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Using the Internet without IPv4 connectivity

jamesmcm.github.io

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Re: Using the Internet without IPv4 connectivity

#11

Post by sylware »

Blockers for switching off IPv4:

- I am using alternative search engines, and it seems most do not provide IPv6 connectivity (when they are not wrecked by big tech gigantic network resources, you know "AI"... how to conveniently DDOS alternatives...)

- github.com: zero ipv6 last time I did check. This is microsoft, do not expect anything good, actually expect the worst, for instance they broke recently noscript/basic (x)html for the issues. Can we still create a account with a noscript/basic (x)html browser and self-hosted emails with IP(v6) literals (mailbox@[ipv6:...])?

- steam? games? Did not check lately. I think many CDNs/game servers or good chunks of them are still IPv4 only.

- many email servers: additionnally many blocks self-hosted email servers (often due to the usage of clumsy and inappropriate block lists from spamhaus, a shaddy company from Switzerland and Andore), with a DNS (SPF) or ip literals (even if it is much stronger than SPF).

- A lot of network applications do not leverage the power of IPv6: for instance for the client-server applications (web for instance), a client-server session should be using a randomly generated IPv6 address, if the ISP provides a not to big prefix. Mobile internet IPv6 ISPs seem to provide random IPv6/128 addresses (in their prefixes), but should provide a stable prefix (probably 96bits) in order to let the terminal applications choose "fixed" ipv6 addresses for direct audio/video calls (no central and online name resolution required). A new user-level OS service is required for user application IPv6 address coordination (beware of brain damaged complexity which some vendors and developer will force upon users and app devs for lock-in).

Re: Using the Internet without IPv4 connectivity

#12

Post by Sesse__ »

Gigachad wrote: post #5
JimDabell wrote: post #4

One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.

Is github accessible by v6 as long as you use the app?

”v6-only” in this context generally means ”with NAT64”, so only kind of.

Re: Using the Internet without IPv4 connectivity

#13

Post by pumplekin »

If you ever need a quick hack to get v4 connectivity over a true v6 only setup, you can use a public DNS64+NAT64 Gateway. You can find a list at https://nat64.net/public-providers. So for most regular use, all you are doing is changing DNS servers.

This is the combo.

** 1. DNS64

Synthesis of AAAA DNS records for things that don't have them to a NAT64 box.

$ dig +short @2a00:1098:2c::1 AAAA github.com

2a01:4f8:c2c:123f:64:5:141a:9cd7

** 2. NAT64.

Will take this traffic thats been sent to it because of DNS64 and protocol translate + NAT it for you.

$ curl --resolve github.com:443:[2a01:4f8:c2c:123f:64:5:141a:9cd7] https://github.com/

Re: Using the Internet without IPv4 connectivity

#14

Post by neilalexander »

Gigachad wrote: post #5
JimDabell wrote: post #4

One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.

Is github accessible by v6 as long as you use the app?

No, their policy is that you have to use IPv6-capable sockets and APIs, not that the remote endpoints are accessible over IPv6.

Re: Using the Internet without IPv4 connectivity

#15

Post by czbd »

daneel_w wrote: post #8
thexa4 wrote: post #2

If anyone else runs into this, it's very easy to set up an ssh proxy: ssh -D 8080 user@hostname Once that connection is set up, point your browser to use localhost:8080 as a socks proxy.

I was just about to offer the same advice. It's a far simpler solution to a temporary problem - and equally, a permanent tool for the times when you want to proxy. Don't forget that this function needs "AllowTcpForwarding" to be enabled in your sshd_config.

And I just managed to offer the same advice, then upon posting discovered I'd been beaten lol.

This simple solution versus the article reminds me of McIlroy and Knuth: https://news.ycombinator.com/item?id=35915169

Re: Using the Internet without IPv4 connectivity

#16

Post by hashworks »

sylware wrote: post #11

Blockers for switching off IPv4: - I am using alternative search engines, and it seems most do not provide IPv6 connectivity (when they are not wrecked by big tech gigantic network resources, you know "AI"... how to conveniently DDOS alternatives...) - github.com: zero ipv6 last time I did check. This is microsoft, do not expect anything good, actually expect the worst, for instance they broke recently noscript/basic…

I can confirm that Steam requires IPv4. Also some games that require authentication to play do too.

Re: Using the Internet without IPv4 connectivity

#18

Post by xvilka »

Gigachad wrote: post #5
JimDabell wrote: post #4

One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.

Is github accessible by v6 as long as you use the app?

GitHub doesn't support IPv6 yet[1]. Ridiculous but true.

[1] https://github.com/orgs/community/discussions/10539

Re: Using the Internet without IPv4 connectivity

#19

Post by the_mitsuhiko »

JimDabell wrote: post #4

One thing I appreciate about Apple’s App Store rules is that they require all apps to work on IPv6-only networks. They’ve had that rule in place for many years. It’s a little surprising as a developer the first time you run into it, but I’m glad it’s there as a user.

Yes, but it does not require your server to have an IPv6 address.

Re: Using the Internet without IPv4 connectivity

#20

Post by danappelxx »

simonjgreen wrote: post #3

Slightly misleading title, this is more “getting to the IPv4 internet via an IPv6 tunnel through a VPS”. Also just called 4in6. Interesting nonetheless! We find at our ISP that if we break something with IPv4 we experience a very different type of support issue to if we break IPv6. Breaking v4 results in, broadly, a pretty hard “down” state. While folks are unhappy, it is at least simple. Breaking v6 results in weird…

Mirrors my experience. IPv6 issues are frustratingly hard to triage and reproduce, lots of “works on my machine” etc.
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