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DEV Community • 2026-08-17 16:53

The Dangerous Docker Firewall Bypass (And How to Fix It Using UFW)

Every backend engineer and systems administrator knows the importance of running a solid firewall. You boot up a clean Ubuntu server instance, configure your UFW (Uncomplicated Firewall) rules to allow only port 80 and 443, block everything else by default, and feel completely secure. Then, you deploy a database or an internal admin dashboard inside a Docker container using a standard port mappin...

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DEV Community • 2026-08-17 16:45

Read Your AI Agent's Mind. OpenSearch Observability for LLM Traces.

You shipped your AI agent. It answers questions, calls tools, retrieves documents, and mostly does the right thing. Mostly. When it does the wrong thing, you have no idea why. The prompt looked fine. The retrieval seemed relevant. Somewhere between the user's question and the final answer, something went sideways, and you are staring at a log that says "200 OK" while your customer stares at nonsen...

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Hacker News: Front Page • 2026-08-17 16:45

Buy Your Friends Batteries

Article URL: https://domenkozar.com/2026/08/17/buy-your-friends-batteries/ Comments URL: https://news.ycombinator.com/item?id=49333932 Points: 3 # Comments: 2

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Hacker News: Front Page • 2026-08-17 16:37

Sun Clock

Article URL: https://sunclock.net/ Comments URL: https://news.ycombinator.com/item?id=49333824 Points: 5 # Comments: 1

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Hacker News • 2026-08-17 16:36

Show HN: AI Text Watermarking Playground

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DEV Community • 2026-08-17 16:36

Run AI-Proposed Shell Commands in a systemd Probe Before You Run Them for Real

Disclosure: This article was prepared as part of MonkeyCode's product outreach. A free model can produce shell commands that are syntactically valid but operationally unsafe, and the free server option gives you somewhere to stage them. The problem is not whether the command parses; it is whether the command's observable effect matches the intent. Why a command string needs a different g...

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𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-08-17 16:35

A from-scratch JSON engine for JavaScript: recursive descent parser, escape-aware tokenizer, and spec-compliant serializer. No dependencies, no shortcuts, 107 tests.

submitted by /u/Mantas_rst [link] [comments]

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Useful JavaScript Additions in ECMAScript 2026

Telerik Blogs • 2026-08-17 16:34

Useful JavaScript Additions in ECMAScript 2026

The useful part of the ECMAScript 2026 standard for JavaScript developers is not a dramatic change to the language. It is that several common use cases now have direct names.

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𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-08-17 16:34

A regex engine built from scratch in vanilla JavaScript — a hand-written parser and a backtracking matcher. No native RegExp, no dependencies.

submitted by /u/Mantas_rst [link] [comments]

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Hacker News: Front Page • 2026-08-17 16:31

GitHub Has an Availability Problem. Is It Time to Look Elsewhere?

Article URL: https://dhruv2038.bearblog.dev/github-has-an-availability-problem-is-it-time-to-look-elsewhere/ Comments URL: https://news.ycombinator.com/item?id=49333728 Points: 28 # Comments: 3

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DEV Community • 2026-08-17 16:30

Java Introduction: What Is Java, Who Created It, and How Sun Microsystems Became Oracle?

Part of my Java Learning Series — Telusko Core Java If you are starting to learn Java, you will probably hear names such as James Gosling, Sun Microsystems, Oak, Oracle, JVM, and Java very frequently. At first, these names can feel confusing. I personally found it easier to understand Java after learning not only the syntax, but also where Java came from, why it was created, and what happened...

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LogRocket Blog • 2026-08-17 16:27

How to build AI-ready Nuxt apps in 2026

Learn how to build and deploy production-ready AI streaming applications in Nuxt using the Vercel AI SDK, Nuxt UI chat components, and Cloudflare Workers AI at the edge. The post How to build AI-ready Nuxt apps in 2026 appeared first on LogRocket Blog.

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Newest questions tagged reactjs - Stack Overflow • 2026-08-17 16:24

Next.js hydration mismatch error when rendering dynamic data from an API

I am working on a Next.js application where I am fetching dynamic data from an external API, but I am encountering a hydration mismatch error during the initial page render. What I want to achieve: I want to render the fetched API data seamlessly on the client side without triggering any server/client DOM mismatch warnings in the console. What I have tried: Using useEffect to fetch data on the cl...

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DEV Community • 2026-08-17 16:23

What I Learned Shipping My First Chrome Extension to the Web Store

I spent the last few months building and shipping a Chrome extension called Promo Drop, a free tool that finds verified promo codes and cashback for products on Whop. It is live on the Chrome Web Store now. This is a write-up of what I learned getting it there, minus the one part I cannot share (more on that below). Quick background on me: I studied at Lancaster University, spent a while day trad...

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DEV Community • 2026-08-17 16:20

QUASAR: How Saliency-Weighted Reconstruction Closes the Loss Floor Gap in LLM Quantization-Aware Training

QUASAR: How Saliency-Weighted Reconstruction Closes the Loss Floor Gap in LLM Quantization-Aware Training Quantization is one of the most practical tools in the LLM deployment toolkit. Shrinking a model from 16-bit to 4-bit or even 2-bit precision can cut memory requirements by 4–8×, making it possible to run large models on consumer hardware, edge devices, or cost-constrained cloud ins...

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DEV Community • 2026-08-17 16:14

Overview of the RTOS Kernel Project

In previous tutorial, I've gave you the theoretical background about ARM Cortex-M3/4 processors. In here, I will explain the RTOS kernel project structure. You can access and inspect the kernel implementation from here. The project gives the end-to-end development environment for STM32F446RE with the builtin kernel. I've built a statically allocated and fully preemptive kernel. For now, it's ju...

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Lobsters • 2026-08-17 16:13

A Preview of DuckDB v2.0

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CSS Wizardry • 2026-08-17 16:11

When Safari’s ‘Ignore Cache’ Ignored Cache-Control

Safari Technology Preview 250 fixed a subtle Web Inspector bug that overwrote page-authored Cache-Control request headers when the resource cache was disabled.

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Hacker News: Front Page • 2026-08-17 16:11

Judge sets framework for Nine PBS to retrieve archival data

Article URL: https://current.org/2026/08/judge-sets-framework-for-nine-pbs-to-retrieve-archival-data/ Comments URL: https://news.ycombinator.com/item?id=49333344 Points: 11 # Comments: 0

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DEV Community • 2026-08-17 16:07

The Ecology of Engineering Teams

Over the past several weeks, I've introduced five engineering archetypes that I've encountered throughout my career: The Gardener The Mason The Blacksmith The Bear Killer The Chef If you've read the series from the beginning, you may have noticed something. I never intended these articles to become a personality framework. They're certainly not a hiring rubric, and they aren't meant to suggest...

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