Kernel/network Routing, Kernel/Network Routing

[alanfullmer]

I have a question maybe someone can help with.

The O/S I am running is pretty much a vanilla install of Fedora Core 3.

I have two NIC's in the machine. Eth0 and Eth1

I am attempting to separate the two networks and its traffic.

Here is an image: http://www.xnote.com/~alan/web/routing_problem.jpg

ETH0 has a network of 166.70.122.0 mask 255.255.255.128 and gw 166.70.122.1
ETH1 has a network of 166.70.133.128 mask 255.255.255.224 and gw
166.70.133.129

Since I have to have a default gateway, I have it set to 166.70.122.1

However, all traffic from the ETH1 goes out the default gateway, which I guess makes sense.

I attempted to add a gw for that network through the route command, so I get
this:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
166.70.133.128 166.70.133.129 255.255.255.224 UG 0 0 0
eth1
166.70.133.128 0.0.0.0 255.255.255.224 U 0 0 0
eth1
166.70.122.0 0.0.0.0 255.255.255.128 U 0 0 0
eth0
0.0.0.0 166.70.122.1 0.0.0.0 UG 0 0 0
eth0


However the outbound traffic from IP 166.70.133.133 still goes out the default gateway.


My goal is to essentially create a router or something that directs all traffic for each network to its proper gateway.

Thanks in advance for any help.

-Alan
alan@xnote.com

[puntmuts]

It is possible A good read is http://www.lartc.org/howto/ .
You could think of using conditional multipath routing using a firewall mark using iptables . I made something like that some years ago and that worked. I head three external ip's in the same network but that is history

But I think you will find means to accomplish this when reading the HOWTO, at least I did .
Good luck

[swemic]

But what happens to your routing table when you add an extra default route at your command shell?
I.e.

route add -net 0.0.0.0 -netmask 0.0.0.0 gw 166.70.133.129 eth1