Re: [Qemu-discuss] qemu security

[Jakob Bohm]

On 6/11/2013 11:44 AM, Wolfgang Hennerbichler wrote:
> hi,
>
> I've updated from qemu 1.0 to qemu 1.4. One of my VM's used to bridge
> traffic (within the VM) between two interfaces. This stopped working in
> the new Qemu-Version. It seems as if qemu is blocking traffic as soon as
> it sees mac adresses floating on interfaces it wouldn't expect.
Did you by any chance upgrade the host computers kernel too?

Are there any bridge or other packet related messages in the Host and Guest
syslogs?

Are you allowing libvirt to mess up the network configuration on your host
computer?

One of those could also be related to the problem.

> I don't have any special network-filters in my libvirt-config:
>
>      <interface type='bridge'>
>        <mac address='52:54:00:85:c8:5f'/>
>        <source bridge='br0'/>
>        <model type='pcnet'/>
>        <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
>      </interface>
>      <interface type='bridge'>
>        <mac address='52:54:00:42:e7:5d'/>
>        <source bridge='br107'/>
>        <model type='pcnet'/>
>        <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
>      </interface>
>
> Any help or hints would really be appreciated. Did some default change?
> I have a hard time googling...

Enjoy

Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S.  http://www.wisemo.com
Transformervej 29, 2730 Herlev, Denmark.  Direct +45 31 13 16 10
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