From owner-freebsd-net@freebsd.org  Sun Jun 11 22:13:32 2017
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From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
To: "Tijl Coosemans" <tijl@FreeBSD.org>
Cc: freebsd-net@FreeBSD.org
Subject: Re: Enable IPv6 Privacy Extensions by default
Date: Sun, 11 Jun 2017 22:13:14 +0000
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On 11 Jun 2017, at 19:59, Tijl Coosemans wrote:

> Hi,
>
> I recently got a new modem/router from my ISP that supports IPv6.  Added
> ifconfig_em0_ipv6="inet6 accept_rtadv" and rtsold_enable="YES" to
> /etc/rc.conf like the handbook says and now all my FreeBSD systems have
> an IPv6 address. \o/
>
> I also added these lines to /etc/sysctl.conf to enable temporary
> addresses:
>
> net.inet6.ip6.use_tempaddr=1
> net.inet6.ip6.prefer_tempaddr=1
>
> Shouldn't these be enabled by default?  There was a proposal 9 years ago
> that didn't get any objections but it seems it wasn't committed:
> https://lists.freebsd.org/pipermail/freebsd-net/2008-June/018381.html
>
> If there are no objections, I'll make the change in a week or so.

Object :)

Check the rc.conf ipv6_privacy option rather than setting the sysctl manually.

/bz