[CentOS-virt] Network isolation for KVM guests

Fri Mar 31 18:18:43 UTC 2017
C. L. Martinez <carlopmart at gmail.com>

On Fri, Mar 31, 2017 at 05:06:53PM +0200, Sven Kieske wrote:
> On 31/03/17 15:55, C. L. Martinez wrote:
> > I need to attach two physical interfaces to a guest and these phy interfaces have IP and routes assigned and I need to get them off the main routing table.
> I do not understand this.
> You can attach a physical (or virtual, doesn't matter), interface to any
> given vm, without assigning routes or IPs to these interfaces directly.

No, I can't because this host doesn't support PCI passthrough. One of these interfaces is a wireless nic.

> Just do the network configuration inside the vm, and the routing, well
> on your router? You will just need the route for the vm networks on your
> host, but what is your attack scenario to keep this separated from other
> routes on this host? you need at least CAP_NET_ADMIN to fiddle with those.

How? If the same host routes Internet traffic in the main routing table I expose host's services to Internet.

> -- 
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> Sven Kieske
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C. L. Martinez