Date: Sun, 16 Dec 2012 20:47:29 +0100 From: =?utf-8?Q?Fr=C3=A9d=C3=A9ric_Perrin?= <frederic.perrin@resel.fr> To: freebsd-questions@freebsd.org Subject: Re: IPv6in4 tunnel with only one /64 prefix Message-ID: <86sj75g4oe.fsf@antre.fperrin.net> In-Reply-To: <86bof9yuqt.fsf@antre.fperrin.net> (=?utf-8?B?IkZyw6lkw6ly?= =?utf-8?B?aWM=?= Perrin"'s message of "Wed, 07 Nov 2012 22:21:30 %2B0100") References: <86bof9yuqt.fsf@antre.fperrin.net>
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Following-up on myself... Of course Steve's suggestion was not what I wanted to hear, as I wanted to do stuff myself :) The take-away is that my plan works. I have a full write up in French at <http://tar-jx.bz/notes/tunnels-ipv6.html>; ; I can translate into English if people are interested. Basically, you need to tell the external interface that it is not in a /64 addres, then you can add the routes you need. There is nothing special to do on the router at the other end of the tunnel, except turning on the DHCPv6 server. I did have to setup an NDP proxy, the (quite trivial) code is at <https://gitweb.fperrin.net/?p=3Dndp6.git>. I did hit a bug in ISC dhclient. There is a fix in the Debian bug tracker <http://bugs.debian.org/684009>; (a similar fix in Network Manager for desktop systems already made itinto their git). Le mercredi 7 =C3=A0 22:21, Fr=C3=A9d=C3=A9ric Perrin a =C3=A9crit : > Hello list, > > I have a FreeBSD server with native IPv6 connectivity. At home, my ISP > provides me with only IPv4 connectivity. In order to get IPv6 to the > home, I had the idea of creating a 6in4 tunnel between my home gateway > and my FreeBSD server. The part about creating the tunnel, routing > between the home and the server works using private addresses (fc00::/8 > over gif0). > > However, I only have one global /64 on the FreeBSD box. What can I do? > > I have the idea of subnetting the /64 into e.g. /80, route a couple of > /80s through gif to the home and use another /80 for the FreeBSD server. > However, as the router into which my FreeBSD server is connected will > expect the entire /64 to be directly connected, I will have to setup > some kind of NDP proxy for the /80 to the home. I will also lose > autoconf, but I can live with that. > > Comments, either on the plan above, or something else I haven't thought > of? --=20 Fred
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