Today in our newest take on "older technology is better": why NAT rules!
Fire bad, change scary
this post was submitted on 19 Jun 2024
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Bro used <> instead of !=
What languages use this? I don't like it!
On the other hand it goes well with >= and <=. If >= means "either > or =" then <> means "either < or >", it checks out.
But I still don't like it.
BASIC. At least VB.
I think Excel formulas also use this, but it's been a long time so I might be misremembering.
SQL uses it but yeah, not programming language :p.
I was on mobile so I didn't have a .XCompose available to type ≠.
I was on mobile so I didn't have a
.XComposeavailable to type.
I feel the opposite. On mobile I have much easier access to special characters. I just need to hold down characters to get more variants.
Yup, ≠ is right “under” =. As is ≈.
SQL is definitely a programming language. Most dialects are Turing-complete in some way. Some allow custom functions and stored procedures.
Damn I never understood it but now it makes sense thanks to you
Yea it’s ugly 😭
logo does
Honestly we should just use 4 bit ip addresses, it’s too hard for me to remember ipv4 addresses anyways. Carrier grade NAT will take care of the rest.
You can still NAT IPv6
I haven't read anything this cursed in a while
Yes, but why would you want to? We have enough addresses for the foreseeable future.
1:1 stateless NAT is useful for static IPs. Since all your addresses are otherwise global, if you need to switch providers or give up your /64, then you'll need to re-address your static addresses. Instead, you can give your machines static private IPs, and just translate the prefix when going through NAT. It's a lot less horrible than IPv4 NAT since there's no connection tracking needed.
This is something I probably should have done setting up my home Kubernetes cluster. My current IPv6 prefix is from Hurricane Electric, and if my ISP ever gives me a real IPv6 prefix, I will have to delete the entire cluster and recreate it with the new prefix.
It should only be needed if your ISP is brain-dead and only gives you a /64 instead of what they should be doing and also giving you a /56 or /48 with prefix delegation (I.e it should be getting both a 64 for the wan interface, and a delegation for routing)
You router should be using that prefix and sticking just a /64 on the lan interface which it advertises appropriately (and you can route the others as you please)
Internal ipv6 should be using site-local ipv6, and if they have internet access they would have both addresses.
64 for the wan interface
Nitpicking, but the address for the wan interface wouldn't have a prefix, so the host would just set it as a /128 (point-to-point)
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My ISP does this right (provides a /56 for routing), but unfortunately both are dynamic and change periodically. Every time I disconnect and reconnect from the internet, I get a different prefix.
I ended up needing to have ULAs for devices where I need to know the IPv6 address on my network (e.g. my internal DNS servers).
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Hurricane Electric gives me a /48.
Site-local ipv6 would work here as well, true. But then my containers wouldnt have internet access. Kubernetes containers use Ipam with a single subnet, they can't use SLAAC.
Point is, you should be able to have them have both. Or stick a reverse proxy in front that can translate. Unless they're somehow meant to be directly internet reachable the public addresses could be autogenerated
Full disclosure though I don't know anything about kubernetes.
Yeah, I wonder if there's any proposals to allow for multiple IPV6 addresses in Kubernetes, it would be a much better solution than NAT.
As far as I know, it's currently not possible. Every container/Pod receives a single IPv4 and/or IPv6 address on creation from the networking driver.
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That's what they thought for IPv4... and for 2-year digits... and for...
Only if you're a masochist.
Ha I can remember the ipv6 of cloudflare DNS just fine! It's uh..... something : something : something :: 1111
2606:4700:4700::1111
Hmm, maybe Google is easier:
2001:4860:4860::8888
Quad9 is 2620:fe::fe or 2620:fe::9
I don't understand why they can't get better addresses than that. Like surely 1::1 would be valid?
Edit: So IANA only control addresses 2001:: and up and there are quite a few IETF reservations within that. I don't know why they picked such a high number to start at. Everything else seems IETF reserved with a little space allocated for special purposes (link-local, multicast, etc.).
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Ipv6 is not 6 bytes? 8 segments of 2 bytes for a sum of 16 bytes?
Or am I stupid right now?
Yes, you've got it right. <> means ≠. 16 is not equal to 6.
Never seen that Notation.
IPv6 is unfortunately not six bytes, no. For some weird, ass-backwards reason.
Because 48 bits over 32 bits does not really solve the problems with ip4. 128 bits basically gives one ip4 address space to each square meter of earth. Ip6 also drops all the unused and silly parts of ip4 too.
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~~2 bytes would give you 0-4 per segment. Or about IPv2~~
2 bytes would be 0-65535 and 8 sets is ~3.4×10^(38) addresses
Whoops, bits vs bytes. This is why I should stop commenting before I've had coffee
Mystery of the universe, would IPv5 have hit the sweet spot and taken off?
6 ≠ 16
v ≠ o
IPv6 = second system effect. It's way too complicated for what was needed and this complexity hinders its adoption. We don't need 100 ip addresses for every atom on the earth's surface and we never will.
They should have just added an octet to IPv4 and be done with it.
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Well... I still like IPv6 better than ATM and those darn virtual circuit identifiers.
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