Quoting Brian Buhrow 30/09/2011 17:08,
Hello. Yes, my assumption in that mail was that you're running NetBSD as your dom0 and that NetBSD was acting as a router/firewall for the subnet which exists entirely inside the virtual space. I guess you could do the same thing with Linux, but I'm not familiar enough with the networking tools in Linux to say whether it's reliable or easy to manage. I prefer pf in NetBSD, but ipfw or pf in NetBSD should work well and give you months and maybe even years of reliable service.
Ok Brian, with a NetBSD dom0 there wouldn't be any issue. I could run ipfilter/ipnat or pf from the host or with a guest, the route outside the subnet would probably work in that case.
But I'm using a Linux dom0 for various reasons, I don't really have a choice, which brings that dom0/domU, namely linux/netbsd network issue I'm experiencing.
Thanks