comp.os.linux.networking

My company's Linux server has the following interfaces:

eth0, eth1, eth3, lo (I don't know why eth2 is missing).


Their settings:

eth1:
DEVICE=eth1
BROADCAST=218.111.104.107
IPADDR=218.111.104.106
NETMASK=255.255.255.255
NETWORK=218.111.104.104
ONBOOT=yes
TYPE=Ethernet
GATEWAY=218.111.104.105

eth0:
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.42.1
NETMASK=255.255.255.0
GATEWAY=218.111.104.106

eth3:
DEVICE=eth3
ONBOOT=yes
IPADDR=192.168.43.1
NETMASK=255.255.255.0
GATEWAY=218.111.104.106

There are 2 network segments; one segment with IPs type 192.168.42.*,
default gateway 192.168.42.1; the other of IP type 192.168.43.*,
default gateway 192.168.43.1.

I guess that eth0 and eth3 route thier internet traffic to eth1, which
I believe (not sure) is connected to an external ADSL modem (Lucent
CellPipe).

When I unplug the network cable from the modem, the server shows "eth1
NIC down".

When I plug in a Belkin G Wireless Router, the server shows "eth1 NIC
UP 100Mbps".

To the Belkin router (with 4 ports and a WAN port) I then connect a
wireless broadband modem via its WAN port (supposedly up to 1Mbps) for
internet access (wireless internet access, not wireless LAN). The
Belkin is configured with the user name and password.

I cannot access the internet via LAN. I am told the Belkin has a fixed
IP 192.168.1.1, which I fail to ping from the server. A laptop
connected directly to the Belkin port shows the router to have IP
192.168.1.1, and it has no problem accessing the internet.

I am think of changing the gateway of eth1 to 192.168.1.1. But I
suppose it is pointless if I can't ping the router.

Could somebody help ? Thanks.