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I've set up an Ubuntu 14.04 virtual machine with two network adapters.

  • eth0 (bridged adapter) - 192.168.0.105
  • eth1 (NAT) - 10.0.3.15

I have performed ping commands to ensure everything is fine:

ping -I eth0 www.cnn.com
PING turner.map.fastly.net (185.31.17.73) from 192.168.0.105 eth0: 56(84) bytes of data.
64 bytes from 185.31.17.73: icmp_seq=1 ttl=55 time=29.6 ms

ping -I eth1 www.cnn.com
PING turner.map.fastly.net (185.31.17.73) from 10.0.3.15 eth1: 56(84) bytes of data.
From 10.0.3.15 icmp_seq=1 Destination Host Unreachable

Since I would like eth1 to be able to access Internet through the eth0 adapter, I have bridged them based on this Debian tutorial.

Now the command ifconfig shows me the following:

  • br0 - 10.0.3.16
  • eth0 (bridged adapter) - No IP
  • eth1 (NAT) - No IP

I can ping CNN like this:

ping www.cnn.com
PING turner.map.fastly.net (23.235.43.73) from 10.0.3.16 br0: 56(84) bytes of data.
64 bytes from 23.235.43.73: icmp_seq=1 ttl=63 time=26.6 ms

but can't ping with the individual interfaces anymore.

Why does it happen? How can I be sure that I can now indeed access the Internet via eth1?

  • What do you actually want to achieve? “Accessing the Internet via eth1” isn’t really a thing. – Daniel B Mar 27 '16 at 10:56
  • @DanielB - I would like to share the Internet (eth0) to eth1 which will be connected to another device later. – Bob Mar 27 '16 at 13:42

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