[ubuntu] Wire(eth0) and wireless(wlan0) cannot work at the same time

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http://ubuntuforums.org – I have tried to get both my wire(eth0) and wireless(wlan0) to work at the same time but it cannot work either wire or wireless at one time.Below is what i have edit my /etc/network/interfaces. Can only work in Wire(eth0) but have to disable wireless otherwise cannot get connect Code: auto lo iface lo inet loopback auto wlan0 iface wlan0 inet dhcp auto eth0 iface eth0 inet dhcp   pre-up iptables-restore < /etc/iptables.rules   pre-up ip6tables-restore < /etc/ip6tables.rules   p (HowTos)