recommended VNC settings?

[david l goodrich <dlg%dsrw.org@localhost>]

I'm trying to set up a domU on a NetBSD 6.1.2 dom0, running Xen
4.1.6.1 from pkgsrc.  the domu appears to start, but attempts to
connect via VNC immediately disconnect.  does anyone have
recommendations for VNC settings in the domu config?  Barring
that, does anyone have a functioning config i can just copy?
<grin>

thanks,
--david