Comments on: Using host networking and NAT with VirtualBox http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/ When the going gets tough, the tough sniff packets. Fri, 03 Feb 2012 05:29:18 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Tyler Wagner http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-1097 Tyler Wagner Wed, 16 Nov 2011 08:29:39 +0000 http://www.tolaris.com/?p=237#comment-1097 That all looks normal. brctl shows the bridge exists, but the way that Virtualbox works, it won't show up as an interface on it. Perhaps rebuild the vboxnet driver? /etc/init.d/vboxdrv setup If you sniff on vnet0 with tshark/tcpdump, do you see any traffic at all? What about while pinging? That all looks normal. brctl shows the bridge exists, but the way that Virtualbox works, it won’t show up as an interface on it.

Perhaps rebuild the vboxnet driver?

/etc/init.d/vboxdrv setup

If you sniff on vnet0 with tshark/tcpdump, do you see any traffic at all? What about while pinging?

]]> By: dg http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-1093 dg Tue, 15 Nov 2011 18:54:20 +0000 http://www.tolaris.com/?p=237#comment-1093 brctl show gives: bridge name bridge id STP enabled interfaces vnet0 8000.000000000000 no net.ipv4.ip_forward = 1 is still set unable to ping guest from host or host from guest. brctl show gives:

bridge name bridge id STP enabled interfaces
vnet0 8000.000000000000 no

net.ipv4.ip_forward = 1 is still set

unable to ping guest from host or host from guest.

]]> By: Tyler Wagner http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-1091 Tyler Wagner Tue, 15 Nov 2011 17:05:01 +0000 http://www.tolaris.com/?p=237#comment-1091 Hi dg, I'm not aware of any issues with 11.10, but I haven't used it myself. Does brctl show that the bridge exists and works? Can you ping from the host to the VM? Is net.ipv4.ip_forward still set to 1 in /etc/sysctl.conf or in the active kernel? sysctl -a | grep ip_forward Hi dg,

I’m not aware of any issues with 11.10, but I haven’t used it myself. Does brctl show that the bridge exists and works? Can you ping from the host to the VM? Is net.ipv4.ip_forward still set to 1 in /etc/sysctl.conf or in the active kernel?

sysctl -a | grep ip_forward

]]> By: dg http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-1090 dg Tue, 15 Nov 2011 15:18:57 +0000 http://www.tolaris.com/?p=237#comment-1090 this solution has been rock solid for a good while. However, after upgrading to Ubuntu 11.10 x64, using the vnet0 bridge adapter will no longer allow my client VMs to see the internet. Anyone else seeing this? this solution has been rock solid for a good while. However, after upgrading to Ubuntu 11.10 x64, using the vnet0 bridge adapter will no longer allow my client VMs to see the internet. Anyone else seeing this?

]]> By: Tyler Wagner http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-447 Tyler Wagner Fri, 13 May 2011 05:24:35 +0000 http://www.tolaris.com/?p=237#comment-447 Yes, that's correct. This tutorial is still valid up to Virtualbox 4.0.6, although the GUI has changed a little since it was written. Yes, that’s correct. This tutorial is still valid up to Virtualbox 4.0.6, although the GUI has changed a little since it was written.

]]> By: dash http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-443 dash Thu, 12 May 2011 21:50:04 +0000 http://www.tolaris.com/?p=237#comment-443 SO, just to be clear: With Virtualbox 4.0.2 should I use Adapter1->Bridged Adapter->vnet0? Will be the result the same as in your tutorial? Am I misunderstanding something?? SO, just to be clear:

With Virtualbox 4.0.2 should I use Adapter1->Bridged Adapter->vnet0?

Will be the result the same as in your tutorial?

Am I misunderstanding something??

]]> By: dash http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-384 dash Sun, 06 Mar 2011 19:02:35 +0000 http://www.tolaris.com/?p=237#comment-384 Thank you very much ;-) Thank you very much ;-)

]]> By: Tyler Wagner http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-383 Tyler Wagner Sun, 06 Mar 2011 10:06:55 +0000 http://www.tolaris.com/?p=237#comment-383 No physical interfaces are connected to bridge vnet0. That's the idea. Instead, the VMs are connected to it, and the host OS routes the traffic (via whatever physical interface is in use at the time), while performing NAT. No physical interfaces are connected to bridge vnet0. That’s the idea. Instead, the VMs are connected to it, and the host OS routes the traffic (via whatever physical interface is in use at the time), while performing NAT.

]]> By: dash http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-382 dash Sat, 05 Mar 2011 10:12:17 +0000 http://www.tolaris.com/?p=237#comment-382 Can you explain me what interfaces bridges the new vnet0 interface? However, I know what a bridge is, I'm confused :S Can you explain me what interfaces bridges the new vnet0 interface?

However, I know what a bridge is, I’m confused :S

]]> By: harbran http://www.tolaris.com/2009/03/05/using-host-networking-and-nat-with-virtualbox/comment-page-1/#comment-380 harbran Tue, 22 Feb 2011 22:33:32 +0000 http://www.tolaris.com/?p=237#comment-380 I used this guide to install a bridget network on my laptop (host: ubuntu 10.10, guest: debian squeeze) with VirtualBox 4.0.4. Worked right away - I just had to restart after defining the masquerading, I used this guide to install a bridget network on my laptop (host: ubuntu 10.10, guest: debian squeeze) with VirtualBox 4.0.4.
Worked right away – I just had to restart after defining the masquerading,

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