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IPv6 Unique Local Addresses (was Re: New Active Exploit: memcached on port 11211 UDP & TCP being exploited for reflection attacks)

Not sure if this is the common thought, but if anyone has a network
which requires static IP assignments, they can probably justify a
request for a /48 from an RIR.  After all, ARIN's requirement for an
end-user IPv6 block is, at minimum: "Justify why IPv6 addresses from
an ISP or other LIR are unsuitable". I would think that ISP
portability would satisfy this requirement, but If I'm wrong, I'm
absolutely open to being corrected on this. But most home users have
no need for static IPs, so the dynamic ISP assignment is perfectly

I think the tech will advance fast enough that keeping up with an IPv6
route table will be a non-issue. IPv6 adoption is, unfortunately, slow
enough that there will be no issues keeping up, even assuming a "slow"
hardware refresh cycle.


On Thu, Mar 1, 2018 at 5:48 PM, Mark Andrews <marka at isc.org> wrote:
>> On 2 Mar 2018, at 9:28 am, Owen DeLong <owen at delong.com> wrote:
>>> On Mar 1, 2018, at 1:20 PM, Harald Koch <chk at pobox.com> wrote:
>>> On 1 March 2018 at 15:18, Owen DeLong <owen at delong.com <mailto:owen at delong.com>> wrote:
>>> Second, RFC-1918 doesnâ??t apply to IPv6 at all, and (fortunately) hardly anyone
>>> uses ULA (the IPv6 analogue to RFC-1918).
>>> Wait. What's the objection to ULA? Is it just that NAT is bad, or is there something new?
>> No particular objection, but I donâ??t see the point.
>> What can you do with ULA that GUA isnâ??t suitable for?
>> Owen
> ULA provide stable internal addresses which survive changing ISP
> for the average home user. Now, I know you can do the same thing
> by going to a RIR and getting a prefix but the RIRâ??s arenâ??t setup
> to supply prefixes like that to 10 billion of us.
> They are also in a specific range which makes setting filtering
> rules easier for everyone else.
> Now I would love it if we could support 100 billion routes in the
> DFZ but we arenâ??t anywhere near being able to do that which would
> be a requirement for abandoning ULA.  Until them they have there
> place.
> Mark
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka at isc.org