Sign up ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

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

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

From this box I can ping successfully.

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

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

Now on the windows machine I can ping but not ping

What I am doing wrong?

share|improve this question

2 Answers 2

up vote 1 down vote accepted

Reason: don't know route to network.
1. Add route to network on
2. Use NAT on Ubuntu_8.04.

share|improve this answer
Thanks. How do you do 1. and 2.? Especially as the 212-box is a OpenVZ-guest on the 211-host – user4514 Aug 1 '11 at 9:15
What is the default gateway of the 212 box? – Paul Aug 1 '11 at 13:02

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.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.