Kubernetes NetworkPolicy: Open One Path and Prove the Rest Stay Closed
A NetworkPolicy exists in the API, but your connection still succeeds. Or you allow ingress and the connection still fails. Both are …
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Linux/Unix
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Google Sign-In for EspoCRM: Follow the Identity All the Way Back
A successful Google login doesn’t automatically tell EspoCRM which local user to open or which records that user may access. Those are …
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Put Traefik in Front of WordPress, Then Test the Boundary
A reverse proxy gives you a place to apply request policy before traffic reaches WordPress. To use it well, you need to understand which router …
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Build an LXC Lab You Can Explain Layer by Layer
A container lab is easier to debug when you know which layer owns the failure. “The container can’t reach the network” could mean a problem …
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Containers Inside a VM: Which Kernel Are You Actually Running?
You want several disposable Linux environments on one machine. Containers and virtual machines can both get you there, but they do not give you …
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Your Installer Finished. What Happens After Reboot?
An installer can print “done” while leaving the machine one reboot away from failure. The interesting engineering problem is the transition …
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