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MQTT turns 25
October 2024 marks the 25th anniversary of MQTT, a crucial protocol for connecting devices in diverse environments. With origins in lightweight networks, MQTT has flourished, empowering countless a…
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 198 posts.
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Why can't my mom email me?
Proton email keeps sending my non-Proton email accounts encrypted emails. I figure out why and show you how to turn it off.
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Facebook building subsea cable that will encompass the world
Facebook building subsea cable that will span the globe. Biggest project ever.
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Sysadmin friendly high speed Ethernet switching
I’ve been on the lookout for a ethernet switch that I don’t hate, the problem with a lot of higher speed (10G and above) ethernet switches is that they are quite expensive new and if you buy the used then they rarely have many years left ( or none at all ) of software patches.
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Making a Linux-managed network switch
Sometimes the custom 5-port gigabit switch _is_ the solution.
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HTTP/2 and HTTP/3 explained
Understand better how HTTP works in each version.
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A Day in the Life: The Global BGP Table
Update: This article was discussed on Hackernews Much has been written and a lot of analysis performed on the global BGP table over the years, a significant portion by the inimitable Geoff Huston.
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Critical Exploit in MediaTek Wi-Fi Chipsets: Zero-Click Vulnerability
a post going over 4 exploits for CVE-2024-20017, a remotely exploitable buffer overflow in a component of the MediaTek MT7622 SDK.
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How to copy a file between devices? (2022)
Introduction Copying a file across devices is painful. You’re on your phone, but you want to access a file that’s on your laptop. How do you do it? What about the other way around? What about copying any file between any of your devices? I asked my dad how he copies a file from his phone to his computer, and he…
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How Does Bluesky Work?
One of the reasons I am enthusiastic about BlueSky is because of the way that it works. So in this post, I am going to lay out some of the design and the…
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Reclaiming IPv4 Class E's 240.0.0.0/4
Ever since the supply of fresh IPv4 address blocks was depleted there has been a number of interesting market changes, mostly around the costs to either acquire or lease IPv4 address blocks. Since the demand for IPv4 addressing has not changed that much, prices have gone up, and more providers like AWS, Hetzner, OVH…
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About the Tailscale.com outage on March 7, 2024
On March 7, 2024, tailscale.com was unavailable for approximately 90 minutes due to an expired TLS certificate. We were able to identify and address the issue quickly, and the downtime was mostly limited to our marketing materials and documentation; still, we would like to explain exactly what happened, what the…
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epoll: The API that powers the modern internet (2022)
Linux's epoll API solved the C10K problem, enabling fast and afforable Internet services.
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"BGP at home": getting a DIA circuit installed at home
The infrastructure underlying AS54316 -- the network supporting the services offered by the AP Foundation -- has historically been based out of a datacenter in NYC (NetActuate in Telehouse Chelsea). To add some resiliency, I thought it'd be interesting -- and a potentially fun challenge -- to leverage some spare real…
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Consuming the Bluesky firehose for less than $2.50/mo
*without doing much with it (and maybe not for long at its current growth rate)
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IBDNS: Intentionally Broken DNS server
Afnic, the association in charge of the .fr top-level domain and several other French overseas and generic TLDs, announced today the release as free software of its tool named IBDNS, standing for Intentionally Broken DNS.
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Some Fritz!Box modems might have been hijacked
TL;DR: Fritz!Box devices using custom DNS resolution services like Pihole or Adguard might have been compromised by DNS hijacking and using those Fritz!Box devices might be unsafe, especially for Windows users. Update: I updated the article to downscale the severity of the situation. After posting the article on HN, I…
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usbredir: A protocol for sending USB device traffic over a network connection
usbredir is the name of a network protocol for sending USB device traffic over a network connection. It is also the name of the software package offering a parsing library, a usbredirhost library and several utilities implementing this protocol.
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Sans-IO: The secret to effective Rust for network services
Learn how Firezone uses the sans-IO pattern to build testable, deterministic Rust networking code. A deep dive into our connlib design.
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The Influence of Bell Labs
We’ve talked previously about Bell Labs’ long, storied history as an innovation engine and a generator of new technology.
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The Nearest Neighbor Attack
In early February 2022, notably just ahead of the Russian invasion of Ukraine, Volexity made a discovery that led to one of the most fascinating and complex incident investigations Volexity had ever worked. The investigation began when an alert from a custom detection signature Volexity had deployed at a customer site…
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gRPC: The Bad Parts
gRPC isn't perfect but who is?
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The IPv6 Transition
I wrote an article in May 2022, asking “Are we there yet?” about the transition to IPv6. At the time I concluded the article on an optimistic note, observing that we may not be ending the transition just yet, but we are closing in. I thought at the time that we won’t reach the end of this transition to IPv6 with a…
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We improved the performance of a userspace TCP stack in Go
Learn how we enhanced TCP performance in Coder to achieve 5X faster throughput by optimizing buffer sizes, implementing the HyStart algorithm, and minimizing packet loss, significantly improving remote development experiences.
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Not all TLDs are Created Equal
In light of the recent cancellation of the queer.af domain registration by the Taliban , the fragile and difficult nature of country-code top-level domains (ccTLDs) has once again been comprehensively demonstrated. Since many people may not be aware of the risks, I thought I’d give a solid explainer of the whole…
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FIDO Alliance publishes new spec to let users move passkeys across providers
The FIDO Alliance has published a working draft of a new set of specifications for secure credential exchange that, when standardized and implemented by
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Was the Internet created to survive a nuclear strike? (2022)
Was the Internet Created for Nuclear War?