Ipv6 / DNS questions

Matthew Seaman matthew at FreeBSD.org
Fri Jun 2 11:38:14 UTC 2017


On 2017/06/02 12:30, Gary Palmer wrote:
>> Assuming that you always get the same /64 assigned to your gateway, then
>> the address SLAAC assigns to your server will be constant so long as
>> you're on the same hardware, since the SLAAC address is generated from
>> the network prefix and the MAC address of the NIC.  In that case, it
>> often suffices to update the DNS manually.

> Only if
> 
> ipv6_privacy="YES"
> 
> is not set.

Ah, but ipv6_privacy is intended for use on personal laptops and other
devices where you'ld prefer not to have your MAC address available as a
tracking cookie when acting as a web client.

It's not intended for use on a web server.  Even if you do turn it on
IIRC the effect is to add alias IPs on that network interface, alongside
the standard address that SLAAC would generate anyhow.

	Cheers,

	Matthew


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