Debian/Ubuntu βWorks on LAN, fails on WANβ: Routing and NAT checks that reveal the cause (case #25)
A hands-on Debian/Ubuntu guide to debug βworks on LAN, fails on WANβ using routing, NAT, rp_filter, MTU, conntrack, and capture-driven proof.
Excel Runs the World: Terrifying Stories That Keep Happening
Excel still powers payroll, pricing, and production ops. Learn why it fails, how incidents happen, and practical SRE checks to contain spreadsheet risk.
Ceph on Proxmox: when itβs worth it, when itβs a trap, and how to size it correctly
A practical, opinionated guide to running Ceph on Proxmox: when it pays off, when it burns you, and how to size CPU, RAM, SSDs, and networking.
LGA vs PGA: Why the Pins Moved to the Motherboard
A practical, ops-minded guide to LGA vs PGA: signal integrity, pin density, failure modes, and field diagnostics when a socket goes sideways.
Ubuntu 24.04: iperf shows speed but app is slow β the hidden bottlenecks to check (case #24)
iperf says the network is fast, yet your app crawls on Ubuntu 24.04. Find the real bottleneck: CPU, IRQs, TCP, storage, DNS, and TLS.