Two network cards to work together

[cleytondim]

Hello,
I have a big problem.
I'm trying to set up a ltsp server in my ubuntu 11.10

My server have 2 network cards (one onboard, eth0, to my dhcp server, and one offboard, eth1, to my internet connection).

The problem is: the network cards dont work together. The ltsp-server is working fine with the eth0, the clients get the system and start it. But the internet didn´t work (neither in the clients nor int he server). The internet only work in the server if i disable the eth0 interface.

I should mention that the eth0 dont have gateway configured, so it should work fine with the two cards, since only one have the gateway. But Dont :confused:

Do someone know why is it happening?


ps: sorry for the bad english. i'm brazilian.

[dandnsmith]

I very much suspect that the route table doesn't have the required entries.

Could you post the output of
sudo route
which could help verify this.

There are schemes for setting up the required routes or otherwise effecting your scheme - but I'm not one who knows how to do this (have a look at some of the recent threads which treat with dual ethernet interfaces).

Start with this thread (http://ubuntuforums.org/showthread.php?t=1564081)
more from this (http://ubuntuforums.org/showthread.php?t=1947572) and look at the link to masquerading set up article in the last posting.