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The latest blog posts to take off on Hacker News. 3,021 posts.
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So You Want to Define a Well-Known URI
When to reach for a well-known URI — and the traps that catch most protocol designers.
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10Gb/s Ethernet: switching to a Broadcom SFP+ module
As predicted by several people, one of my Marvell-based SFP+ modules had overheating problems. I've switched it over to a Broadcom-based one, and it looks better, though I can't be certain.
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Iroh 1.0
Iroh 1.0 is out. Now is the time to build.
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Flat Datacenter Networks at Scale at Amazon
The research roots of finding “optimal routing” networks trace back to the late 1970s. Mathematicians defined special kinds of networks called “expanders“. These are graphs with strong connectivity properties guaranteeing no subset of vertices can be isolated from the rest. In 1976, Leslie Valiant gave one of the…
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I'm building a parallel internet, and it's called The Thinnernet
Since 2020, I've taken on a Steve Jobs alter-ego (on a very, very part time basis, and often for humor purposes ). The firs...
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The Quiet Numbers Station: Decoding Nineteen Years of GPS Cryptography
The Global Positioning System (GPS) relies on its primary L1 frequency to broadcast precise timing and orbital data, allowing receivers on Earth to calculate their exact location. Because the L1 C/A signal transmits at just fifty bits per second, every bit of this navigation data must earn its place. Yet, within this…
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IPv6 zones in URLs are a mistake
Run away while you still can, it's not too late for you to avoid the curse of knowledge.
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thunderbolt-ibverbs: We have InfiniBand at home
Linux kernel experiments implementing IB verbs over consumer Thunderbolt/USB4 hardware to give cheap mini-PCs high-performance RDMA suitable for cluster inference.
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Parallel Reconstruction of Lawful TLS Wiretapping
Transport Layer Security (TLS) is the protocol involved in getting the lock icon to appear in your browser next to the URL. Under the hood it uses a bunch of really cool numbers for encryption. Some numbers are considered private and need securing; some are considered public and are fine for sharing. You can mix your…
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Accenture to acquire Ookla
Accenture has entered into an agreement to acquire Ookla, a global leader in network intelligence, competitive benchmarking and customer experience analytics.
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I'm Getting into Mesh Networks (Meshtastic, MeshCore, and Reticulum)
I love networking, a lot. So much so that I've run my own ISP since 2024, complete with its own ASN, IPv4/6 address space, fiber optics, etc. However, do this and you quickly realize how reliant you still remain on central service providers. The internet is a mesh,
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What Apple and Google are doing to push notifications
I wrote recently about what Google, Yahoo, Microsoft, and Apple are doing to your email: how four providers stopped being transport layers and turned into active intermediaries between brands and their customers, parsing, ranking, summarising, and increasingly answering on the recipient's behalf.
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Gemini, Gophers, and Fingers. Oh My Alternative Internets Beyond HTTPS
Finger from 1971, Gopher from 1991, and Gemini from 2019. These protocols offer decentralized, terminal-based alternatives to the modern web. The small web…
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Indoor Wi-Fi Roaming with OpenWRT
A few months after writing up the Cudy AX3000 units and moving the house over to OpenWRT, I ended up revisiting the one bit I had deliberately waved away ...
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Gnutella: A Protocol Outliving the World That Created It
Gnutella Explanation
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Are we self-sovereign PKI yet?
Every end-to-end encrypted messenger ships a fingerprint UI. Almost nobody opens it. A note on what's actually missing.
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Wi-Wi is wireless time sync at 1 nanosecond
At NAB, I found a demo of Wi-Wi STAMP, a wireless time synchronization protocol that came out of Japan's NICT. Wi-Wi stands for Wireless 2Way interferometry, and it uses the 900 MHz band for picosecond-level time sync, and mm-level distance accuracy, in a tiny box, currently the size of a smartphone. The system is…
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Anyone on the Internet Can Ring Your Doorbell
Behind a cheap Temu doorbell sits an IoT backend where device IDs are sequential and requests are forgeable with a string baked into every firmware. One signed call lifts any device's persistent password and lets anyone on the Internet hijack the next live call.
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Mullvad exit IPs are surprisingly identifying
Update 5/29: Mullvad has begun rolling out a mitigation feature on their servers that scrambles exit IP positions, thereby fixing this issue. IPs are still deterministically selected based on the pubkey. Mullvad is one of the few VPN providers that offers multiple exit IPs for its servers. If two people connect to the…
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Gaining control of every projector and camera on campus
While starting my first year at the Colorado School of Mines, I came across a rather interesting fact: the local DNS servers will assign a subdomain to each device that connects to the network. This means that a device called “meow” will be visible as “meow.mines.edu” on any campus wifi, though the network still…
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Setting up a free *.city.state.us locality domain (2025)
In the US, you can get a domain name like `somename.city.state.us` for free. If your town has its own domain, you can get nameservers from Amazon Lightsail, send the *Interim .US Domain Template* to the delegated manager for your locality, then point DNS entries at your webhost.
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SecurityBaseline.eu
On May 13, 2026, the website SecurityBaseline.eu was launched. It is a spin-off from the Dutch “Basisbeveiliging”, which has monitored baseline security for over a decade and is part of governmental policy. Three months ago we sent tens of thousands of e-mails to European governments indicating the new site would…
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When “idle” isn't idle: how a Linux kernel optimization became a QUIC bug
We investigated a bug where CUBIC's congestion window became pinned at its minimum floor, causing a performance to plummet. The fix involved correctly measuring idle periods to distinguish RTT wait times from actual application idleness.
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Quack: The DuckDB Client-Server Protocol
DuckDB instances can now talk to each other using the Quack remote protocol. This lets you run DuckDB in a client-server setup with multiple concurrent writers. In DuckDB's spirit, Quack is simple to set up and builds on proven technologies such as HTTP. It's also fast, which allows it to support workloads ranging…
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Extremely Low Frequencies
The submarine is a surprisingly ancient technology—at least in its early, primitive forms. The idea is quite simple, that a well-enough-sealed boat ought to be able to submerge and resurface. It's the practicalities that make the whole thing difficult. It is generally considered that the US Civil War was the first use…
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How Fast Does Claude, Acting as a User Space IP Stack, Respond to Pings?
Here is a fun thought: if we ask Claude Code to act as a user space IP stack, how quickly will it be able to respond to a ping?
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An Introduction to Meshtastic
Discover Meshtastic: a community-driven, open-source project using LoRa radios for long-range, off-grid communication.
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OpenAI’s WebRTC problem
Media over QUIC: There are ways to do voice AI without being traumatized by WebRTC.