Ubuntu 9.10 x64 & VirtualBox 3.1.6 - Internal Network does not work

[Henrik23]

I tried to configure an internal Network between a Win2k3 Server guest and a WinXP64 guest. I did it via GUI and via "VBoxManage modifyvm <client> --nic1 intnet" but the vms does not "see" each other.

[Frank Mehnert]

Did you assign a static IP to each VM? Because if you use the internal network, there is no DHCP server by default.

[Henrik23]

Win2k3 guest is DHCP Server

[Frank Mehnert]

In that case, please attach the VBox.log files of both VMs to this ticket.

[Henrik23]

Where do I find these logs?

[Frank Mehnert]

This configuration looks correct and it should work from what I can say. Are you sure that each VM finds the two network interfaces? I saw that you configured two E1000 network cards for the XP64 session, so you installed the proper guest drivers, right?

[Henrik23]

I installed the drivers and both machines find two network interfaces. And the Server makes DHCP on the IntNet interface.

[Frank Mehnert]

So what happens if you assign static IPs to the intnet interfaces of both VMs?

[Henrik23]

No connection, too. Ping does not work.

[Frank Mehnert]

But you are aware that ICMP is blocked by the Windows firewall by default, right?

[Henrik23]

No, I was not aware. It does work. But if VirtualBox acts like a switch, why does DHCP not work???

[Henrik23]

Forget this "Bug". Windows standard firewall settings have made me so much trouble. I have disabled the firewall in both machines at the "IntNet" interface and everything works fine now: DHCP works, ping works and the domain works, too. Thank you for the hint to the windows firewall I have not thought that microsoft is so stupid...

[Frank Mehnert]

Thanks for the feedback.