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Implementing fast TCP fingerprinting with eBPF

news.ycombinator.com Unknown 2025-09-09 12:59:26

In this article I want to document my journey implementing fast TCP fingerprinting in a golang webserver, using eBPF. Just to provide some background, TCP fingerprinting is one of the many techniques that can be used to detect unusual or identifying informations about a web request when implementing an anti-bot solution. This has been a hot topic lately, caused by the rising need to scrape the internet for human content to feeed to the LLMs. Implementing such a system offers interesting techn

Topics: client connection ebpf packet tcp

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Performance Debugging with LLVM-mca: Simulating the CPU

news.ycombinator.com Ivica Bogosavljević 2025-09-09 15:41:09

Some time ago I had a performance problem that wasn’t easy to explain by just looking at the code, since the version I expected to be faster was actually slower. Since the problem is simple yet illustrative, I am using it as a showcase on how to debug performance issues using llvm-mca. According to it’s documentation llvm-mca is a performance analysis tool that uses information available in LLVM (e.g. scheduling models) to statically measure the performance of machine code in a specific CPU. In

Topics: 4s execution instruction load version

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Bloom Filters by Example

news.ycombinator.com Unknown 2025-09-09 13:56:09

Bloom Filters by Example A Bloom filter is a data structure designed to tell you, rapidly and memory-efficiently, whether an element is present in a set. The price paid for this efficiency is that a Bloom filter is a probabilistic data structure: it tells us that the element either definitely is not in the set or may be in the set. The base data structure of a Bloom filter is a Bit Vector. Here's a small one we'll use to demonstrate: Each empty cell in that table represents a bit, and the nu

Topics: bloom filter functions hash set

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Show HN: Octelium – FOSS Alternative to Teleport, Cloudflare, Tailscale, Ngrok

news.ycombinator.com Unknown 2025-09-09 13:24:17

Octelium Table of Contents What is Octelium? Octelium is a free and open source, self-hosted, unified platform for zero trust resource access that is primarily meant to be a modern alternative to remote access VPNs and similar tools. It is built to be generic enough to not only operate as a zero-config remote access VPN (i.e. alternative to OpenVPN Access Server, Twingate, Tailscale, etc...), a ZTNA platform (i.e. alternative to Cloudflare Access, Teleport, Google BeyondCorp, etc...), a sca

Topics: access aware based cluster octelium

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Gradient Descent Visualiser

news.ycombinator.com Unknown 2025-09-06 03:10:49

👋 Hey there! Let's play with gradient descent. This mini-app acts as an interactive supplement to Teach LA's curriculum on linear regression and gradient descent. Not sure what's going on? Check out the lesson notebook and the corresponding slides.

Topics: acts app corresponding descent gradient

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CTGT wins Best Presentation Style award at VB Transform 2025

venturebeat.com James Thomason 2025-09-08 17:48:46

Join the event trusted by enterprise leaders for nearly two decades. VB Transform brings together the people building real enterprise AI strategy. Learn more San Francisco-based CTGT, a startup focused on making AI more trustworthy through feature-level model customization, won the Best Presentation Style award at VB Transform 2025 in San Francisco. Founded by 23-year-old Cyril Gorlla, the company showcased how its technology helps enterprises overcome AI trust barriers by directly modifying mo

Topics: ai company ctgt gorlla model

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The Book Cover Trend of Text on Old Paintings

news.ycombinator.com Elisabeth Egan 2025-09-06 09:46:20

Like fashion trends, fads in book covers come and go. One year, the backs of women’s heads might be all the rage; the next, soft focus photography. And who can forget the exploding flower craze? Or the proliferation of flames on jackets, from thrillers to science fiction to self-help? But the look that’s commanding today’s runways — a.k.a. bookshelves — is not so incendiary. It tends to lay blaringly bright type in a sans-serif font atop a painting, usually a few centuries old but not always. F

Topics: art book covers fiction type

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Today's NYT Connections Hints, Answers and Help for June 29, #749

cnet.com See Full Bio 2025-09-09 13:00:02

Looking for the most recent Connections answers? Click here for today's Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections: Sports Edition and Strands puzzles. Today's NYT Connections puzzle could be tough. There's a very 1980s phrase in it and I had no idea where to put it. Even now, I'm going to have to Google it within its category to find out what it means. (It's this.) Read on for clues and today's Connections answers. The

Topics: answers connections group today words

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Today's NYT Connections: Sports Edition Hints and Answers for June 29, #279

cnet.com See Full Bio 2025-09-09 13:00:05

Looking for the most recent regular Connections answers? Click here for today's Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles. Today's Connections: Sports Edition might be tough. But all you Hoosiers will nail the yellow category, I think. Read on for hints and the answers. Connections: Sports Edition is out of beta now, making its debut on Super Bowl Sunday, Feb. 9. That's a sign that the game has earned enough loya

Topics: answers connections group sports today

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I tested the Garmin Vivoactive 6 and Apple Watch SE, and I still prefer Garmin as a gym mate

androidauthority.com Unknown 2025-09-09 11:00:02

Kaitlyn Cimino / Android Authority The Apple Watch SE is the blueprint for what most people expect from a smartwatch: a clean design, deep smartphone integration, and enough wellness tracking features to stay reasonably healthy. At a reduced price compared to the brand’s flagship lineup, the SE is also accessible. However, with the launch of the Vivoactive 6, Garmin seems to be stepping up to the plate with a potential competitor. After testing both watches side by side, it’s clear Garmin isn’

Topics: apple garmin se vivoactive watch

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LLMs Bring New Nature of Abstraction

news.ycombinator.com Martin Fowler 2025-09-06 08:55:14

Like most loudmouths in this field, I've been paying a lot of attention to the role that generative AI systems may play in software development. I think the appearance of LLMs will change software development to a similar degree as the change from assembler to the first high-level programming languages. The further development of languages and frameworks increased our abstraction level and productivity, but didn't have that kind of impact on the nature of programming. LLMs are making that degree

Topics: abstraction fortran languages level non

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Parsing JSON in Forty Lines of Awk

news.ycombinator.com Mohamed Akram 2025-09-09 13:23:48

JSON is not a friendly format to the Unix shell — it’s hierarchical, and cannot be reasonably split on any character (other than the newline, which is not very useful) as that character might be included in a string. There are well-known tools such as jq that let you correctly parse JSON documents in the shell, but all require an additional dependency. Another option is to use Python, which is ubiquitous enough that it can be expected to be installed on virtually every machine, and for new proje

Topics: json key object substr type

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This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

gizmodo.com Ellyn Lapointe 2025-09-09 10:00:05

When piecing together the cultural practices of ancient humans, traditional archaeologists rely on clues from artifacts such as tools, bones, and pottery. Experimental archaeologists, however, go a step further—recreating past behaviors to experience how people once lived. That’s precisely what a team of researchers recently did to investigate how Stone Age communities in northeastern Europe extracted animal teeth to produce accessories. Led by Aija Macāne, a visiting scholar in the Department

Topics: extraction methods researchers teeth used

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Robotic sucker can adapt to surroundings like an actual octopus

arstechnica.com Unknown 2025-09-09 09:00:02

Some of the most ingenious tech has been inspired by nature. From color-changing materials that function like cephalopod skin to a tiny biomimetic robot that looks and moves like an actual cockroach, the extraordinary adaptations of some organisms have upgraded our technological capabilities. Now the octopus is lending an arm—or a sucker. Octopus tentacles have remarkably strong suckers with an adhesion power that could be an asset to soft robots that need to pick things up and hold onto them.

Topics: mucus octopus sucker suckers surface

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The 24 Best Movies on Amazon Prime Right Now (July 2025)

wired.com Matt Kamen 2025-09-09 09:00:00

In Recent years, Netflix and Apple TV+ have been duking it out to have the most prestigious film offerings, but some of the best movies are on Amazon Prime Video. The streamer was one of the first to go around picking up film festival darlings and other lovable favorites, and they’re all still there in the library, so if they flew under your radar the first time, now is the perfect time to catch up. Our picks for the best movies on Amazon Prime are below. All the films in our guide are included

Topics: america best director film life

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LLMs bring new nature of abstraction – up and sideways

news.ycombinator.com Martin Fowler 2025-09-05 17:52:05

Like most loudmouths in this field, I've been paying a lot of attention to the role that generative AI systems may play in software development. I think the appearance of LLMs will change software development to a similar degree as the change from assembler to the first high-level programming languages. The further development of languages and frameworks increased our abstraction level and productivity, but didn't have that kind of impact on the nature of programming. LLMs are making that degree

Topics: abstraction fortran languages level non

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Catio wins ‘coolest tech’ award at VB Transform 2025

venturebeat.com Leon Yen 2025-09-09 13:34:26

Join the event trusted by enterprise leaders for nearly two decades. VB Transform brings together the people building real enterprise AI strategy. Learn more Palo Alto-based Catio was awarded “Coolest Technology” at VentureBeat Transform 2025 in San Francisco on Wednesday. Founded in 2023, the company has raised $7 million to date, with a recent $3 million round announced in March. Catio was also a finalist and presented at VB Transform’s Innovation Showcase in 2024. Catio’s AI Copilot for Tec

Topics: ai architecture catio tech transform

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Anker issues new global recall for five power bank models over fire hazard

9to5mac.com Marcus Mendes 2025-09-09 13:36:17

Just days after issuing a voluntary recall for the Anker PowerCore 10000, the company has now issued a second, broader recall, this time with global reach and five additional power bank models affected. Anker says the move is a proactive step following recent improvements to its internal quality assurance systems. While the company claims the risk of malfunction is low, it’s recalling the affected models “out of an abundance of caution.” All five power banks flagged in the recall use lithium-io

Topics: affected anker bank model power

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Rust in the Linux kernel: part 2

news.ycombinator.com Unknown 2025-09-09 21:07:03

How to write Rust in the kernel: part 2 [LWN subscriber-only content] In 2023, Fujita Tomonori wrote a Rust version of the existing driver for the Asix AX88796B embedded Ethernet controller. At slightly more than 100 lines, it's about as simple as a driver can be, and therefore is a useful touchstone for the differences between writing Rust and C in the kernel. Looking at the Rust syntax, types, and APIs used by the driver and contrasting them with the C version will help illustrate those diffe

Topics: driver function kernel phy rust

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The amazing XGIMI Horizon Pro 4K projector is at a record-low price!

androidauthority.com Unknown 2025-09-10 01:19:34

There are plenty of great portable projectors around these days, and prices are getting more accessible than ever. While those work great, we know many of you are much more demanding viewers. High-end projectors can get really pricey, but here’s an option for those who want the ultimate TV replacement at a more reasonable price. The XGIMI Horizon Pro 4K is at a record-low price, saving you over $900! Buy the XGIMI Horizon Pro 4K for just $769.99 ($929.01 off) This offer is available from Woot!,

Topics: 4k 99 deal projector really

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Glass nanostructures reflect nearly all visible light, challenging assumptions

news.ycombinator.com Singapore University Of Technology 2025-09-06 16:23:48

This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: Nanoscale 3D printing of glass. Credit: Science Advances (2025). DOI: 10.1126/sciadv.adv0267 A research team led by SUTD has created nanoscale glass structures with near-perfect reflectance, overturning long-held assumptions about what low-index materials can do in photonics. For decades, glass has been a reliable

Topics: glass light nanoscale photonic reflectance

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‘The Old Guard 2’ Cast on Making a Sequel That Bleeds, Thinks, and Fights Harder

gizmodo.com Isaiah Colbert 2025-09-10 01:45:25

On July 2, Netflix and Skydance will finally unleash The Old Guard 2, the long-awaited sequel to the 2020 action hit starring Charlize Theron as an immortal warrior protecting humanity. Ahead of the release, io9 caught up with returning stars KiKi Layne, Chiwetel Ejiofor, and Marwan Kenzari, as well as franchise newcomer Henry Golding (Crazy Rich Asians, Snake Eyes), to talk about stepping back into the brutal, secretive world of the Image Comics universe and what it took to bring its next chapt

Topics: action choreography io9 kenzari think

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Scaling smarter: How enterprise IT teams can right-size their compute for AI

venturebeat.com Joe Maglitta 2025-09-10 05:00:00

This article is part of VentureBeat’s special issue, “The Real Cost of AI: Performance, Efficiency and ROI at Scale.” Read more from this special issue. AI pilots rarely start with a deep discussion of infrastructure and hardware. But seasoned scalers warn that deploying high-value production workloads will not end happily without strategic, ongoing focus on a key enterprise-grade foundation. Good news: There’s growing recognition by enterprises about the pivotal role infrastructure plays in e

Topics: ai cloud hardware infrastructure said

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The inference trap: How cloud providers are eating your AI margins

venturebeat.com Shubham Sharma 2025-09-10 05:00:00

This article is part of VentureBeat’s special issue, “The Real Cost of AI: Performance, Efficiency and ROI at Scale.” Read more from this special issue. AI has become the holy grail of modern companies. Whether it’s customer service or something as niche as pipeline maintenance, organizations in every domain are now implementing AI technologies — from foundation models to VLAs — to make things more efficient. The goal is straightforward: automate tasks to deliver outcomes more efficiently and s

Topics: ai cloud costs inference infrastructure

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Normalizing Flows Are Capable Generative Models

news.ycombinator.com Unknown 2025-09-10 05:50:10

Normalizing Flows (NFs) are likelihood-based models for continuous inputs. They have demonstrated promising results on both density estimation and generative modeling tasks, but have received relatively little attention in recent years. In this work, we demonstrate that NFs are more powerful than previously believed. We present TarFlow: a simple and scalable architecture that enables highly performant NF models. TarFlow can be thought of as a Transformer-based variant of Masked Autoregressive Fl

Topics: architecture autoregressive flows models tarflow

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Today's NYT Connections: Sports Edition Hints and Answers for June 28, #278

cnet.com See Full Bio 2025-09-10 05:00:06

Looking for the most recent regular Connections answers? Click here for today's Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles. Today's Connections: Sports Edition has some oddball categories that I wouldn't really consider sports. They're more like games, and hobbies or leisure activities. But you get the idea. Read on for hints and the answers. Connections: Sports Edition is out of beta now, making its debut on Supe

Topics: answers connections group sports today

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Today's NYT Connections Hints, Answers and Help for June 28, #748

cnet.com See Full Bio 2025-09-10 05:00:07

Looking for the most recent Connections answers? Click here for today's Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle, Connections: Sports Edition and Strands puzzles. Today's NYT Connections puzzle could be tough. Just remember, sometimes last names can disguise themselves as regular nouns. Read on for clues and today's Connections answers. The Times now has a Connections Bot, like the one for Wordle. Go there after you play to receive

Topics: answers connections group today words

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Kumo’s ‘relational foundation model’ predicts the future your LLM can’t see

venturebeat.com Ben Dickson 2025-09-10 09:40:12

Join the event trusted by enterprise leaders for nearly two decades. VB Transform brings together the people building real enterprise AI strategy. Learn more The generative AI boom has given us powerful language models that can write, summarize and reason over vast amounts of text and other types of data. But when it comes to high-value predictive tasks like predicting customer churn or detecting fraud from structured, relational data, enterprises remain stuck in the world of traditional machin

Topics: ai customer data kumo predictive

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Slightly better named character reference tokenization than Chrome, Safari, FF

news.ycombinator.com Ryan Liptak 2025-09-09 14:27:26

Slightly better named character reference tokenization than Chrome, Safari, and Firefox 2025-06-26 Note: I am not a 'browser engine' person, nor a 'data structures' person. I'm certain that an even better implementation than what I came up with is very possible. A while back, for no real reason, I tried writing an implementation of a data structure tailored to the specific use case of the Named character reference state of HTML tokenization (here's the link to that experiment). Recently, I to

Topics: array benchmark character implementation named

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Trump’s ‘big beautiful bill’ could mean slower Wi-Fi for you

theverge.com Jennifer Pattison Tuohy 2025-09-10 09:28:12

The Senate version of the budget reconciliation bill, backed by President Donald Trump, removes protections for unlicensed spectrum that broadens the capacity of the 6GHz Wi-Fi band. This could result in slower Wi-Fi speeds. Under the bill, which may be voted on at the end of this week, the FCC would sell off some of that spectrum to mobile carriers such as AT&T, which could use it to improve the speed of their mobile data. The bill includes a provision requiring the FCC to auction 800MHz of sp

Topics: 6ghz band fi spectrum wi

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Latest Tech News

Implementing fast TCP fingerprinting with eBPF

Performance Debugging with LLVM-mca: Simulating the CPU

Bloom Filters by Example

Show HN: Octelium – FOSS Alternative to Teleport, Cloudflare, Tailscale, Ngrok

Gradient Descent Visualiser

CTGT wins Best Presentation Style award at VB Transform 2025

The Book Cover Trend of Text on Old Paintings

Today's NYT Connections Hints, Answers and Help for June 29, #749

Today's NYT Connections: Sports Edition Hints and Answers for June 29, #279

I tested the Garmin Vivoactive 6 and Apple Watch SE, and I still prefer Garmin as a gym mate

LLMs Bring New Nature of Abstraction

Parsing JSON in Forty Lines of Awk

This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

Robotic sucker can adapt to surroundings like an actual octopus

The 24 Best Movies on Amazon Prime Right Now (July 2025)

LLMs bring new nature of abstraction – up and sideways

Catio wins ‘coolest tech’ award at VB Transform 2025

Anker issues new global recall for five power bank models over fire hazard

Rust in the Linux kernel: part 2

The amazing XGIMI Horizon Pro 4K projector is at a record-low price!

Glass nanostructures reflect nearly all visible light, challenging assumptions

‘The Old Guard 2’ Cast on Making a Sequel That Bleeds, Thinks, and Fights Harder

Scaling smarter: How enterprise IT teams can right-size their compute for AI

The inference trap: How cloud providers are eating your AI margins

Normalizing Flows Are Capable Generative Models

Today's NYT Connections: Sports Edition Hints and Answers for June 28, #278

Today's NYT Connections Hints, Answers and Help for June 28, #748

Kumo’s ‘relational foundation model’ predicts the future your LLM can’t see

Slightly better named character reference tokenization than Chrome, Safari, FF

Trump’s ‘big beautiful bill’ could mean slower Wi-Fi for you

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