ipv6 only host - problems (5.2-current)

[David Malone]

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