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ATProto for distributed system engineers
In this article we're going to explore atproto from the perspective of distributed backend engineering.
New
The latest blog posts to take off on Hacker News. 3,021 posts.
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Libations: Tailscale on the Rocks
A deep dive into my home grown cocktail recipe app which speaks Tailscale natively using tsnet, and serves up delicious drinks direct to your tailnet. Libations is built with Go, Nix and Vanilla Framework.
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gRPC: The Ugly Parts
The seedy underbelly of gRPC.
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How the Hourglass Won
The Internet's architecture is viewed as an hourglass: broad application support at the top, narrow waist (IP), wide choice of links below IP
515
I'm blocking connections from AWS to my on-prem services
The direct result of bulletproof infrastructure / cloud providers which are "too big to fail" is the balkanized internet . I don't think this has fully come to pass, but it might be starting to happen or might come to pass soon.
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Firewall rules: not as secure as you think
A post outlining tricks for firewall privilege escalation
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How I learned to stop worrying and love userspace networking
Userspace wireguard is fun!
518
Threads Enables Fediverse Replies
Last night Adam Mosseri, Head of Instagram, quitely announced the next step in the integration of Threads into the Fediverse. In addition to being able to follow Threads accounts from Fediverse/Mastodon accounts, we can now reply to and like Threads posts. Threads are taking a quiet, incremental approach to…
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Vulnerabilities show why STARTTLS should be avoided if possible (2021)
Guest Post: Study finds more than 40 STARTTLS-related security flaws in many different software products, both client-side and server-side.
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Is Telegram really an encrypted messaging app?
This blog is reserved for more serious things, and ordinarily I wouldn’t spend time on questions like the above. But much as I’d like to spend my time writing about exciting topics, som…
521
The journey of an internet packet: Exploring networks with traceroute
This article explains the mechanics behind traceroute, from IP headers and TTL fields to ICMP messages. Learn why traceroute is a crucial tool for network diagnostics, how it differs from ping, and how to interpret its output. Ideal for network administrators, IT professionals, and curious users looking to understand…
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Modern Wardriving (2023)
Let’s start by defining the word Wardriving: it is the search for WIFI wireless networks from a vehicle equipped with a computer. This would be the classic definition. I define modern wardriving as the search for WIFI networks, Bluetooth devices … Continue reading →
523
Ethernet History Deepdive – Why Do We Have Different Frame Types?
In my previous post Encapsulation of PDUs On Trunk Ports , I showed what happens to PDUs when you change the configuration of a trunk. You may have noticed that there are typically three different types of Ethernet encapsulations that we see:
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The spies in your home: How WiFi companies monitor your private life
Data harvesters are reaching into virtually every part of your digital life through the little-known surveillance hardware industry.
526
Transponder Landing System enables precision approaches at McMurdo in Antarctica
The ANPC transponder landing system at McMurdo station allows aircraft to land on the moving ice runway in poor weather or low visibility.
527
.INTERNAL is now reserved for private-use applications
Whereas, on 1 March 2019, the Board took action on each of the 35 recommendations issued within the Competition, Consumer Trust, and Consumer Choice (CCT) Review Team Final Report dated 8 September 2018, as specified within the scorecard titled " Final CCT Recommendations: Board Action (1 March 2019) ". The Board…
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Proton announces release of a new VPN protocol, "Stealth"
Stealth is a new VPN protocol from Proton VPN that overcomes censorship in restrictive countries.
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R5N - Obfuscated mesh routing on hostile networks.
This document contains the R 5 N DHT technical specification. R 5 N is a secure distributed hash table (DHT) routing algorithm and data structure for decentralized applications. It features an open peer-to-peer overlay routing mechanism which supports ad-hoc permissionless participation and support for topologies in…
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Threat actor abuses Cloudflare tunnels to deliver remote access trojans
Key findings Proofpoint has observed an increase in malware delivery via TryCloudflare Tunnel abuse. The activity is financially motivated and delivers exclusively remote
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Just disconnect the internet
So, let's say that a security vendor, we'll call them ClownStrike, accidentally takes down most of their Windows install base with a poorly tested content update. Rough day at the office, huh? There are lots of things you could say about this, lots of reasons it happens this way, lots of people to blame and not to…
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Was the Internet created to survive a nuclear strike? (2022)
Was the Internet Created for Nuclear War?
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Linux Network Performance Ultimate Guide
https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
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The New Internet
Tailscale's CEO, Avery Pennarun, explores the future of the internet, discussing the evolution of networking, the issues with today's complex systems, and how Tailscale is simplifying connectivity for developers with a new, more efficient approach. Discover the vision for a New Internet.
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"Doors" in Solaris: Lightweight RPC Using File Descriptors (1996)
A door is a "file" descriptor used to describe a procedure in a process and optionally some additional state associated with the procedure. Doors were initially designed as Spring object descriptors used to encapsulate the state and capabilities of C++ objects. A process which obtains a door is free to pass it, along…
536
The Linux audio stack demystified (and more)
Digital audio processing is a complex yet fascinating subject. Getting a deeper understanding requires knowledge in multiple technical disciplines, including physics, electrical/electronical engineering, and some software engineering when it comes to parts of the Linux ecosystem. This article aims to demystify the…
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Minuteman missile communications
A programming note: I am looking at making some changes to how I host things like Computers Are Bad and wikimap that are going to involve a lot more recurring expense. For that and other reasons, I want to see if y'all would be willing to throw some money my way. If everyone reading this gave $3 a month, we could…
538
Stop Microsoft users sending 'reactions' to email by adding a postfix header
Over the past few months, I’ve noticed that an increasing number of replies to email that I’ve sent are “reactions”.
539
Decoding DME aircraft radio navigation system with the LimeSDR
DME (distance measuring equipment) is an aircraft radio navigation system that is used to measure the distance between an aircraft and a DME station on ground. DME is often colocated with a VOR station, in which case the VOR provides the bearing information. DME works by measuring the two-way time of flight of pulse…
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Building the Bell System
If someone was making a list of the most important American companies today, it’s unlikely AT&T would be anywhere near the top.