Never been one to let the carrier drop

So, ChatGPT kept giving me *terrible* advice for what to do when a provider provides only a /64 and you have a firewall in front of your LAN.

The solution is actually fairly straightforward, providing you are using static or DHCP assigned addresses:

0) Turn on routing and proxy ndp:

net.ipv6.conf.all.forwarding=1

net.ipv6.conf.all.accept_ra=2

net.ipv6.conf.all.proxy_ndp=1

1) Install ndppd.conf with a config file similar to this:

route-ttl 30000

proxy ens192 {

    router yes

    timeout 500
    rule 2605:9f80:2000:110::/64 {

        static

    }

}

2) Create a interface on the upstream side of the firewall that is 2605:9f80:2000:110::2/64
3) Create a interface on the downstream side of the firewall that is 2605:9f80:2000:110:8000::1/65
4) Assign addresses inside that /65 to other things on the LAN

Advantages over the ChatGPT suggested solution of manually entering a /128 route and creating a /128 entry and adding a fd00 interface to every host:

#1: It keeps the wire settigns “honest”. Setting a /128 for each host means you are lying to the host about the wire. This can cause local traffic problems even if the router does route single-homed traffic

#2: It’s *simple*. Set it up once, forget about it. Minimal configuration needed. No need to add additional configuration to the router as you add each host.

#3: It fits conventional subnetting rules. Even though normally one never assigns ipv6 smaller than a /64 so that self-addressing can work correctly, if one is using statics or a DHCP server this works just fine, while also fitting the way we usually subnet IP networks.

Mom 80 – Happy Revolution Day

(With thanks to How Kuff for the concept of birthdays as revolution days)

God knows you weren’t the perfect parent
God knows I wasn’t the perfect child
You were a bit too bound by your tribe
I was maybe a bit too wild

But we’ve found our way through the years
And ended up as friends
You were there at the place where my road started
I’ll be there at the place yours ends

Happy revolution day
One more time around
Where the falling angel meets the rising ape
Standing on holy ground

You’ve been there through bad times and good
I’ll been there through dark and light
We’ve found many things to talk about
In this shadow play of wrong and right

You’ve made it through 80 journeys around the sun
With the laughter and the tears
And I feel certain that you find wisdom
In the exposure to the years

Happy revolution day
One more time around
I hope the laughter has outweighed the tears
I hope whatever you looked for you found