NOTES / ENGINEERING LOG

Technical notes and checklists

Troubleshooting notes, command references, checklists and short explanations written for later reuse.

The current entries are templates, not completed technical articles.

Cloud securityTemplate

Azure Network Security Notes

A learning template for controls, identity, logging, open questions and validation.

AzureSecurity

Template — replace with verified notes

Network securityTemplate

NAT Mental Model

A compact placeholder for documenting pre-NAT and post-NAT reasoning without invented commands.

NATFirewall

Template — replace with verified notes

NetworkingTemplate

OSPF Troubleshooting Notes

An editable symptoms-to-checks troubleshooting note template.

OSPFCCNA

Template — replace with verified notes

NetworkingTemplate

Packet Flow Checklist

A short template for checking source, destination, Layer 2, routing, NAT, policy, return path and application behaviour.

TroubleshootingPacket flow

Template — replace with verified notes