As mentioned in class, all of the SIFT2.1 instances are using the same MAC address.

Here's a way to change your MAC address. It's very likely not the most obvious or simple method, but after trying most of the obvious ones, I think that this method is probably the simplest.

First become root. Use "su - " (or "sudo su -").

Edit the file /etc/network/interfaces. Add the following lines: 

auto eth0
iface eth0 inet static
      address 192.168.128.[100+Desk #]
      netmask 255.255.255.0
      network 192.168.128.0
      broadcast 192.168.128.255
      gateway 192.168.128.1
      hwaddress ether aa:00:04:[hex:100+Desk #]:0a:04

Note that you have to change the two bits in brackets: change the first to a decimal number (e.g., "127") and change the second to the same number in hex ("7F").

Next, execute the following commands: 

chkconfig network-manager off
mv /etc/NetworkManager/nm-system-settings.conf /etc/NetworkManager/nm-system-settings.conf-OFF
mv /usr/sbin/NetworkManager /usr/sbin/NetworkManager-OFF
cp /bin/true /usr/sbin/NetworkManager
killall NetworkManager

Now edit your /etc/resolv.conf to add whatever nameservers you want. For instance, you can use our departmental ones like so: 

search cs.fsu.edu
nameserver 128.186.120.179
nameserver 128.186.120.178

Next, edit the file /etc/rc.local to bring up the network for you; add the two lines just before the "exit 0": 

ifdown eth0
ifup eth0

Finally, try an "ifconfig eth0" and make sure that you see your new hardware address in use and not the previous hardwired one.