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The Wi-Fi only works when it's raining
The strangest hardware problem I've ever had to debug.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 3,019 posts.
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Load Balancing
A bottom-up, animated guide to HTTP load balancing algorithms.
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Mystery signal from a helicopter
I heard a mysterious sound in a Youtube video and started to investigate.
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A Facebook crawler was making 7M requests per day to my stupid website
Francesco Napoletano is a highly competent staff software engineer with 20+ years of experience developing a wide range of tools and applications for the web stack.
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Hijack of Amazon’s domain service used to reroute web traffic for two hours
Between 11am until 1pm UTC today, DNS traffic — the phone book of the internet, routing you to your favourite websites — was hijacked by an…
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A joke domain purchase turned in geopolitical warfare
Why is the military and a cheese fortune teller contacting me about SondeHub.org
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How SSH got port number 22
The SSH port is 22. This is the story of how it got that port number. And practical configuration instructions.
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An off-grid social network
Open Source Freelancer
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Bug in macOS 14 Sonoma prevents our app from working
The macOS 14 Sonoma betas and release candidate contain a bug that causes the firewall to not filter traffic correctly. As a result, our app does not work.
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Engineering for Slow Internet
How to minimize user frustration in Antarctica.
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Flightradar24's new GPS jamming map
Learn how to view areas of GPS jamming affecting aircraft around the world and how GPS jamming affects aviation.
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Turns out half the internet has a single-point-of-failure called “Cloudflare”
On Friday a large chunk of the internet went off the air when Cloudflare apparently fat-fingered a routing update and sent all of their global traffic to a single POP, vaporizing it almost instantly. This affected their DNS service, and of course, as everybody knows, when your DNS is gone,…
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Passkeys: A shattered dream
Firstyear's blog
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A visual guide to SSH tunnels
This page explains use cases and examples of SSH tunnels while visually presenting the traffic flows. For example, here's a reverse tunnel that allows only users from IP address 1.2.3.4 access to port 80 on the SSH client through an SSH server.
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Mess with DNS
New tool: Mess with DNS!
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Eight Bits of Trust: eMudhra's CA keys cracked in milliseconds
One of eMudhra's certificate authority private keys is the number 4. Not a number that starts with 4, or the number 4 followed by a few hundred random digits, just, 4... Another one is 56, and another is 115. I know, because I recovered all of them from their
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There were BGP anomalies during the Venezuela blackout
The Low Orbit Security Radar is a weekly security newsletter from an offensive practitioner's perspective. One idea, curated news, and links worth your time. News: There Were BGP Anomalies During The Venezuela Blackout When watching the situation in Venezuela unfold, the phrase "It was dark, the lights of Caracas
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Google Is Turning Off the Works-with-Nest API
Learn about Google Nest, account changes, Works with Nest and more
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UK air traffic control meltdown
Some notes about the UK air traffic control meltdown
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Net neutrality is in jeopardy again
Net neutrality is in jeopardy again. We need another grassroots movement By Ashley Boyd, VP Advocacy A little over two years ago, the mood here at Mozil
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We’re making Bunny DNS free
Your DNS bill shouldn't scale with your traffic. So we removed query fees from Bunny DNS entirely. No per-request billing and no query limits.
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Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache
Five Rust-level memory optimizations to the DNS cache layout of Big Pineapple cut per-entry memory by 56%, freeing approximately 100 TB of memory across Cloudflare's fleet.
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PySkyWiFi: Free stupid wi-fi on long-haul flights
The plane reached 10,000ft. I took out my laptop, planning to peruse the internet and maybe do a little work if I got really desperate.
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How the Catalan government uses IPFS to sidestep Spain's legal block
Catalonia, with Barcelona as its capital, is currently one of Spain’s seventeen autonomous comunities. It has a long story of pro-independence movements, and has even declared itself independent in the past. Nowadays, the political climate is very heated up. A majority of catalan people want to hold a referendum for…