IPv4 to IPv6

Jon Radel jon at radel.com
Fri Jun 2 16:44:08 UTC 2017

On 6/2/17 10:26, James B. Byrne via freebsd-questions wrote:
> We are beginning the process of transitioning to IPv6.  I have read a
> great deal respecting the difficulty of moving from IPv4 to IPv6 and
> maintaining general Internet connectivity.  If any reading this have
> gone through the process upon which we are embarking then I would be
> grateful if you share your experience. Particularly any 'gotchas' that
> cropped up.
> We will be using FreeBSD-11 as the platform for our Internet
> connectivity. The main services we provide publicly are SMTP and DNS. 
> We will maintain IPv4 addresses for these together with IPv6.
Do you really plan to remove IPv4 from everything other than your SMTP
and DNS servers?  If so, how will your users [assuming you have such]
reach resources on the IPv4 Internet?  Or have I misunderstood?

An orderly migration to being dual-stacked on everything would probably
be a lot less painful than what I think you're planning.  While there
are possible mechanisms for an IPv6-only client to reach resources on
the IPv4 Internet, I'm unclear on the benefits of bothering with such an

--Jon Radel
jon at radel.com

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