Linux: Ip forwarding or bridge?

Question

On a Ubuntu 8.04 I have two interfaces eth3 and eth4:avahi.

eth3 is in my local network with 192.168.178.63.
eth4:avahi has the ip 85.214.144.211.

From this box I can ping 85.214.144.212 successfully.

On a windows box in the same local network with ip 192.168.178.61 I want also be able to reach 85.214.144.212. To achieve this I used the following steps:

On the windows machine I entered 192.168.178.63 as gateway.
On the Ubuntu I activated /proc/sys/net/ipv4/ip_forwarding

Now on the windows machine I can ping 85.214.144.211 but not ping 85.214.144.212.

What I am doing wrong?

score 1 · Accepted Answer · answered Aug 01 '11 at 09:05

1

Reason: 85.214.144.212 don't know route to 192.168.178.0/24 network.
1. Add route to 192.168.178.0/24 network on 85.214.144.212-box.
2. Use NAT on Ubuntu_8.04.

answered Aug 01 '11 at 09:05

azghash

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Thanks. How do you do 1. and 2.? Especially as the 212-box is a OpenVZ-guest on the 211-host – user4514 Aug 01 '11 at 09:15
What is the default gateway of the 212 box? – Paul Aug 01 '11 at 13:02

score 0 · Answer 2 · answered Aug 01 '11 at 14:36

0

I don't know what an OpenVZ-guest is, but if it is a host on the Internet then you will have to use network address translation (NAT) on your Ubuntu host because 192.168.x.y addresses are not routable beyond your local network.

answered Aug 01 '11 at 14:36

blankabout

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Linux: Ip forwarding or bridge?

2 Answers2