this post was submitted on 14 Dec 2024
58 points (92.6% liked)

Selfhosted

40633 readers
318 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

  1. Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.

  2. No spam posting.

  3. Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.

  4. Don't duplicate the full text of your blog or github here. Just post the link for folks to click.

  5. Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).

  6. No trolling.

Resources:

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 2 years ago
MODERATORS
 

Good FOSS software and reliable service providers? Etc.

you are viewing a single comment's thread
view the rest of the comments
[–] sugar_in_your_tea@sh.itjust.works 0 points 2 days ago (1 children)

IPv6 doesn't help anything if you're behind CGNAT, you can have internal-only IPv6. There are good reasons to not have every household directly accessible to the outside world, so I'm sympathetic to that, but they also seem to love charging extra for it.

[–] chronicledmonocle@lemmy.world 2 points 2 days ago* (last edited 2 days ago) (1 children)

CGNAT only applies to IPv4. You cannot NAT IPv6 effectively. It's not designed to be NATed. While there IS provisions for private IPv6 addressing, nobody actually does it because it's pointless.

[–] sugar_in_your_tea@sh.itjust.works 1 points 1 day ago (1 children)

Sure, but NPTv6 exists, and I wouldn't put it past an ISP to do something like that.

[–] chronicledmonocle@lemmy.world 1 points 1 day ago (1 children)

Network Prefix Translation isn't the same thing. That's used for things like MultiWAN so that your IPv6 subnet from another WAN during a failover event can still communicate by chopping off the first half and replacing the subnet with the one from the secondary WAN. It is not NAT like in IPv4 and doesn't have all of the pitfalls and gotchas. You still have direct communications without the need for things like port forwarding or 1:1 NAT translations.

I'm a Network Engineer of over a decade and a half. I live and breath this shit. Lol.

[–] sugar_in_your_tea@sh.itjust.works 0 points 1 day ago (1 children)

Yes, it's not the same, but it can be used to bridge private addresses onto a public network, which is basically what NAT is trying to achieve. If you're running an ISP and don't want customers to be directly accessible from the internet, it seems reasonable. In an ISP setup, you would issue private net addresses and just not do the translation if the customer doesn't pay.

Yes, you can achieve the same thing another way, but I could see them deciding to issue private net addresses so customers don't expect public routing without paying, whereas issuing regular public IPv6 addresses makes it clear that the block is entirely artificial.

Just because you can doesn't mean anyone does. I've never seen an ISP hand out "private" IPv6 addresses. Ever.

If you're doing NAT on IPv6, you're doing it wrong and stupid. Plain and simple.