Re: Dual Nic, Dual IPs

[Adam Garside <lemming@gimp.shacknet.nu>]

Have you enabled ip forwarding in your kernel ?

e.g. '/proc/sys/net/ipv4/ip_forward = 1'

-asg

Matthew Daubenspeck wrote:
> I am having some issues with making a dual nic, dual IP woody system
> working properly. Here is the basic setup:
>
> eth0: 172.17.0.1 Subnet 255.255.0.0 Gateway 172.17.255.254
> eth1: 192.168.10.3 Subnet 255.255.255.0 Gateway 192.168.10.1
>
> I have djbdns/dnscache running on the eth0 IP. This seems to work
> perfectly.
>
> I then have djbdns/tinydns running on the eth1 IP. It seems to work
> locally and for anything on the same LAN, but does not seem to pass info
> properly through the gateway.
>
> I manually added the following route:
> route add -net 192.168.10.0 netmask 255.255.255.0 gw 192.168.10.1 eth1
>
> route shows:
> # route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.10.0    192.168.10.1    255.255.255.0   UG    0      0        0 eth1
> 192.168.10.0    *               255.255.255.0   U     0      0        0 eth1
> localnet        *               255.255.0.0     U     0      0        0 eth0
> default         172.17.255.254  0.0.0.0         UG    0      0        0 eth0
>
> I'm sure my mailer botched that up, but as far as I can tell it looks
> right. However, nothing on the eth1/192.168.10.3 interface properly
> "travels" through the appropriate gateway.
>
> Any ideas on what I am missing? It's driving me nuts. Thanks in advance.