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Fun with IP address parsing
A quick rundown of the many text representations of IP addresses.
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The latest blog posts to take off on Hacker News. 127 posts.
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WiFi 6 gets 1.34 Gbps on the Raspberry Pi CM4
January 1, 2021 Update: My 1.34 Gbps benchmark was flawed. See this GitHub issue and this updated blog post to learn more: WiFi 6 is not faster than Ethernet on the Raspberry Pi. After buying three wireless cards, a new WiFi router, optimizing my process for cross-compiling the Linux kernel for the Raspberry Pi…
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Ignore AMP
In 2018, my recommendation was to avoid AMP, to use AMP for the most relevant pages, or to use AMP only. In 2020 my recommendation is to ignore it, because AMP largely appears meaningless now. <cite>Upgrade Your HTML II</cite> gives an opinionated idea why.
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TP-Link Archer VR1600V V2 Super User Password Cracked
Well the news is out, I won’t explain the method for reasons, but our code warriors have a new fight. After requesting the SU password, they were told flat out it doesn’t exist and refe…
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Amazon owns more than $2B worth of IPv4 addresses
Amazon owns almost 110M IPV4 addresses. At the lower end of the market price this is over $2B.
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72% of smart TVs and 46% of game consoles hardcode DNS settings
Welcome Hacker News readers!• Thank you to M. Hammad Mazhar for his research that inspired this guide.• @healyio made some great additional suggestions in th...
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Maybe we shouldn't want a fully decentralized web
Why I have stopped working with IPFS and the distributed web
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HTTP/2 Push is dead
One of the hot features that came with HTTP/2 was PUSH frames. The main idea is that if the server can predict what requests a client might want to make, the server can preemptively send request/response pairs to the client and warm its cache.
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Only distributed fact-checking can keep up with democratized distribution
Tragedy of the comments
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A look at Chang’e 5 telemetry
Chang’e 5 is a Chinese lunar sample return mission. It was launched a few days ago on 2020-11-23 from Wenchang and is estimated to perform lunar orbit injection on Saturday. Since then, a number of Amateurs such as USA Satcom , Paul Marsh M0EYT , Scott Tilley VE7TIL , Fer IW1DTU and others have been receiving the…
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TCP Performance problems related to Nagle’s Algorithm and Delayed ACK (2005)
This page describes a TCP performance problem resulting from a little-known interaction between Nagle’s Algorithm and Delayed ACK. At least, I believe it’s not well known: I haven’t seen it documented elsewhere, yet in the course of my career at Apple I have run into the performance problem it causes over and over…
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Another free CA as an alternative to Let's Encrypt
Let's Encrypt is an amazing organisation doing an amazing thing by providing certificates at scale, for free. The problem though was that they were the only such organisation for a long time, but I'm glad to say that the ecosystem is changing. It's always a good idea
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Ok Google: please publish your DKIM secret keys
The Internet is a dangerous place in the best of times. Sometimes Internet engineers find ways to mitigate the worst of these threats, and sometimes they fail. Every now and then, however, a major …
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Achieving 100Gbps intrusion prevention on a single server
Achieving 100 Gbps intrusion prevention on a single server, Zhao et al., OSDI’20 Papers-we-love is hosting a mini-event this Wednesday (18th) where I’ll be leading a panel discussion including one …
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Does Apple really log every app you run? A technical look
Apple’s launch of macOS Big Sur was almost immediately followed by server issues which prevented users from running third-party apps on their computers. While a workaround was soon found by people on Twitter, others raised some privacy concerns related to that issue.
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Using Matrix to replace proprietary and centralized chat apps
The website of Jae.
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OpenBSD Router Guide
NOTE: Currently this guide only deals with IPv4 as most people still don't use IPv6 and many ISPs also still only use IPv4, but IPv6 is planned for a future update of the guide.
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Monitor Airplane Traffic with a Raspberry Pi
Learn how to monitor airplane traffic with a Raspberry Pi. Track real-time flight data using PiAware and an ADS-B dongle. Simple setup for aviation enthusiasts!
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DKIM: Show Your Privates
If you’re like most people, there’s a good chance that it’s been years since you’ve sent an email that wasn’t cryptographically signed. You don’t use PGP, you say? Well, even if you are…
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NAT Slipstreaming
exploit NAT/firewalls to access TCP/UDP services bound to any system behind victim's NAT
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5Gbps Ethernet on the Raspberry Pi Compute Module 4
tl;dr: I successfully got the Intel I340-T4 4x Gigabit NIC working on the Raspberry Pi Compute Module 4, and combining all the interfaces (including the internal Pi interface), I could get up to 3.06 Gbps maximum sustained throughput. Update: I was able to boost things a bit to get 4.15 Gbps! Check out my video here…
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Twitter preconnects to the wrong domains
Twitter tried to reduce load times for external links, but made things slower instead. It mistakenly normalizes domains to a point where they’re no longer useful.
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Say goodbye to resource-caching across sites and domains
A look-back at caching strategies from the past; with recent changes in Chrome's and Safari's caching strategies, there is no caching benefit from using publicly available third-party libraries anymore.
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AWS NLBs and the mixed up TCP connections
One of my services was running into timeouts, because connections were being reset by clients. I had assumed that it couldn't be the Network Load Balancers (NLB