I triaged this CVE for my own perimeter the moment it hit the KEV catalog. If you’re running F5 BIG-IP with APM, here’s what you need to know and do—fast. CVE-2025-53521 dropped into CISA’s Known Exploited Vulnerabilities catalog on March 27, and the remediation deadline is March 30. If you’re running… Read more →
Security, DevOps & Trading Tech — Practical Guides
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CVE-2026-3055: Citrix NetScaler Token Theft — Patch Now
Last Wednesday I woke 🔧 From my experience: After CitrixBleed, I started running automated config diffs against known-good baselines on a daily cron. It’s a 10-line bash script that’s caught unauthorized changes twice. Don’t wait for the next CVE to build that habit. up to three Slack messages from different clients,… Read more →
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Git Worktrees: The Feature That Killed My Stash Habit
Last Tuesday I was deep in a refactor — 40 files touched, tests half-green — when Slack lit up: “Production’s returning 500s, can you look at main?” My old workflow: git stash, switch branches, forget what I stashed, lose 20 minutes reconstructing state. My current workflow: git worktree add ../hotfix… Read more →
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Mastering Kubernetes Security: Network Policies &
Network policies are the single most impactful security control you can add to a Kubernetes cluster — and most clusters I audit don’t have a single one. After implementing network segmentation across enterprise clusters with hundreds of namespaces, I’ve developed a repeatable approach that works. Here’s the playbook I use. Introduction… Read more →
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Zero Trust for Developers: Simplifying Security
Most Zero Trust guides are theoretical whitepapers that never touch a real network. I’ve actually implemented Zero Trust on my home network — OPNsense firewall with micro-segmented VLANs, mTLS between services, and identity-based access for every endpoint. Here’s how I translate those same principles into developer-friendly patterns that work in… Read more →
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UPS Battery Backup: Sizing, Setup & NUT on TrueNAS
Last month my TrueNAS server rebooted mid-scrub during a power flicker that lasted maybe half a second. Nothing dramatic — the lights barely dimmed — but the ZFS pool came back with a degraded vdev and I spent two hours rebuilding. That’s when I finally stopped procrastinating and bought a… Read more →
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Insider Trading Detector with Python & Free SEC Data
Last month I noticed something odd. Three directors at a mid-cap biotech quietly bought shares within a five-day window — all open-market purchases, no option exercises. The stock was down 30% from its high. Two weeks later, they announced a partnership with Pfizer and the stock popped 40%. I didn’t catch… Read more →
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Track Pre-IPO Valuations: SpaceX, OpenAI & More
SpaceX is being valued at $2 trillion by the market. OpenAI at $1.3 trillion. Anthropic at over $500 billion. But none of these companies are publicly traded. There’s no ticker symbol, no earnings call, no 10-K filing. So how do we know what the market thinks they’re worth? The answer lies… Read more →
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RegexLab: Free Offline Regex Tester With 5 Modes Regex101 Doesn’t Have
Last week I was debugging a CloudFront log parser and pasted a chunk of raw access logs into Regex101. Mid-keystroke, I realized those logs contained client IPs, user agents, and request paths from production. All of it, shipped off to someone else’s server for “processing.” That’s the moment I decided to… Read more →
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Docker Compose vs Kubernetes: Secure Homelab Choices
Last year I moved my homelab from a single Docker Compose stack to a K3s cluster. It took a weekend, broke half my services, and taught me more about container security than any course I’ve taken. Here’s what I learned about when each tool actually makes sense—and the security traps… Read more →