netgems
Alejandro Marin

netgems.

Notes and thoughts about network technologies and solutions.

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Networking
CIS & NIST assessments DORA compliance Cisco IOS-XE Nexus switches Palo Alto Check Point Fortinet Azure Network management Configuration drift CVE reports VPN tunnel migrations
Systems
Windows Server Red Hat Python Bash Git MongoDB
Learning
Terraform Kubernetes Grafana AI

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professional services · 2026
Roadmaps — what are they good for
Why roadmap formats keep changing, what a roadmap actually is underneath the format, and a one-page template that stops you rebuilding the substance every time the framing shifts.
cisco · 2019
SNMPv3 cheat-sheet
A short cheat-sheet on SNMPv3 security: users, auth, and privacy levels worth remembering.
computer networks · 2019
APIs
Quick reference on what REST means in practice — resources, verbs, and the shape of a well-behaved API.
netbrain · 2026
Config Sentinel — unsaved configuration drift detection
A NetBrain Network Intent that flags devices whose running config has drifted from startup — no scripts, no extra tooling, green/red status on the map.

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