FreeBSD ipv6 rc.conf settings issue

Gary Kline kline at
Sun Jan 10 21:45:25 UTC 2010

On Sat, Jan 09, 2010 at 10:56:31AM +0000, Matthew Seaman wrote:
> Gary Kline wrote:
> >This caught my interest this morning so I set up a commented-out trial in
> >/etc/rc.d for my ipv6 entry; the one I had in my database /etc/namedb/* 
> >files
> >blew my connection sky-high recently.
> >
> >Does this seem plausible:
> >
> >
> >#
> >## ipv6 config
> >#
> >
> ># ipv6_enable="YES"
> ># ipv6_defaultrouter="2002:d1b4:d5d2::"
> ># ipv6_default_interface="em0"
> ># ipv6_gateway_enable="YES"
> >
> >given that my Adress record is ?
> >
> >tia, gents,
> So you're using 6to4 tunnelling as described in stf(4)?  That's a quite
> different setup to what has been discussed previously in this thread. 
> I think 6to4 is, if not deprecated, certainly not the normal way of getting
> IPv6 connectivity nowadays.  Generally you'ld get an address space 
> allocation
> from your ISP, or failing that, a tunnel broker like Hurricane Electric[*].
> Anyhow, as stf(4) says, you need to encode your IPv4 address as hex in the
> 6to4 address -- that looks correct:
> % perl -e 'map { printf "%x\n", $_ } split( /\./, shift );'
> d1
> b4
> d5
> d2
> However 2002:d1b4:d5d2:: is *your* network address, and having it as the 
> default router sounds wrong to me.  You need to assign addresses from that
> range to your hosts -- which you can do automatically by enabling rtadvd(8)
> on your gateway machine and rtsold(8) on your clients.  Also, to use 6to4
> you need to create a 'stf0' interface and make that the 
> ipv6_default_interface.

	Errp!  Matthew, you lost me entirely.  I *do* want to use IPv6
	eventually.  I have it sent up, latenly, in my mail and DNS files.
	I do understand the need to go to v6 in a few years, but it is
	probably going to take me that long to get mi mind around the
	workings of the whole set of issues.  [[I'm learning new+exciting
	things about pfSEnse and networking-in-detail while getting X11
	running on my new server....]]  Are there any IPv6-for-Dummies
	around?  The man pages are things you read for reference; or at
	least that's been my experience!

> This is all independent of setting up IPv6 related items in your DNS.  Get
> the IPv6 connectivity working first -- use ping6 and traceroute6 with IPv6
> numbers to confirm connectivity, and then worry about DNS settings.

	I'll google around for some insights of things-v6; but you may know
	what's best.



> 	Cheers,
> 	Matthew
> [*] Which is pretty crazy given that the prediction is IPv4 space is
> going to run out around 2012[+].  All of the major ISPs and NSPs really
> should be providing IPv6 natively by now.
> [+] Potential for another IT-feeding-frenzy-panic scenario like the run
> up to Y2K.  Make sure IPv6 is on your CV...
> -- 
> Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
>                                                  Flat 3
> PGP:     Ramsgate
>                                                  Kent, CT11 9PW

 Gary Kline  kline at  Public Service Unix

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