virtualbox.org

Greetings,

I am new in configuring Virtual Machines, and I have a problem in routing between two virtual machines.

Here is my system :
Host : Windows 7 64-bit
VB version : 4.2.12
All of my 3 guests : Ubuntu 12.04

My VM configuration is as the following :
VM1 - As a Host 1
Adapter 1 : NAT
Adapter 2 : Host-Only, the IP address is 192.168.56.101

VM2 - As a Router
Adapter 1 : NAT
Adapter 2 : Host-Only, the IP address is 192.168.56.102
Adapter 3 : Host-Only, the IP address is 192.168.194.101

VM3 - As a Host 2
Adapter 1 : NAT
Adapter 2 : Host-Only, the IP address is 192.168.194.102

I want it to make it like this : VM1 <---> VM2 <---> VM3.
But the ping result that I got :
from VM1 to VM2 : Success
from VM1 to VM3 : Failed!
from VM2 to VM1 : Success
from VM2 to VM3 : Success
from VM3 to VM1 : Failed!
from VM3 to VM2 : Success

It seems like the VM2 does not work as a router, it can connect to each host, but i can not make the hosts connected with each other. Can someone please help me?
Thank you.

Well if you can connect to the router machine, it means Virtualbox is working properly.. anything like routing and the sort should be asked on a networking forum, as this is way out of scope of this forum.
Most likely : the NAT interface interfers with your routing table -- you're missing the routes -- firewall is blocking -- routing is not enable in your router VM (not enabled by default)

noteirak wrote:Well if you can connect to the router machine, it means Virtualbox is working properly.. anything like routing and the sort should be asked on a networking forum, as this is way out of scope of this forum.
Most likely : the NAT interface interfers with your routing table -- you're missing the routes -- firewall is blocking -- routing is not enable in your router VM (not enabled by default)

I tried disabling NAT, the result is even the Host 1 can not ping the Router, it said "unreachable".
How to enable routing in my router VM?

Thanks

I am afraid I must insist :

noteirak wrote:anything like routing and the sort should be asked on a networking forum, as this is way out of scope of this forum.