Re: [Qemu-devel] [PATCH 4/4] Add support for -net bridge

[Avi Kivity]

On 11/08/2009 12:11 AM, Anthony Liguori wrote:
> >  You don't need root privileges to use a tap device.
>
> You can access a preconfigured tap device but you cannot allocate a 
> tap device and connect it to a bridge without CAP_NET_ADMIN.

btw, shouldn't we, in the general case, create a bridge per user and use 
IP NAT?  If we have a global bridge, users can spoof each other's MAC 
addresses and interfere with their virtual machines.  They can also 
interfere with the real network.

That's not a concern with most one-user-per-machine configurations, but 
the default configuration should be safe.


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