[Fedora-xen] FYI: vnc console now only accessible on 127.0.0.1 by default

[Daniel P. Berrange]

Just a heads-up for anyone who uses the VNC service for accessing the 
graphical framebuffer for fully-virt & para-virt guests. As of xen-3.0.2-43
in rawhide, the VNC server will default to only accepting connections on 
localhost (127.0.0.1). The reason for this change is that the VNC servers 
do not currently[1] have any support for VNC password authentication, so 
listening on 0.0.0.0 by default is rather a bad idea.

If you need to revert to old behaviour either set vnclisten="0.0.0.0" in
the guest domain's config, or to change it system wide, set the vnc-listen
parameter in /etc/xen/xend-config.sxp. I'd recommend though to just forward
the VNC port securely over SSH instead if feasible.

Regards,
Dan.

[1] Password support is under active development & will hopefully also
    appear real soon now...
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