Hi,

I have two network interfaces (etho & eth1) on my ubuntu machine, both working properly.

eth0 is connected to another ubuntu PC.
eth1 is connected to a wireless lan for Internet.

The problem is I cannot connect to the Internet. Firefox return page not found for all websites, I cannot ping google etc.

However, if I disconnect eth0(connected to a PC) and restart my machine, I am able use the Internet via eth1.

How could I configure my machine use eth1 to connect to the Internet while eth0 is also connected to another PC.

Thank You,
Andrea

Following is my ifconfig:

eth0 Link encap:Ethernet HWaddr 08:00:46:6A:0C:B0
inet addr:169.254.4.217 Bcast:169.254.255.255 Mask:255.255.0.0
inet6 addr: fe80::a00:46ff:fe6a:cb0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8208 (8.0 KiB) TX bytes:3006 (2.9 KiB)

eth1 Link encap:Ethernet HWaddr 00:02:2D:6D:C4:65
inet addr:172.19.96.201 Bcast:172.19.97.255 Mask:255.255.254.0
inet6 addr: fe80::202:2dff:fe6d:c465/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:36287 errors:0 dropped:0 overruns:0 frame:0
TX packets:9456 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:14369032 (13.7 MiB) TX bytes:1486526 (1.4 MiB)
Interrupt:9 Base address:0x3040

Look at your default gateway using the 'route' command. Your default gateway is usually defined according to the network on your eth0 NIC but you can change it to point to the network on your eth1 NIC by adding the 'route default gw 192.168.1.1' command in /etc/rc.local.