News for hackers. Stuff that matters.

A comment on Why is IPv6 so complicated?. Parent comment

Re:Why is IPv6 so complicated? by general1465 on Sunday April 19, 2026 @08:50AM (#47823932)
> Even a correctly-configured NAT will let connections in from outside, and a lot of people don't understand this.

Yes, that's called port forwarding and it is normal thing. You actually want that.

[ Parent | on HN ]
Re:Why is IPv6 so complicated? by Dagger2 on Sunday April 19, 2026 @12:19PM (#47825408)
It will let them in without a port forward in place. The port forward just rewrites the IP on an incoming connection, nothing more.
[ Parent | on HN ]
Re:Why is IPv6 so complicated? by general1465 on Sunday April 19, 2026 @12:50PM (#47825627)
If you can reuse opened connection, but that will work with firewall too.
[ Parent | on HN ]
Re:Why is IPv6 so complicated? by Dagger2 on Sunday April 19, 2026 @01:46PM (#47826119)
You don't need any tricks like that. Regular new connections will work.
[ Parent | on HN ]
Re:Why is IPv6 so complicated? by general1465 on Monday April 20, 2026 @08:32AM (#47833351)
No it won't because that's not how NAT is working.
[ Parent | on HN ]
Re:Why is IPv6 so complicated? by Dagger2 on Tuesday April 21, 2026 @09:22AM (#47848466)
It will, and if you test it then it does.

NAT doesn't apply to inbound connections if you don't have a matching port forward rule, so it kind of doesn't matter how NAT works here. This is pure routing, not NAT.

[ Parent | on HN ]