Trying to make Red Hat 9 router

[Ken g6]

And it's not working. I'm trying to connect two windows boxes through the Red Hat box I just set up.

I connected the three boxes with ethernet cards and crossover cables like so:
(I could use a switch, but I had all the materials and I want to learn how to set this up.)

Win1
192.168.0.1
|
192.168.0.7
Red Hat 9 box
192.168.1.7
|
192.168.1.2
Win2

My Kernel routing table is:

Destination.....Gateway.........Genmask.........Flags...MSS.Window..irtt.Iface
192.168.1.0.....*...............255.255.255.0...U.........0.0..........0.eth1
192.168.0.0.....*...............255.255.255.0...U.........0.0..........0.eth0
169.254.0.0.....*...............255.255.0.0.....U.........0.0..........0.eth1 (something with IPV6? It shouldn't matter)
127.0.0.0.......*...............255.0.0.0.......U.........0.0..........0.lo
default.........192.168.0.1.....0.0.0.0.........UG........0.0..........0.eth0

Edit: Oh, yes, my problem. Both Windows boxes can see both addresses of the Linux box, but neither Windows box can see the other.

Any idea what I'm doing wrong?

Thanks!

 

[cmetz]

IP forwarding is off by default, you must enable it to forward between subnets. This is a good thing - there's historical precedent of Sun boxes that would magically start routing when they had more than one Ethernet interface, and those boxes caused all sorts of grief in the field.

Try:

echo 1 >/proc/sys/net/ipv4/conf/all/forwarding

depending on kernel version, you might have to do each interface separately for it to actually take:

echo 1 >/proc/sys/net/ipv4/conf/eth0/forwarding
(etc.)

 

[Ken g6]

It worked! Thanks!

They never taught me *that* in networking class.