https://karl.fail/Security research, self-hosting and homelabenhttps://karl.fail/blog/ultimate-guide-to-self-hosted-dynamic-dns-ditch-duckdns-for-karldns/https://karl.fail/blog/ultimate-guide-to-self-hosted-dynamic-dns-ditch-duckdns-for-karldns/Fri, 22 May 2026 15:11:04 GMTStop dealing with expiring hostnames and insecure API tokens. Learn how to deploy KarlDNS, a secure, account-free, self-hosted DynDNS using FastAPI, SQLite…https://karl.fail/blog/how-i-built-a-sub-millisecond-threat-intelligence-api-for-0/https://karl.fail/blog/how-i-built-a-sub-millisecond-threat-intelligence-api-for-0/Mon, 11 May 2026 05:00:00 GMTHow I built a free, sub-millisecond threat intelligence API using Node-RED to identify malicious IPs and domains. Stop paying vendors for open-source data.https://karl.fail/blog/the-great-karlflix-migration-moving-my-media-stack-to-a-proxmox-lxc/https://karl.fail/blog/the-great-karlflix-migration-moving-my-media-stack-to-a-proxmox-lxc/Fri, 08 May 2026 06:16:57 GMTMeta Description: Learn how I migrated my bloated Debian VM media stack to a sleek Proxmox LXC, enabling Jellyfin hardware transcoding, Gluetun WireGuard, and SSO.https://karl.fail/blog/claude-sysadmin-an-ai-guide-for-the-exceptionally-lazy/https://karl.fail/blog/claude-sysadmin-an-ai-guide-for-the-exceptionally-lazy/Tue, 05 May 2026 20:36:45 GMTToo lazy for homelab chores? Learn how I used AI tools like Claude as my personal SysAdmin to automate Proxmox updates, fix WordPress, and refactor UniFi firewalls.https://karl.fail/blog/i-spent-250e-on-ai-pentesting-agents-pentagi-strix-xalgorix/https://karl.fail/blog/i-spent-250e-on-ai-pentesting-agents-pentagi-strix-xalgorix/Tue, 28 Apr 2026 07:35:02 GMTCurious if autonomous AI pentesting actually works? I spent 200€ on OpenAI and Claude APIs to test PentAGI, Strix, and Xalgorix. Read my real-world…https://karl.fail/blog/monitoring-your-personal-attack-surface-with-shodan-and-n8n/https://karl.fail/blog/monitoring-your-personal-attack-surface-with-shodan-and-n8n/Thu, 12 Feb 2026 14:02:18 GMTAutomate your home network security with n8n and Shodan. Monitor your personal attack surface, scan your DynDNS, and get instant Discord alerts for open ports.https://karl.fail/blog/windows-11-vm-performance-hardening-debloating-and-setup-guide/https://karl.fail/blog/windows-11-vm-performance-hardening-debloating-and-setup-guide/Wed, 11 Feb 2026 21:51:45 GMTI am currently testing a Windows 11 VM for gaming with GPU passthrough, instead of CachyOS, which I talked about in my previous post. While Linux has madehttps://karl.fail/blog/how-i-automated-my-wow-nerd-obsession-with-n8n-browserless-python-a-self-hosting-guide/https://karl.fail/blog/how-i-automated-my-wow-nerd-obsession-with-n8n-browserless-python-a-self-hosting-guide/Sat, 07 Feb 2026 19:13:08 GMTIn which a grown adult builds an entire self-hosted automation flow just to find out which World of Warcraft specs are popular this week. Priorities?…https://karl.fail/blog/unlocking-full-ps5-dualsense-features-in-moonlight-sunshine/https://karl.fail/blog/unlocking-full-ps5-dualsense-features-in-moonlight-sunshine/Fri, 06 Feb 2026 01:19:22 GMTThere is nothing worse than buying premium hardware and having your software treat it like a generic accessory. I recently picked up a PS5 DualSense…https://karl.fail/blog/the-2026-guide-to-linux-cloud-gaming-proxmox-passthrough-with-cachyos-sunshine/https://karl.fail/blog/the-2026-guide-to-linux-cloud-gaming-proxmox-passthrough-with-cachyos-sunshine/Mon, 02 Feb 2026 12:58:43 GMTBuild the Ultimate Linux Cloud Gaming Server: A step-by-step guide to Proxmox, CachyOS, and AMD RX 7900 XTX passthrough. Fixes for Vulkan, Sunshine, and…https://karl.fail/blog/why-i-cancelled-chatgpt-plus-saving-e15-month-with-gemini-advanced/https://karl.fail/blog/why-i-cancelled-chatgpt-plus-saving-e15-month-with-gemini-advanced/Sat, 31 Jan 2026 09:59:24 GMTThe Switch: Why I Dumped ChatGPT Plus for Gemini For a long time, I was a loyal subscriber to ChatGPT Plus. I happily paid the €23.99/month to…https://karl.fail/blog/forget-google-build-your-own-search-api-with-searxng/https://karl.fail/blog/forget-google-build-your-own-search-api-with-searxng/Tue, 21 Oct 2025 20:30:53 GMTLearn how to self-host SearXNG on Proxmox or Docker, use its free search API, and integrate it with Node-RED for OSINT, automation, and…https://karl.fail/blog/hetzner-cloud-api-with-node-red/https://karl.fail/blog/hetzner-cloud-api-with-node-red/Tue, 21 Oct 2025 19:29:32 GMTLearn how to automate Hetzner Cloud with Node-RED. This guide shows step-by-step flows for creating, managing, and destroying cloud workers on demand.…https://karl.fail/blog/clamav-on-steroids-35000-yara-rules-and-a-lot-of-attitude/https://karl.fail/blog/clamav-on-steroids-35000-yara-rules-and-a-lot-of-attitude/Mon, 11 Aug 2025 12:12:09 GMTBuilt a scalable ClamAV + 35K YARA rule cluster with FastAPI, HAProxy, and DB storage for fast, insightful malware analysis – born out of…https://karl.fail/tools/tools-bbot/https://karl.fail/tools/tools-bbot/Mon, 02 Jun 2025 16:45:01 GMTBBOT is a powerful recon automation tool built in Python, designed for bug bounty hunters and security professionals. From subdomain discovery to full webhttps://karl.fail/tools/tools-urh/https://karl.fail/tools/tools-urh/Mon, 02 Jun 2025 04:45:07 GMTUniversal Radio Hacker (URH) is a powerful tool for analyzing and attacking wireless protocols using SDRs. Perfect for pentesters and enthusiasts…https://karl.fail/tools/tools-bettercap/https://karl.fail/tools/tools-bettercap/Sun, 01 Jun 2025 16:45:01 GMTBettercap is a powerful, extensible network attack and recon framework supporting WiFi, BLE, CAN-bus, and more. Ideal for red teamers and network…https://karl.fail/tools/tools-hackingtool/https://karl.fail/tools/tools-hackingtool/Sun, 01 Jun 2025 04:45:01 GMTHackingtool by Z4nzu is an all-in-one ethical hacking framework combining information gathering, exploitation, forensics, and more into a single…https://karl.fail/tools/tools-hacker101/https://karl.fail/tools/tools-hacker101/Sat, 31 May 2025 16:45:02 GMTHacker101 is a free and open-source web security training platform by HackerOne, offering lessons, labs, and CTFs for ethical hackers and…https://karl.fail/tools/tools-reverse-engineering/https://karl.fail/tools/tools-reverse-engineering/Sat, 31 May 2025 04:45:02 GMTDive into the free, all-in-one reverse engineering tutorial by mytechnotalent. Learn x86, ARM, RISC-V, and more with hands-on lessons, projects, and…https://karl.fail/tools/tools-juice-shop/https://karl.fail/tools/tools-juice-shop/Fri, 30 May 2025 06:45:02 GMTOWASP Juice Shop is the ultimate playground for web security enthusiasts. Learn, hack, and train with the most vulnerable secure app ever…https://karl.fail/tools/tools-dirsearch/https://karl.fail/tools/tools-dirsearch/Thu, 29 May 2025 18:45:00 GMTdirsearch is a powerful Python-based web path brute-forcing tool that helps security researchers uncover hidden directories and files. Packed with…https://karl.fail/tools/tools-wstg/https://karl.fail/tools/tools-wstg/Thu, 29 May 2025 06:45:01 GMTThe OWASP Web Security Testing Guide is a comprehensive manual for assessing web application security. It offers structured methodologies, real-world…https://karl.fail/tools/tools-awesome-hacking/https://karl.fail/tools/tools-awesome-hacking/Wed, 28 May 2025 18:45:01 GMTExplore Awesome Hacking – the ultimate curated list of cybersecurity tools, tutorials, and learning platforms for hackers, pentesters, and…https://karl.fail/tools/tools-h4cker/https://karl.fail/tools/tools-h4cker/Wed, 28 May 2025 06:45:01 GMTH4cker is a curated cybersecurity repository featuring 10,000+ resources across ethical hacking, malware analysis, DFIR, AI security, and more-perfect forhttps://karl.fail/tools/tools-x64dbg/https://karl.fail/tools/tools-x64dbg/Tue, 27 May 2025 18:45:01 GMTx64dbg is a powerful open-source debugger for Windows with features like disassembly, patching, scripting, and plugin support. Ideal for reverse engineershttps://karl.fail/tools/tools-dvwa/https://karl.fail/tools/tools-dvwa/Mon, 26 May 2025 06:45:01 GMTDVWA is an intentionally vulnerable PHP web app designed for learning and practicing web security in a safe environment. Perfect for students, pentesters,https://karl.fail/tools/tools-hackbrowserdata/https://karl.fail/tools/tools-hackbrowserdata/Mon, 26 May 2025 00:45:02 GMTHackBrowserData is a powerful command-line tool to decrypt and export browser data like passwords, cookies, and history across Windows, macOS, and Linux.…https://karl.fail/tools/tools-hacktricks/https://karl.fail/tools/tools-hacktricks/Sun, 25 May 2025 18:45:01 GMTHackTricks is a curated offensive security knowledge base used by red teamers, pentesters, and bug bounty hunters. Explore real-world attack techniques,…https://karl.fail/tools/tools-redteam-tools/https://karl.fail/tools/tools-redteam-tools/Sun, 25 May 2025 02:45:01 GMTRedTeam-Tools is a massive open-source repository of 150+ tools curated for offensive security professionals. It covers every stage of red teaming from…https://karl.fail/tools/tools-rustscan/https://karl.fail/tools/tools-rustscan/Sat, 24 May 2025 20:45:02 GMTRustScan is a lightning-fast, adaptive port scanner written in Rust, offering scriptable automation, Nmap integration, and support for IPv6 and…https://karl.fail/tools/tools-cve/https://karl.fail/tools/tools-cve/Sat, 24 May 2025 14:45:01 GMTTrickest CVE is an automated repository of thousands of public exploit PoCs, ideal for pentesters, red teams, and security researchers looking to stay…https://karl.fail/tools/tools-rengine/https://karl.fail/tools/tools-rengine/Sat, 24 May 2025 08:45:02 GMTreNgine is a feature-rich web reconnaissance and vulnerability scanner for bug bounty hunters and security teams. It combines automation, intelligence,…https://karl.fail/tools/tools-owasp-mastg/https://karl.fail/tools/tools-owasp-mastg/Sat, 24 May 2025 02:45:01 GMTThe OWASP MASTG is the definitive guide to mobile app security testing and reverse engineering. Ideal for penetration testers, developers, and auditors,…https://karl.fail/tools/tools-imhex/https://karl.fail/tools/tools-imhex/Fri, 23 May 2025 20:45:01 GMTImHex is a modern, feature-rich hex editor built for reverse engineers and developers. It offers advanced data parsing, disassembly, and visualization…https://karl.fail/tools/tools-red-teaming-toolkit/https://karl.fail/tools/tools-red-teaming-toolkit/Fri, 23 May 2025 14:19:28 GMTThe Red Teaming Toolkit is a curated collection of open-source security tools used for adversary simulation and red teaming. Perfect for ethical hackers…https://karl.fail/tools/vulnerabilities-cve-2025-24118/https://karl.fail/tools/vulnerabilities-cve-2025-24118/Fri, 23 May 2025 11:40:02 GMTCVE-2025-24118 is a critical vulnerability in macOS and iPadOS that allows apps to cause system termination or write kernel memory. Users should update…https://karl.fail/tools/vulnerabilities-cve-2025-27891/https://karl.fail/tools/vulnerabilities-cve-2025-27891/Fri, 23 May 2025 10:40:05 GMTCVE-2025-27891 exposes Samsung processors and modems to critical risks due to insufficient length checks on incoming NAS packets. Update your devices to…https://karl.fail/tools/vulnerabilities-cve-2025-24241/https://karl.fail/tools/vulnerabilities-cve-2025-24241/Fri, 23 May 2025 09:39:59 GMTCVE-2025-24241 is a critical vulnerability in Apple’s macOS products that allows malicious apps to copy sensitive data to the pasteboard. Apple has…https://karl.fail/blog/i-tested-a-viral-anti-spam-prompt-it-failed-spectacularly/https://karl.fail/blog/i-tested-a-viral-anti-spam-prompt-it-failed-spectacularly/Fri, 23 May 2025 09:30:02 GMTOkay, I’ll admit it, I was rage-baited into writing this article. Lately, I’ve been spending some time automating all of my LinkedIn tasks. I don’t…https://karl.fail/tools/vulnerabilities-cve-2025-4052/https://karl.fail/tools/vulnerabilities-cve-2025-4052/Fri, 23 May 2025 08:40:00 GMTCVE-2025-4052 is a critical vulnerability in Chrome’s DevTools, allowing attackers to bypass access control via a crafted HTML page. Users must…https://karl.fail/tools/vulnerabilities-cve-2025-30465/https://karl.fail/tools/vulnerabilities-cve-2025-30465/Fri, 23 May 2025 07:40:06 GMTA critical vulnerability in Apple’s macOS and iPadOS allows apps to access files outside of the Shortcuts app, posing a risk to sensitive user data.https://karl.fail/tools/tools-ciphey/https://karl.fail/tools/tools-ciphey/Fri, 23 May 2025 01:45:06 GMTCiphey is a blazing-fast, AI-powered decryption tool that detects and decodes unknown encrypted text automatically. Perfect for CTFs, analysts, and cyber…https://karl.fail/tools/vulnerabilities-cve-2025-30452/https://karl.fail/tools/vulnerabilities-cve-2025-30452/Fri, 23 May 2025 00:40:01 GMTA critical vulnerability in macOS, CVE-2025-30452, has been addressed in recent updates. It stems from improper input validation and could lead to serioushttps://karl.fail/tools/vulnerabilities-cve-2025-24196/https://karl.fail/tools/vulnerabilities-cve-2025-24196/Thu, 22 May 2025 23:40:01 GMTA critical vulnerability in macOS allows an attacker with user privileges to read kernel memory, posing a serious security risk. Users are urged to updatehttps://karl.fail/tools/vulnerabilities-cve-2025-24109/https://karl.fail/tools/vulnerabilities-cve-2025-24109/Thu, 22 May 2025 22:40:01 GMTCVE-2025-24109 is a critical vulnerability in macOS, allowing unauthorized apps to access sensitive user data. Users must update to the latest version…https://karl.fail/tools/vulnerabilities-cve-2025-27650/https://karl.fail/tools/vulnerabilities-cve-2025-27650/Thu, 22 May 2025 21:40:01 GMTCVE-2025-27650 exposes Vasion Print users to critical risks due to insufficiently protected private keys. Update to the latest version to mitigate…https://karl.fail/tools/vulnerabilities-cve-2025-30113/https://karl.fail/tools/vulnerabilities-cve-2025-30113/Thu, 22 May 2025 20:40:01 GMTCVE-2025-30113 exposes Forvia Hella HELLA Driving Recorder DR 820 to critical security risks due to hardcoded credentials in the APK. Immediate action is…https://karl.fail/tools/vulnerabilities-cve-2025-24266/https://karl.fail/tools/vulnerabilities-cve-2025-24266/Thu, 22 May 2025 19:40:01 GMTCVE-2025-24266 is a critical vulnerability in macOS that could cause unexpected system termination due to a buffer overflow. Affected users should update…https://karl.fail/tools/vulnerabilities-cve-2025-24233/https://karl.fail/tools/vulnerabilities-cve-2025-24233/Thu, 22 May 2025 18:40:01 GMTCVE-2025-24233 in macOS allows malicious apps to read or write to protected files. Apple has released fixes, and it is crucial to update…