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As soon as we get to about 70%, I reckon some games and apps will stop supporting ipv4 on the basis that nat traversal is a pain and dual stack networking is a

As soon as we get to about 70%, I reckon some games and apps will stop supporting ipv4 on the basis that nat traversal is a pain and dual stack networking is a pain. If you spend 2 days vibe coding some chat app and then you have to spend 2 further days debugging why file sharing doesn't work for ipv4 users behind nat, you might just say it isn't supported for people whose ISP's use 'older technology'. After that, I reckon the transition will speed up a lot.

RedShift1 1y ago
What makes you think filesharing is going to work any better on IPv6?
- kccqzy 1y ago
  NAT traversal not needed. Just need to deal with firewalls. So that's one fewer thing to think about when doing peer-to-peer file sharing over the internet.
  - ectospheno 1y ago
    “Just need to deal with firewalls.” The only sane thing to do in a SLAAC setup is block everything. So no, it isn’t a solved problem just because you used ipv6.
    - kccqzy 1y ago
      No. Here's a simple strategy: the two peers send each other a few packets simultaneously, then the firewall will open because by default almost all firewalls allow response traffic. IPv6 simplifies things because you know exactly what address to send to.
      - ectospheno 1y ago
        That is my point. You hole punch in that scenario even without NAT. It is no easier.
        the8472 1y ago
        It's easier since you don't don't have to deal with symmetric nat, external IP address discovery and port mapping.
    - deleted 1y ago
      [deleted]
gruturo 1y ago
> some games and apps will stop supporting ipv4 on the basis that nat traversal is a pain and dual stack networking is a pain None of these are actually the game/app developers' problem. The OS takes care of them for you (you may need code for e2e connectivity when both are behind a NAT, but STUN/TURN/whatever we do nowadays is trivial to implement).
- eqvinox 1y ago
  > None of these are actually the game/app developers' problem. Except people complain to the game/app developer when it doesn't work.

RedShift1 1y ago

What makes you think filesharing is going to work any better on IPv6?

kccqzy 1y ago
NAT traversal not needed. Just need to deal with firewalls. So that's one fewer thing to think about when doing peer-to-peer file sharing over the internet.
- ectospheno 1y ago
  “Just need to deal with firewalls.” The only sane thing to do in a SLAAC setup is block everything. So no, it isn’t a solved problem just because you used ipv6.
  - kccqzy 1y ago
    No. Here's a simple strategy: the two peers send each other a few packets simultaneously, then the firewall will open because by default almost all firewalls allow response traffic. IPv6 simplifies things because you know exactly what address to send to.
    - ectospheno 1y ago
      That is my point. You hole punch in that scenario even without NAT. It is no easier.
      - the8472 1y ago
        It's easier since you don't don't have to deal with symmetric nat, external IP address discovery and port mapping.
  - deleted 1y ago
    [deleted]

gruturo 1y ago

> some games and apps will stop supporting ipv4 on the basis that nat traversal is a pain and dual stack networking is a pain None of these are actually the game/app developers' problem. The OS takes care of them for you (you may need code for e2e connectivity when both are behind a NAT, but STUN/TURN/whatever we do nowadays is trivial to implement).

eqvinox 1y ago
> None of these are actually the game/app developers' problem. Except people complain to the game/app developer when it doesn't work.