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Date:      7 Aug 2014 08:53:45 -0400
From:      "John R. Levine" <johnl@iecc.com>
To:        "David Benfell" <benfell@parts-unknown.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: he.net IPv6 tunnel
Message-ID:  <alpine.BSF.2.11.1408070849320.22078@joyce.lan>
In-Reply-To: <20140807052054.GA1791@home.parts-unknown.org>
References:  <20140804105020.GD94656@home.parts-unknown.org> <20140806231738.13354.qmail@joyce.lan> <20140807041023.GA1656@home.parts-unknown.org> <alpine.BSF.2.11.1408070032050.14519@joyce.lan> <20140807052054.GA1791@home.parts-unknown.org>

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>> If you don't want to route the v6 addresses on your LAN, put them on the
>> loopback lo0 rather than a real interface.
>
> I think I do want them on a real interface. They need to be
> addressable from the outside world. Am I misunderstanding aliasing?

The traffic comes in via the tunnel, not via your LAN, so there's no point 
in putting them on a LAN interface.

> Can I use the configuration bits you had for bce0 on my em0? And if I
> do, is there a way to set it up so I'm only being nice to that
> wireless router rather than the whole Big Bad Internet?

Yes, it's just a different kind of Internet.

> gif0: flags=8011<UP,POINTOPOINT,MULTICAST> metric 0 mtu 1280
>        inet6 fe80::4639:c4ff:fe3a:d7ea%gif0 prefixlen 64 scopeid 0x3
>        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>
> No endpoints are listed for gif0 and while I can ping my original IPv6
> address and its aliases....

This says there's a bug and suggests a workaround:

https://forums.freebsd.org/viewtopic.php?f=4&t=44747




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