IPv6 Tricks

IPv6 just turned 30 and still hasn’t taken over the world.

As usual, the Hacker News comments are full of utter idiots. More than half of the people there (mostly the ones praising IPv6) who speak authoritatively about networking know fuck-all about it. Which is the norm there.

Like this fucking clown talking about IPv4 and NAT. His claim that โ€œthe connection will just head right on through your routerโ€ is 100% false for a normal NAT gateway. Doesn’t matter where the traffic originates as as long it’s coming from a public IP. His comments are fully wrong. Packets arriving from the internet are addressed to the routerโ€™s WAN IP. Without a DNAT/port-forward rule (or an existing NAT state entry that matches), the router does fucking not โ€œroute them onwardโ€ to some LAN host. There is no destination inside to route to because the destination is the router itself. This cannot, cannot happen. Idiot.

The comment how about how โ€œNAT only changes the source addressโ€ is also wrong. Typical residential NAT is always NAPT/PAT (address and port translation) and is stateful.That means it creates a mapping only when an inside host sends outbound traffic first and uses that mapping to translate inbound return traffic. Unmatched inbound traffic is dropped because it canโ€™t be translated. Period. Therefore, that makes NAT a very effective security measure for essentially free.

From the outside, you simply cannot open a new TCP connection to an arbitrary PC on a residential network behind a simple NAT without port forwarding or some other explicit/implicit mapping mechanism. Thus, Dagger2 is a clown idiot, as mentioned above.

Motherfuckers are always like, “NAT is not a firewall!” And never, ever, ever, understand how NAT actually works. Blows my mind.

Poppies Trimmed

I think a large part of why the left despises “attempting to do difficult things” in and of itself is that if someone succeeds in doing so that ipso facto disproves their inane notions about everyone being exactly the same.

Thus, every time someone brings about anything in the world that someone else definitely could not have created, this case of de novo instantiation acts as an implicit rebuke against the left’s moronic leveling egalitarianism that desires only to cruelly cut down anyone who excels. This should be resisted at nearly any cost.

Linux is good now, and if you want to feel like you actually own your PC, make 2026 the year of Linux on (your) desktop.

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You guys always suspect the algorithms are rigged against you, but the reality is actually so much more depressing than the conspiracy theories.