This technical post walks through the design and implementation of Secure Playground: a local web app that simulates prompt-injection attacks against large language models and demonstrates simple defenses. Provide a minimal, reproducible environment to test payloads and defensive strategies. Make it easy to add new providers and run mutation-based red-team experiments. Offer a leaderboard and scor
Metasploitable2 - FTP Exploitation using vsftpd 2.3.4 Backdoor 1. Objective To identify and exploit a known vulnerability in an FTP service running on a vulnerable target machine using industry-standard reconnaissance and exploitation techniques. 2. Lab Environment Component Description Attacker Machine Kali Linux Target Machine Metasploitable2 Network Type Host-only / NAT
This is Part 1 of a two-part series. Part 2 (coming soon): Connecting to spoke clusters from a controller using multicluster-runtime, driven by ClusterProfile. The Cluster Inventory API (multicluster.x-k8s.io) is driven by SIG-Multicluster and centered on the ClusterProfile resource. It only delivers value when something produces those ClusterProfiles. That something is a cluster manager. Today, t
When developers travel, we usually prepare the obvious things. Laptop charger. But there is one dependency that is easy to underestimate until it breaks: mobile internet. A trip to China makes this especially obvious. Not because China is hard to travel in, but because so many basic interactions are mobile-first: navigation, translation, ride-hailing, hotel communication, ticket confirmations, pay
We've been there. JSON Schema gets hard to write as soon as your payload is non-trivial. Conditional logic, cross-field rules, business invariants, and at some point we stop writing contracts at all. We go code-first, generate the schema from annotations, and end up with 200 lines very few understand, and error messages referencing paths like #/properties/items/allOf/0/then/Then that map to nothin
Three times in a decade. That's how often a Linux copy-primitive bug has blown a hole through container isolation. In 2016 it was Dirty COW. In 2024 it was Leaky Vessels. In 2026, a new class of Linux copy-primitive bugs is proving, again, that containers share a kernel. And that kernel keeps betraying them. The pattern is hard to ignore. Bugs in how the Linux kernel copies, references, or manages
You write a Dockerfile, run docker build, and get an image. But what’s really happening under the hood? Docker isn’t just “building” your app — it’s assembling a stack of immutable filesystem layers. Docker doesn’t build applications — it builds filesystem snapshots layer by layer. Let’s break it down. A Docker image is not a single file. stack of read-only layers. Every instruction in your Docker
Originally published on graycloudarch.com. You just merged a PR. Now you open Jira, find the ticket, paste the PR link in a comment, transition the status to Done, and update the deployed field. Five minutes. Twenty times a week. That's 1,700 minutes per year per engineer — nearly 30 hours of pure mechanical overhead. And that's assuming you remember. On one team I worked with, we audited the last