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Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 3,021 posts.
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DKIM Demystified
DKIM is a way to secure your email, increasing deliverability and avoiding fraud. A 20i Senior Systems Administrator explains DKIM in depth.
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Signal intelligence 101: SIGINT targets
A quick overview of the various types of signal intelligence targets, with an emphasis on the Soviet Cold War systems
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New LoRa RF distance record
The long term LoRaWAN® distance world record of 832 km / 517 mi has been broken. The new record now stands at 1336 km / 830 miles. After 3 years, the new world
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The UK has an entire IPv4 /8 that it isn't using
IMPORTANT UPDATES BELOW If you take a look at the list of IPv4 allocated /8 blocks there's one interesting block in there: 51.0.0.0/8 ...
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Google's Subsea Fiber Optics
Fiber optic networks are a foundation of the modern internet. In fact, subsea cables carry 99% of international network traffic , and yet we are barely aware that they exist. What you might not know is that the first subsea cable was deployed in 1858 for telegraph messages between Europe and North America. A message…
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Ultrasonic Payments
Experimenting with ultrasonic data transmission in JavaScript as a payment method.
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Peer-to-peer social networking with Rotonde and Beaker
A short introduction to p2p social networking with Rotonde & Beaker Browser.
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The Miserable State of Modems and Mobile Network Operators
This is a story of the complexities of cellular connectivity, the perils of closed ecosystems, and how to debug what you cannot see.
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Starlink in the Falkland Islands – A national emergency situation?
In yesterday’s (Thursday) OpenFalklands blog, I noted that while a week may seem long in politics, even a single day can feel like an eternity […] Read More
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NAT Is the Enemy of Low Power Devices
If you have ever tried communicating with a device on a private network, you may have encountered Network Address Translation (NAT). Because the number of connected devices has long outpaced the number of unique addresses in the IPv4 address space, public IP addresses have to be shared between devices. This introduces…
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IPv6 privacy addresses crashed the MIT CSAIL network
A few hours ago, I sent the following “dear colleagues” email (lightly edited to remove some private details) to all my users at work: This has been a very trying week. For those of you…
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Net Neutrality will die, so let’s take the profit out of killing it
Fighting the FCC is futile at this point, but Bob has a way to (in a way) save Net Neutrality
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Police CyberAlarm Uses Alarming Cryptography
Today we’re going to be talking about this code, shared on Twitter by Paul Moore. It’s worth noting that this code snippet was after Paul attempted to alert them to security issues with…
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Incenser, or how NSA and GCHQ are tapping internet cables (2014)
A weblog about Signals Intelligence, Communications Security and top level telecommunications equipment
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Remembering the LAN (2020)
Learn more about the early days of LAN.
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LoRaWAN packet received at record distance of 702 km
With the rise of novel wireless technologies, we surprise ourselves over and over again of what these technologies are capable of. LoRa has been around now for
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Blackholing My Email
How Counter-Strike map credits led to my email address being harvested by worms, and why I had to ask my ISP to blackhole it.
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HTTP Caching, a Refresher
Let’s relearn web caching together.
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Computer Networking Fundamentals – Learning Series (2023)
This colorful series walks you through the networking basics in just a few thousand words! It also offers hands-on labs to practice the obtained knowledge.
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How Cloudflare analyzes 1M DNS queries per second
On Friday, we announced DNS analytics for all Cloudflare customers. Because of our scale –– by the time you’ve finished reading this, Cloudflare DNS will have handled millions of DNS queries –– we had to be creative in our implementation.
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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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Bypassing the Linux kernel for high-performance packet filtering
In two previous posts we've discussed how to receive 1M UDP packets per second and how to reduce the round trip time. We did the experiments on Linux and the performance was very good considering it's a general purpose operating system.
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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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Complete, Persistent Compromise of Netgear Wireless Routers
UPDATE: Turns out, Jacob Holocomb ( @rootHak42 on Twitter) of Independent Security Evaluators found this bug back in April on a different d...