[v6ops] Re: Dynamic addresses

[George Michaelson <[e-mail]>]

Surely before arguing for constant renumbering you should explain
remediation for the downsides of constant renumbering?

I suspect they involve stable addressed third parties. You would know that
there are many people who reject use of 3 way handshake rendezvous e.g. in
NAT traversal.

If they involve use of the DNS then they also construct dependency on name
to address mapping stability, cost money and have security issues around
TSIG and cryptography at scale as well as update and propagation delay.

Normally I find I agree easily with what you say. I think you are hand
waving consequences on your own experience with stable addresses as a norm.
If you have active solutions and live behind a dynamically addressed sub
prefix of some other delegate it would be useful to share how you make
inbound ssh work reliably.

(I have used an ssh reverse tunnel maintained by a daemon to overcome this
problem. It demands owning a stable endpoint outside the changing prefix
boundary on a globally routable. Presumably you could do this
probabilistically on dynamic ips which don't frequently change at some risk
of synchronised change wrecking it)

George

On Wed, 14 Aug 2024, 7:39 pm Gert Doering, <[e-mail]> wrote:

> Hi,
>
> On Wed, Aug 14, 2024 at 04:11:27AM +0530, Daryll Swer wrote:
> > I'm not sure what you're proposing, Marco. But my stance on the matter is
> > simple: Get rid of dynamic prefixes in IPv6 production.
>
> There some good arguments for dynamic prefixes, namely, people should stop
> putting explicit IPv6 addresses into places (which will inevitably cause
> headaches when changing ISP).  So actually having better support for
> automatic DNS registration/discovery (mDNS and friends) and just making
> SoHo networks renumber automatically and properly is a worthwile goal.
>
> I do agree that those 0.001% of people that SSH into their home servers
> will hate SSHs dying on a renumbering event...
>
> Gert Doering
>         -- NetMaster
> --
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