.php/Simple_stateful_firewall_HOWTO

I used this setting mine up. Just used dnsmasq for DNS/DHCP.

d2_racing · Posted: Tue Mar 16, 2010 3:21 am Post subject:

That's a nice wiki indeed

d2_racing · Posted: Tue Mar 16, 2010 3:28 am Post subject:

I wrote that a wild ago.

You can compare the 2 scripts : http://www.gentoo-quebec.org/wiki/index.php/Utilisation_de_Iptables_pour_d%C3%A9butant