Fedora Box with TWO NIC's

[Julian Underwood]

Scroll down for the output of netstat -nr!


I have a Fedora box with two working NIC's:

DSL, static IP:
(NIC 1)
ip:168.101.199.6
nm:255.255.255.248
gw:168.101.199.5
dns:168.101.1.3, 168.101.1.9


LAN, has a sonicwall router to Cable modem:
(NIC 2)
ip:192.168.0.7
nm:255.255.255.0
gw:192.168.0.1 (currently NOT SET so at least the DSL NIC is functional)
dns:not needed

With this setup, /nothing/ works. Can't ping anything, can't browse from 
the box locally, nothing. However if I remove the gateway on NIC 2 
(192.168.0.1), then I can at least browse through NIC 1 and it can be 
pinged. However--the LAN interface is still useless, can't ping it.

The reverse works the same. Remove the GW on NIC 1 (168.101.199.5) and 
place it on NIC 2 (192.168.0.1) then I can browse through NIC 2 on the 
Cable modem side, but then the DSL NIC becomes useless (can't ping).

So I am asking, what is the trick to make BOTH interfaces work and if the 
server needs to go out onto the net, it will by default browse out on the 
DSL side of things? I would like to be able to manage the server and 
provide file services from the LAN side.

John Meagher Wrote:
----

You need to have the default route set to the cable modem and a specific 
route in place for the internal lan, so that for everything except the 
internal lan, it will go out to the cable modem. Do a "netstat -nr", or a 
"route print", and let's see what you have.

----

$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
168.101.199.6   0.0.0.0         255.255.255.248 U         0 0          0 eth1
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth1
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
0.0.0.0         168.100.199.5   0.0.0.0         UG        0 0          0 eth1

Again, I think this output is with my LAN NIC disabled, again: the LAN NIC 
doesn't have a gw because /nothing/ works when it is defined.  Goal: be 
able to provide management and file services from the LAN NIC and still 
function with the DSL NIC.

Thanks,

Julian