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Re: [libvirt] [PATCH 13/17] qemu.conf: remove vnc_auto_unix_socket



On Thu, May 05, 2016 at 05:41:45PM +0100, Daniel P. Berrange wrote:
> On Thu, May 05, 2016 at 12:39:24PM -0400, Cole Robinson wrote:
> > On 05/05/2016 12:20 PM, Pavel Hrdina wrote:
> > > This config option is broken, it will generate unix socket even if
> > > attribute 'listen' or listen element is specified.
> > > 
> > > Also following commit will makes this option obsolete.
> > > 
> > > Signed-off-by: Pavel Hrdina <phrdina redhat com>
> > 
> > IMO this is not acceptable. For one, there's no precedent for removing a
> > qemu.conf option; IMO it's part of our API.
> > 
> > But the reason this option exists is so site admins can make listen
> > type=socket/socket= the graphical default, as opposed to a wide open
> > listen=127.0.0.1 that any user on the host can trivially access. VNC passwords
> > are known insecure, so locking down the listening mechanism is really the only
> > (current) way to secure VNC.
> 
> ...TLS with x509 certs and/or SASL is an alternative current secure
> VNC mechanism.
> 
> I agree though its desirable to have a global way to make VNC listen
> UNIX sockets instead of localhost

I was afraid that someone would object to this patch :) but it worth the try.
Anyway, I'll redo this so the option is still there and in that case I'll also
add similar option for Spice.

Pavel


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