Gentoo router - iptables?

[groovin]

i need to setup a gentoo box to act as a router between two private subnets:

192.168.0.0/24---Gentoo box---192.168.1.0/24

every search on linux routing I do brings up iptables.

Is iptables a requirement to run a router? Are there any other requirements (emerge --pretend iptables shows not depends)?

thanks

[pathose]

iptables are something you compile into your kernel. I'm not sure about what else needs to be emerged, you'll have to dig through the portage tree and get back to us . Once you have iptables compiled either into your kernel or as a module, you need to write a routing/firewall script. I'd recomend looking into fireHOL; i haven't set this up yet, but this looks like the tool to use. # emerge firehol should do the trick, i'd imagine.

[kpack]

IPTABLES has nothing to do with setting up routing.

Do the following:

Make sure routing is configured into your kernel.

Then, enable it:

echo "1" > /proc/sys/net/ipv4/ip_forward

Then read the following documentation:

man route or
man ip

The first one uses the classic route command, the second uses Alexey Kuznetsov's iproute2 tools.

I'm not which Gentoo config file is the right place to store these commands, once you work them out from the command line. Maybe another use knows.

[groovin]

just got it.

I edited /etc/sysctl.conf and changed

net.ipv4.ip_forward = 0

to

net.ipv4.ip_forward = 1

then i enabled it with

# sysctl net.ipv4.ip_forward=1

and it works. Pretty much the equiv of what you posted kpack.

thanks again for the help everyone!