Re: ipv6 only host - problems (5.2-current)

> Date: Thu, 18 Dec 2003 19:11:02 +0000
> From: David Malone <dwmalone_at_maths.tcd.ie>
> Sender: owner-freebsd-current_at_freebsd.org
> 
> On Thu, Dec 18, 2003 at 06:12:14PM +0100, Eugene wrote:
> > i dont want an ip dual-stack, i want an ipv6-only ip stack...
> 
> The KAME stack, as it exists in FreeBSD, requires INET support for
> INET6 to work. I don't know if there has been work in KAME to change
> this.
> 
> It is certainly possible to have FreeBSD runnign without IPv4 being
> configured. For example, I have a router where IPv4 is only configured
> on the loopback interface. I noticed that things like ntpd can still
> recieve IPv4 multicast/broadcast packets even if you don't have
> IPv4 explicitly configured on an interface. I use ipfw to stop any
> broadcast/multicast traffic from getting in.
> 
> 	David.
> 
> # ipfw show
> 00100      0        0 allow ip from any to any via lo0
> 00200      0        0 deny ip from any to 127.0.0.0/8
> 00300      0        0 deny ip from 127.0.0.0/8 to any
> 00400 170247 28972437 deny ip from any to any
> 65535      0        0 allow ip from any to any

As far as I recall, the RFC for IPv6 mandates support for (though not
use of) IPv4.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman_at_es.net			Phone: +1 510 486-8634