m.jakeman at lancaster.ac.uk
Fri Apr 24 16:26:08 UTC 2009
Nathan Lay wrote:
> I started playing with IPv6 on my home network with the intent to
> transition over. While many things work quite well, IPv6 technology
> in general still seems to have some rough edges.
> In terms of FreeBSD support, rtadvd and rtsol do not yet support
> (easily? -O option in rtadvd/rtsold) RFC5006 (Router Advertisements
> Option for DNS Configuration) which make it inconvenient to use mobile
> devices (like laptops) on an IPv6 network. I haven't had much luck
> with net/radvd.
What are your problems with using radvd? I have used it quite a bit on
FreeBSD (6.1) without any hassle. It's even written quite nicely in my
experience so working on patches for it should be quite do-able if there
are features missing.
> Is this something that could be improved? I'd be willing to implement
> this support, but I have very little time to spare (writing thesis).
> To be backward compatible with IPv4, I had a look at faith and faithd
> and while these tools are ingenius, I don't think they are good enough
> for transitioning to IPv6. I imagine it is possible to write an
> IPv6->IPv4 NAT daemon that uses faith to capture and restructure
> IPv6/IPv4 packets. Though, it really seems like this is the
> firewall's job
> A pf rule like:
> nat on $inet4_if inet to any from $lan_if:network6 -> ($inet4_if)
> would be extremely convenient. I'm aware pf doesn't support the token
> :network6 ... its just a wishful example. The IPv6 mapped IPv4
> addresses would be the standard ::ffff:0:0/96 prefix. I imagine that
> this is very difficult to implement but I don't see why it wouldn't be
> possible. If a firewall supported this kind of NAT, a home network
> could easily deploy IPv6 and be backward compatible. Well, not quite,
> I guess BIND would have to serve IPv6 mapped IPv4 addresses to IPv6
> Oh yeah, one annoyance on 7-STABLE, it seems like pf is started before
> IPv6 rc.conf options are processed (including IPv6 address assignment)
> breaking inet6 rules that involve $if:network.
> Other than that, this has been one hell of a fun experience.
> Best Regards,
> Nathan Lay
> freebsd-net at freebsd.org mailing list
> To unsubscribe, send any mail to "freebsd-net-unsubscribe at freebsd.org"
More information about the freebsd-net