Add a gateway to your routes using "route"

From your prompt do:

route add default gw <ip address of gateway ex. 10.0.0.1>

ifconfig and how to change your ethernet device ip address

The command ifconfig is your friend here. From the console, take a look at your routes:

machine:~$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        *               255.255.0.0     U     0      0        0 eth1
63.171.219.64   *               255.255.255.192 U     0      0        0 eth0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         63.171.219.65   0.0.0.0         UG    0      0        0 eth0

Now run ifconfig:

machine:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:30:48:27:0F:5A  
          inet addr:63.171.219.113  Bcast:63.171.219.127  Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:247046 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19554 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:19011402 (18.1 Mb)  TX bytes:3264987 (3.1 Mb)
          Base address:0x3000 Memory:fc200000-fc220000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:56 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:4226 (4.1 Kb)  TX bytes:4226 (4.1 Kb)

eth1      Link encap:Ethernet  HWaddr 00:FF:22:8B:40:66  
          inet addr:10.0.0.1  Bcast:10.0.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:615 errors:0 dropped:0 overruns:0 frame:0
          TX packets:929 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:82476 (80.5 Kb)  TX bytes:83950 (81.9 Kb)

Let's change our eth1 IP Address - first, let's bring eth1 down:

machine:~$ ifconfig eth1 down

and now let's change the IP Address:

machine:~$ ifconfig eth1 10.0.1.1 netmask 255.255.0.0

And that's pretty much it!

Pt. Reyes

Took a trip out to Pt. Reyes over the weekend! First time ever being there - it was windy but still very nice!