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Re: [Xen-users] Secure VLANs

To: Javier Guerra Giraldez <javier@xxxxxxxxxxx>
Subject: Re: [Xen-users] Secure VLANs
From: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>
Date: Wed, 05 Jan 2011 21:49:39 +0000
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On 05/01/11 21:40, Javier Guerra Giraldez wrote:
On Tue, Jan 4, 2011 at 5:58 AM, Jonathan Tripathy<jonnyt@xxxxxxxxxxx>  wrote:
Can someone please give me some tips on how to set up a Xen system with
VLANs in such a way that VLAN hopping by DomUs isn't possible?

I have tagged frames coming from my switch into my Dom0.
set a soft bridge for each VLAN on Dom0 and add each DomU interface to
only the respective bridge.

Don't present the physical interface to the DomUs

I had this method in my head however I wasn't sure if it is "secure". Using the above simple method, is there *no way* that a customer could "VLAN Hop" by double tagging or anything else?

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