2 nic gateway issues?!

[smurfd]

Hey!

So im having abit of a blackout here. Have had this done a few years back, but um due to hardware failure and such now i need to set it up again.
And i dont have saved my confs and such.

So the scenario is like this : {Internet} - [Gateway] - [Workstation]

i have two nics in my gateway. eth0 and eth1.
eth0 gets its ip from dhcp.
eth1 is lets say 192.168.1.1

and my workstation has 1 nic, eth0, with lets say 192.168.1.2
so here if i understand things correctly i'd put in my /etc/conf.d/net
config_eth0=( "192.168.1.2 netmask 255.255.255.0" )
routes_eth0=( "default via 192.168.1.1" )
than that shouldnt be any more issues.

But on the gateway/Router?!
it demands some ip-forwarding mojo, right?

tnx for any advice.

[salmonix]

It needs IP forwarding AND ip masquarade too to reach the net.
Forwarding would "connect" the 2 NICs of your router passing traffic between them (you can set it in /etc/sysctl.config permanently). Masquarading (iptables) would carefully translate the address of the real source - the client NIC - to the server external NIC there and back. So, both is needed.

See Gentoo Wiki: Advanced routing (or so)
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