On Tue, May 14, 2013 at 3:13 PM, Stuart Henderson <s...@spacehopper.org> wrote: > On 2013-05-14, Mattias Lindgren <mlindg...@runelind.net> wrote: >> Hello, >> >> I'm using a OpenBSD 5.3 (release) machine as my router connecting >> to Comcast. Comcast provides native IPv6 access, however it does >> so a little bit differently than what is probably best practice. >> I use wide-dhcpv6-20080615p2 from ports to get an address on my >> outside interface, as well as a prefix which gets assigned to my >> inside interface. However, the default route is announced via Route >> Advertisements. > > That is pretty common practice for ISPs doing IPv6 (see RFC 6204), > but OpenBSD doesn't support it at present.
I tried to use the DHCPv6 client but found it didn't quite work right (no assigned IP to the interface). Rtsold gets the prefix and gateway just fine, but Comcast assigns a /64 prefix to my firewall. But, the DHCPv6 server won't actually issue me a V6 IP (as of yet..) I've assigned an arbitrary IPv6 address to my firewall, and it can reach out over Comcast's network with no problem. I started to look at setting up an internal local network before getting distracted by paying work. >> However since I would also like for my router to forward >> IPv6 packets, I'm not sure of how to make it work. Rtsol states that >> net.inet6.ip6.forwarding=0. I've tried running rtsol with forwarding >> set to 1, but it complains and does not grab a default route. The other >> option would be to manually set the v6 default route, but I'd prefer to >> not have to do that. Does anyone know of a workaround for this issue? > > Manually setting the route is the only current workaround afaik. I might give that a shot. The RA (at least the one near me) gives a link local advert (fe80::) with a /64 prefix. > > FreeBSD turned accept_rtadv into a per-interface flag which can be > set (only) on the "upstream" interface so you can continue to send > adv's on the "downstream" interfaces. That seems to be a good solution, but not necessarily the "right" one.
