Re: ipfilter strange startup message on FreeBSD 5.3

In some email I received from dave, sie wrote:
[ Charset ISO-8859-1 unsupported, converting... ]
> Hello,
> I've got a pair of FreeBSD machines both running freebsd 5.3-RELEASE and
> ipfilter. Both boxes are loading ipfilter via a loadable kernel module from
> rc.conf:
>
> ipfilter_enable="YES"
> ipfilter_rules="/etc/ipf.rules"
> ipfilter_flags=""
>
> On one box ipfilter starts without giving this error message, the second one
> does:
>
> "ioctl(SIOCIPFL6): invalid argument"
>
> I thought this had something to do with the fact that the second machine was
> not running a kernel with the ipv6 option in it, so i adjusted it but that
> didn't solve the problem. The first machine is running with a kernel
> securelevel of 1 while machine2 is at the default, so i would have expected
> this from box1, other than that machine1 is running ipnat box 2 is not. When
> i log in i have to reload ipfilter on box2 although it says loading ipfilter
> and it is in the kernel the rules are not active. Reloading the rules
> corrects this, but i don't get any ipf syntax errors.Any suggestions
> appreciated.

The kernel doesn't have IPv6 support compiled would be my guess.

Darren