FreeBSD 12, pf, and Dual IP stack?

[Rodney W. Grimes]

> Hello,
> 
> So your setup looks like mine except I only have one ipv4 and one ipv6
> interface, how do I alias the ipv6 address space I have? I don't know
> how to hex split.
> 
> Thanks.
> Dave.
> 
> 
> On 6/5/19, Kurt Jaeger <pi at freebsd.org> wrote:
> > Hi!
> >
> >> Yes, an ifconfig on my vtnet0 interface does show the ipv6 address and
> >> it has prefixlen 64 I'm assuming that's what your refering to? Can you
> >> clarify your meaning about ipv6 aliases?
> >
> > Here's one of my systems, with two IPv6 addresses, so it has an two
> > IPv6 and two IPv4 addresses:
> >
> > igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> >
> > options=e527bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
> >         ether 0c:9d:92:85:0f:7a
> >         inet 193.105.105.132 netmask 0xffffffc0 broadcast 193.105.105.191
> >         inet 193.105.105.133 netmask 0xffffffff broadcast 193.105.105.133
> >         inet6 fe80::e9d:92ff:fe85:f7a%igb0 prefixlen 64 scopeid 0x1
> >         inet6 2001:14f8:200:4::4 prefixlen 64
> >         inet6 2001:14f8:200:4::5 prefixlen 64

I am not sure if this well help you to understand the IPv6 range
of addresses, but the two above short form numbers are in long form:
2001:14f8:0200:0004:  0000:0000:0000:0004
2001:14f8:0200:0004:  0000:0000:0000:0005

I have inserted the space to show you the break at "prefixlen 64, aka /64".
You actaully have the lower 64 bits to play with other than the 2 that
have been setup, one being your IP address, and the other being your default
router on this segment.

> >         media: Ethernet autoselect (1000baseT <full-duplex>)
> >         status: active
> >         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> >
> > --
> > pi at opsec.eu            +49 171 3101372                    One year to go !

-- 
Rod Grimes                                                 rgrimes at freebsd.org