[ubuntu] network configuration

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http://ubuntuforums.org – Hi Guys! I am beginner with Ubuntu 12.04 and I have the following problem with my network configuration. I have 4 PC with following configuration wireless router with IP: with internet access PC1 eth0 IP: SM: GW: PC2 eth0 IP: SM: GW: wlan0 IP: SM: GW: PC3 wlan0 IP: SM: GW: PC4 wlan0 IP: SM: GW: PC2 has a Wireless card connected with the wireless router and an Ethernet card connected (Hardware)