Running Ubuntu 13.04
I am trying to configure a machine as a drbl server so I can use clonezilla to master a bunch of machines. But before we get to that point, I was just testing the networking. I have an unmanaged, 1Gb switch. wlan0 is connected to the internet as 192.168.1.149.
I want to setup a second private subnet on eth0.
sudo eth0 down sudo eth0 up sudo eth0 126.96.36.199
Then, on a windows machine, we manually set ip to 188.8.131.52
We can momentarily ping each other. But when I try to run putty from the pc, suddenly the network is unavailable, and ping no longer works in either direction. The problem is definitely on the linux side, ifconfig eth0 reports no ip address.
Either there is some automated utility changing our network settings, or it could be a firewall.
I tried to run NetworkManager, but get the error "NetworkManager is already running"