I have a box running Ubuntu 12.04. There i have eth0 which is used as local network no internet. But i have also in that same box wlan0, and WiFi availability.
Now how can i have both interface active? So that eth0 remain as it is, but wlan0 also get auto active to specific WiFi as fixed. When ever internet inbound/outbound access requires, i want to use wlan0 interface, not the eth0 interface as it is used already for webservice in local networks.
Any ideas how to achieve this? ( i tried this but not working for both interface https://help.ubuntu.com/community/WifiDocs/WiFiHowTo )