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Date:      Mon, 12 Jun 2017 13:19:12 +0200
From:      Tijl Coosemans <tijl@FreeBSD.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        freebsd-net@FreeBSD.org
Subject:   Re: Enable IPv6 Privacy Extensions by default
Message-ID:  <20170612131912.42537b13@kalimero.tijl.coosemans.org>
In-Reply-To: <D05BDD5A-F7ED-4DFE-8835-DE444A12C771@lists.zabbadoz.net>
References:  <20170611215904.4612ee41@kalimero.tijl.coosemans.org> <D05BDD5A-F7ED-4DFE-8835-DE444A12C771@lists.zabbadoz.net>

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On Sun, 11 Jun 2017 22:13:14 +0000 "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> wrote:
> On 11 Jun 2017, at 19:59, Tijl Coosemans wrote:
>> 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.

Ah, thanks.  I see that RFC 4941 also recommends it be disabled by
default.



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