Help setting default Network card

phyberoptix · 11-05-2004, 03:21 PM

I have 2 nics in my linux box (FC2). One is connected to the internet, and the other is an internal lan connector. I want to be able to use the external (internet) interface as default, and set up a routing table (?) to tell linux when to use the internal (lan) nic.

for example, my internal nic should handle all traffic to and from:
168.218.*, 168.110.*, 129.39.15.*, 199.166.240.*

and the external (internet) adapter should do all other traffic. This way, when I open a web browser on my box, it will by default use the external (internet) nic, and if I need specific items from my internal network, the box will use the internal (lan) nic.

The internal (lan) ip is 168.218.58.100/255.255.255.128
The external (internet) ip is 192.168.2.100/255.255.255.0

Could someone help me with this? I've searched for some specific examples, but can't seem to hit it right.

Thanks in advance!

gabriele_101 · 11-05-2004, 03:54 PM

Try Running:

Code:

route del default
route add -net 168.218.0.0 netmask 255.255.0.0 eth1
route add -net 168.110.0.0 netmask 255.255.0.0 eth1
route add -net 129.39.15.0 netmask 255.255.255.0 eth1
route add -net 199.166.240.0 netmask 255.255.255.0 eth1
route add -net 0.0.0.0 netmask 0.0.0.0 eth0

You may have to delete some other routes first (not just the default route, which we re-create in the last line), so feel free to post the output of

Code:

rout -n

before you run the above commands.

And if you want to know how to make it last, follow my link, if someone ever answers:

http://www.linuxquestions.org/questi...hreadid=251500

-Gabriele

OrphanedLand · 11-05-2004, 04:41 PM

Hello friend,

I think that your Internal NIC is eth0 and External NIC is eth1

This commands must do what you want...

route add -net 168.218.0.0 netmask 255.255.0.0 dev eth0
route add -net 168.110.0.0 netmask 255.255.0.0 dev eth0
route add -net 129.39.15.0 netmask 255.255.255.0 dev eth0
route add -net 199.166.240.0 netmask 255.255.255.0 dev eth0
route add -net 0.0.0.0 netmask 0.0.0.0 dev eth1

If you understand you correctly and I am not wrong, this is the solution for you...

Goodluck