[SOLVED] - Virtualbox on a Dedibox. Unable to set up bridged networking for guests

**HTO** · June 22, 2018, 1:26pm

Hello,

I have issues setting up bridged networking on a FreeBSD host with a FreeBSD guest, on a Dedibox.
So far I haven’t succeeded communicating with the guest, though I now that it’s running and can see what it displays with VNC.

The host setup is as follows:

FreeBSD 11.1
VirtualBox 5.2.12_1 (no x11)
network card: igb0
ip : x.x.27.43
gw: x.x.27.1
all the configuration described at https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/virtualization-host-virtualbox.html
vm set up with --nictype1 virtio --nic1 bridged --bridgeadapter1 igb0 --macaddress1 yyyyyyyyyyyyyy
I use the network card directly (igb0) and the virtual MAC address associated with the guest failover IP address

The guest setup is as follows:

FreeBSD 11.1
network card: vtnet0
ip : x.x.37.63 (an “IP failover address” pointing to my host server)
gw: 62.210.0.1 (a completely different gateway that Online is telling me to use with VMs)

What am I missing?
Do I need to put some routing info to direct the IP traffic to my VM failover IP / virtual MAC addresses?
Do I need to use a bridge+tap device like I did a few years back?

Best regards,

**bene** · June 18, 2018, 8:05am

Hi,

Have you generated a virtual MAC for your VM in the control panel?
Maybe this can help you to configure the network on your VM: https://www.geeklan.co.uk/?p=2109

Benedikt

**HTO** · June 18, 2018, 11:58pm

Yes I did and associated it with the failover IP address pointing to my host.

Thank you for the link. I followed the guidelines there, but unfortunately it’s still not working.

More details [https://forums.virtualbox.org/viewtopic.php?f=40&t=88353&p=423647#p423647](on the Virtualbox forums)

**anon38568649** · June 20, 2018, 11:11am

Hello,

have you properly added the static route for the Gateway?
As the gateway is outside of the subnet of your Failover IP (which is a /32, so a single IP), you need to force the route to the gateway with a static route, otherwise it won’t work.

It’s explained in @bene’s link.

If you already did it, could you show us your routing table?
If you have access through VNC, can you PING something (or MTR) from the VM?

**HTO** · June 20, 2018, 9:24pm

Everything was fine inside the guest, but I had an error in the host which prevented traffic to reach the guest.

I tried to set up the virtual MAC address on the network tap I used, instead of letting VirtualBox handle it.
When I removed the corresponding line (ifconfig_tap0=“ether 00:50:56:01:69:98”), everything started to work…

For reference, my full config is documented on the VirtualBox forum,.

**HTO** · June 20, 2018, 9:26pm

Anyway, thanks to both of you for your help, and the link you provided which set me on the right path!

You rock, guys!