I have a CentOS System with two NICs on it. One is Ethernet the other is Wireless.
The Ethernet has an address of 192.168.1.110 and is tied to a LAN. (The LAN provides DHCP and DNS for its domain of 192.168.1.*)
The Wireless card should have an address of 131.238.. and is tied to the WAN.
For some evil reason, I can get the WAN to work for a short amount of time then it suddenly dies. I have to turn on/off the connection to get it to work again.