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Moltbook isn't real but it can still hurt you

https://12gramsofcarbon.com/p/tech-things-moltbook-isnt-real-but
1•theahura•2m ago•0 comments

Take Back the Em Dash–and Your Voice

https://spin.atomicobject.com/take-back-em-dash/
1•ingve•2m ago•0 comments

Show HN: 289x speedup over MLP using Spectral Graphs

https://zenodo.org/login/?next=%2Fme%2Fuploads%3Fq%3D%26f%3Dshared_with_me%25253Afalse%26l%3Dlist...
1•andrespi•3m ago•0 comments

Teaching Mathematics

https://www.karlin.mff.cuni.cz/~spurny/doc/articles/arnold.htm
1•samuel246•6m ago•0 comments

3D Printed Microfluidic Multiplexing [video]

https://www.youtube.com/watch?v=VZ2ZcOzLnGg
2•downboots•6m ago•0 comments

Abstractions Are in the Eye of the Beholder

https://software.rajivprab.com/2019/08/29/abstractions-are-in-the-eye-of-the-beholder/
2•whack•6m ago•0 comments

Show HN: Routed Attention – 75-99% savings by routing between O(N) and O(N²)

https://zenodo.org/records/18518956
1•MikeBee•7m ago•0 comments

We didn't ask for this internet – Ezra Klein show [video]

https://www.youtube.com/shorts/ve02F0gyfjY
1•softwaredoug•7m ago•0 comments

The Real AI Talent War Is for Plumbers and Electricians

https://www.wired.com/story/why-there-arent-enough-electricians-and-plumbers-to-build-ai-data-cen...
2•geox•10m ago•0 comments

Show HN: MimiClaw, OpenClaw(Clawdbot)on $5 Chips

https://github.com/memovai/mimiclaw
1•ssslvky1•10m ago•0 comments

I Maintain My Blog in the Age of Agents

https://www.jerpint.io/blog/2026-02-07-how-i-maintain-my-blog-in-the-age-of-agents/
2•jerpint•11m ago•0 comments

The Fall of the Nerds

https://www.noahpinion.blog/p/the-fall-of-the-nerds
1•otoolep•12m ago•0 comments

I'm 15 and built a free tool for reading Greek/Latin texts. Would love feedback

https://the-lexicon-project.netlify.app/
2•breadwithjam•15m ago•1 comments

How close is AI to taking my job?

https://epoch.ai/gradient-updates/how-close-is-ai-to-taking-my-job
1•cjbarber•16m ago•0 comments

You are the reason I am not reviewing this PR

https://github.com/NixOS/nixpkgs/pull/479442
2•midzer•17m ago•1 comments

Show HN: FamilyMemories.video – Turn static old photos into 5s AI videos

https://familymemories.video
1•tareq_•19m ago•0 comments

How Meta Made Linux a Planet-Scale Load Balancer

https://softwarefrontier.substack.com/p/how-meta-turned-the-linux-kernel
1•CortexFlow•19m ago•0 comments

A Turing Test for AI Coding

https://t-cadet.github.io/programming-wisdom/#2026-02-06-a-turing-test-for-ai-coding
2•phi-system•19m ago•0 comments

How to Identify and Eliminate Unused AWS Resources

https://medium.com/@vkelk/how-to-identify-and-eliminate-unused-aws-resources-b0e2040b4de8
3•vkelk•20m ago•0 comments

A2CDVI – HDMI output from from the Apple IIc's digital video output connector

https://github.com/MrTechGadget/A2C_DVI_SMD
2•mmoogle•21m ago•0 comments

CLI for Common Playwright Actions

https://github.com/microsoft/playwright-cli
3•saikatsg•22m ago•0 comments

Would you use an e-commerce platform that shares transaction fees with users?

https://moondala.one/
1•HamoodBahzar•23m ago•1 comments

Show HN: SafeClaw – a way to manage multiple Claude Code instances in containers

https://github.com/ykdojo/safeclaw
3•ykdojo•26m ago•0 comments

The Future of the Global Open-Source AI Ecosystem: From DeepSeek to AI+

https://huggingface.co/blog/huggingface/one-year-since-the-deepseek-moment-blog-3
3•gmays•27m ago•0 comments

The Evolution of the Interface

https://www.asktog.com/columns/038MacUITrends.html
2•dhruv3006•28m ago•1 comments

Azure: Virtual network routing appliance overview

https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-routing-appliance-overview
3•mariuz•29m ago•0 comments

Seedance2 – multi-shot AI video generation

https://www.genstory.app/story-template/seedance2-ai-story-generator
2•RyanMu•32m ago•1 comments

Πfs – The Data-Free Filesystem

https://github.com/philipl/pifs
2•ravenical•35m ago•0 comments

Go-busybox: A sandboxable port of busybox for AI agents

https://github.com/rcarmo/go-busybox
3•rcarmo•36m ago•0 comments

Quantization-Aware Distillation for NVFP4 Inference Accuracy Recovery [pdf]

https://research.nvidia.com/labs/nemotron/files/NVFP4-QAD-Report.pdf
2•gmays•37m ago•0 comments
Open in hackernews

.arpa, rDNS and a few magical ICMP hacks

https://sdomi.pl/weblog/24-arpa-hacks/
62•caminanteblanco•3mo ago

Comments

possiblelion•3mo ago
super interesting. the early days of military networks always fascinate me, especially the legacy holdovers like .arpa
ectospheno•3mo ago
Between resolver.arpa, ipv4only.arpa, and the fact that your email won't be delivered to anywhere you actually care about without in-addr.arpa I'm not sure I'd call it legacy.
caminanteblanco•3mo ago
I didn't even realize that half of the parts of the stack mentioned here existed. I'm going through the process of setting up a home server, and this is definitely giving me some ideas for nonsense to implement.
anonymousiam•3mo ago
Reverse delegation (RFC 2317) is the way IP-to-FQDN lookups are usually done now. Before this was popular, you could get your ISP to defer to your DNS for reverse records directly, versus them using a set of individual PTR records.

Even though the RFC was written in 1998, it took a while for it to catch on. For years, my DNS servers were using both methods.

Both methods make use of the .in-addr.arpa "domain" syntax.

ranger_danger•3mo ago
> Reverse delegation (RFC 2317) is the way IP-to-FQDN lookups are usually done now

> Before this was popular, you could get your ISP to defer to your DNS for reverse records directly

I'm not actually seeing the difference between these two... besides this new "reverse delegation" allowing different nameservers for prefixes longer than /24... aren't you still relying on your ISP/upstream provider (if you don't own your own IPs) to delegate reverse lookups to your own DNS server either way?

merlyn•3mo ago
Correct, what RFC2317 brings you, is an example of you creating a new namespace in some structured format (IIRC, there are three different example formats given in this RFC), and you just have the upstream ISP, which has the reverse delegation done on the zone cut boundary for the IP ranges it controls inserting a CNAME out to your new namespace on nameservers you control for the reverse PTRs so the reverse PTRs can be formed that way.

Running a long time ISP, I found extremely few customers wanting to do something like RFC2317, or could actually figure out and do it effectively. Almost all were content with control panel/API and having the ISP do it after I pointed them to this informational RFC asking them if this is what they wanted.

anonymousiam•3mo ago
I think part of the reason most ISPs don't support RFC2317 or reverse delegation is that it makes it easy for a bad actor who's in charge of the DNS server being delegated to, to spoof any domain they want. The consequences of this sort of spoofing have now been limited by other systems and protocols anyway, so it's not as big of a deal.

ISPs prefer to have direct control of the reverse lookups within their IP blocks so they can ensure the integrity of the information.