Re: [Xen-devel] protecting xen startup

[Jan Kundrát <jan.kundrat@xxxxxx>]

Luke Kenneth Casson Leighton wrote:
>  
>  perhaps i should explain: i am looking to use xen to implement
>  a new level of paranoid security.
>  
>  i aim to run single applications, such as firefox and
>  openoffice, in their own dedicated virtual machines, a
>  localised file server in one (or more if i can get GFS or OCFS2
>  to work) virtual machine(s), and for the applications to each
>  connect to the xen master running an x-server [nomachine isn't
>  quite suitable, i may have to write my own ssh-based x-proxy].
Do you mean running xserver in domain0? You should better setup separate 
domain for it.
But are you sure that such a setup will be usable and fast enough? I'm 
definitely interested in results, anyway.
>  allowing a compromised guest OS to fire up another virtual
>  machine, connect to the x-server and spoof "please enter your
>  password" dialog boxes is therefore to be avoided!!!
If I'm not mistaken, you can start up new VMs only from domain0 or 
through HTTP interface, So you can easily firewall all traffic inside 
domain0 to local port 8000 (except for 127.0.0.1/32).
j.



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