Possible causes:
Check how many network cards are installed in your system and if you are configuring the correct NIC card
Check the interfaces configuration settings
$ cat /etc/network/interfaces
Do not forget to restart the networking daemon after each change
$ sudo /etc/init.d/networking restart
Some of the commands that can come in handy for troubleshooting the cause of the problem …
$ route -n
$ traceroute
$ netstat
Tags: cannot connect to destination, network connection, network problem, network setting, NIC, ubuntu network
