Unable to connect to the Internet via LAN despite the connection showing as established

Posted by Vikram on Ask Ubuntu See other posts from Ask Ubuntu or by Vikram
Published on 2011-10-21T15:50:12Z Indexed on 2012/04/01 23:39 UTC
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11.10

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networking

I have installed Ubuntu 11.10. I am facing a problem connecting via LAN. We have a firewalled network. After entering static IP, gateway, DNS, etc., it shows connection as established but we are unable to use the Internet using the wired connection (LAN).

While checking system testing following error shows under network test:

ERROR:root:Could not find def gateway info in /proc 
ERROR:root:Could not find default gateway by running route

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