Archive

2026 ⁵

January ⁵

AWS DynamoDB Basics

January 2, 2026 · 8 min · Ren Nishino

TLS and mTLS Basics

January 2, 2026 · 8 min · Ren Nishino

AWS IAM Identity Providers - OIDC, SAML, and Federation APIs

January 2, 2026 · 5 min · Ren Nishino

Cognito OIDC Authorization Code Flow with External IdP

January 2, 2026 · 4 min · Ren Nishino

AWS Systems Manager (SSM) Basics

January 2, 2026 · 7 min · Ren Nishino

2025 ¹⁹

December ¹²

AWS CodeDeploy Basics

December 31, 2025 · 13 min · Ren Nishino

AWS Control Tower Basics

December 31, 2025 · 11 min · Ren Nishino

EKS & Kubernetes Basics - Difference from ECS

December 29, 2025 · 23 min · Ren Nishino

AWS RDS, Aurora, and EBS Storage Basics

December 27, 2025 · 7 min · Ren Nishino

EC2 CloudWatch Metrics - Why Some Require Agent

December 26, 2025 · 3 min · Ren Nishino

DOP-C02 notes

December 26, 2025 · 33 min · Ren Nishino

OSI Model and Network Basics: How Data Travels Across the Internet

December 16, 2025 · 8 min · Ren Nishino

Bandit Wargame Walkthrough

December 3, 2025 · 8 min · Ren Nishino

AWS CodePipeline Basics

December 4, 2025 · 5 min · Ren Nishino

Linux Shell Basics: Login Shells and Shell Access

December 2, 2025 · 8 min · Ren Nishino

AWS CDK, CloudFormation, and StackSets Explained

December 2, 2025 · 8 min · Ren Nishino

Network Firewall vs Proxy Server vs Secure Web Gateway (SWG)

December 2, 2025 · 9 min · Ren Nishino

November ⁷

AWS Management Console - How Browser Makes API Calls

November 28, 2025 · 6 min · Ren Nishino

CORS (Cross-Origin Resource Sharing) Explained

November 28, 2025 · 7 min · Ren Nishino

curl and openssl Flow Through Corporate Proxy with SSL Inspection

November 28, 2025 · 5 min · Ren Nishino

HAR File Format - Understanding Browser Network Logs

November 28, 2025 · 11 min · Ren Nishino

Jonny (Self-Learning AI Assistant) - Amazon Q CLI