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  • How to Launch an EC2 Instance on AWS Step by Step - AMI, Instance Type, Key Pair, Security Group, Connect with SSH or EC2 Instance Connect, Stop vs Terminate (AWS Part-4)

    calendar Oct 10, 2026 · 16 min read  ·
    Last Modified : Oct 10, 2026
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    How to Launch an EC2 Instance on AWS Step by Step - AMI, Instance Type, Key Pair, Security Group, Connect with SSH or EC2 Instance Connect, Stop vs Terminate (AWS Part-4)

    Identities are sorted - an IAM user (Part-1), accounts (Part-2) and roles (Part-3). Time to run something. Amazon EC2 (Elastic Compute Cloud) is the virtual server service, and in this Part-4 we launch one from the console, connect to it, and understand every choice on the launch page so that nothing on the bill …


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  • What is an AWS VPC and a Subnet? Virtual Private Cloud Explained in Five Minutes (Region, Availability Zones, Public vs Private Subnets, Gateways, Route Tables)

    calendar Oct 10, 2026 · 9 min read  ·
    Last Modified : Oct 10, 2026
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    What is an AWS VPC and a Subnet? Virtual Private Cloud Explained in Five Minutes (Region, Availability Zones, Public vs Private Subnets, Gateways, Route Tables)

    Before the full VPC build in Part-5 of the AWS series - which takes an hour and creates fifteen resources - here is the five-minute version that the short video above gives you in 27 seconds: what a VPC is, what a subnet is, and the handful of words around them. If you can explain this page to a colleague, the rest of …


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  • What is AWS CloudFormation? Templates, Stacks and Change Sets Explained, Template Anatomy Section by Section, Create Your First Stack Step by Step, Update With a Change Set, Drift Detection, Nested Stacks and StackSets, Quotas, Pricing, CLI, and CloudFormation vs Terraform

    calendar Oct 10, 2026 · 23 min read  ·
    Last Modified : Oct 10, 2026
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    What is AWS CloudFormation? Templates, Stacks and Change Sets Explained, Template Anatomy Section by Section, Create Your First Stack Step by Step, Update With a Change Set, Drift Detection, Nested Stacks and StackSets, Quotas, Pricing, CLI, and CloudFormation vs Terraform

    Most of this blog uses Terraform to build AWS infrastructure, so people ask me regularly - do I still need to know CloudFormation? The answer is yes, for three reasons - it is the native infrastructure-as-code service of AWS and shows up everywhere (Control Tower, Service Catalog, SAM, CDK, the "Launch …


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  • What is CIDR (Classless Inter-Domain Routing)? How to Calculate IP Ranges for VPCs and Subnets, with Examples (/8, /16, /24, /28, /32)

    calendar Oct 10, 2026 · 18 min read  ·
    Last Modified : Oct 21, 2026
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    What is CIDR (Classless Inter-Domain Routing)? How to Calculate IP Ranges for VPCs and Subnets, with Examples (/8, /16, /24, /28, /32)

    Every network tutorial on this blog - the AWS VPC, VPC peering, Transit Gateway, Cloud WAN, the GCP VPC posts, even the Kubernetes setup - starts with something like 10.0.0.0/16. If that slash-sixteen has always been a thing you copy rather than a thing you understand, this post fixes it in ten minutes. CIDR - …


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  • What is NAT (Network Address Translation)? How It Works, Static NAT vs Dynamic NAT vs PAT, the Translation Table, and Where NAT Shows Up in AWS

    calendar Oct 10, 2026 · 14 min read  ·
    Last Modified : Oct 10, 2026
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    What is NAT (Network Address Translation)? How It Works, Static NAT vs Dynamic NAT vs PAT, the Translation Table, and Where NAT Shows Up in AWS

    Your laptop has the address 192.168.1.10. So does your neighbour's. So do roughly a hundred million other laptops in the world right now - and yet every one of them can open this page. The trick that makes that possible is NAT, network address translation, and it is also the trick behind the AWS NAT Gateway that lets …


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  • AWS API Gateway Tutorial - REST API with Lambda Proxy and Non-Proxy Integration, Request Validation, HTTP API vs REST API, Resource Policies, Lambda Authorizers and Terraform

    calendar Aug 1, 2025 · 18 min read  ·
    Last Modified : Oct 10, 2026
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    AWS API Gateway Tutorial - REST API with Lambda Proxy and Non-Proxy Integration, Request Validation, HTTP API vs REST API, Resource Policies, Lambda Authorizers and Terraform

    If you prefer to watch, the whole guide is also a video - In this article we are going to look at Amazon API Gateway - the AWS service that acts as the "front door" for your backend, whether that backend is a Lambda function, a container on ECS/Fargate, an EC2 instance or another AWS service. If you have …


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  • Learn AWS S3 - The Complete Course (Buckets, Objects, Storage Classes, Lifecycle, Versioning, Security Defaults, Bucket Policies, Static Hosting, CLI and Terraform)

    calendar Sep 9, 2024 · 23 min read  ·
    Last Modified : Oct 10, 2026
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    Learn AWS S3 - The Complete Course (Buckets, Objects, Storage Classes, Lifecycle, Versioning, Security Defaults, Bucket Policies, Static Hosting, CLI and Terraform)

    Amazon S3 (Simple Storage Service) was the second AWS service ever launched, back in 2006, and it is still the one you will touch in almost every AWS project - for backups, logs, build artifacts, static websites, data lakes, Terraform state files and the images on this very blog. It is object storage - you put files …


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  • Boost Your AWS Security with Terraform : A Step-by-Step Guide

    calendar Jun 30, 2023 · 28 min read  ·
    Last Modified : Jun 30, 2023
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    Boost Your AWS Security with Terraform : A Step-by-Step Guide

    1. Introduction Security in the cloud is not just an option; it's an imperative. Much like a well-guarded fortress, your cloud infrastructure needs robust, scalable defenses. AWS provides us with a wealth of tools and best practices for this task, but managing them manually can feel like trying to organize an unruly …


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  • How to fix private-dns-enabled cannot be set because there is already a conflicting DNS domain?

    calendar Jun 17, 2023 · 3 min read  ·
    Last Modified : Jun 17, 2023
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    How to fix private-dns-enabled cannot be set because there is already a conflicting DNS domain?

    Navigating the intricacies of Amazon Web Services (AWS) can be a complex task. Even seasoned developers working with Infrastructure as Code (IaC) tools like Terraform and CloudFormation may occasionally face frustrating obstacles. A common stumbling block arises from conflicts in Virtual Private Cloud (VPC) settings, …


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  • Terraform AWS IAM - How to Create IAM Users, Roles and Policies (with aws_iam_policy_document examples)

    calendar May 9, 2023 · 18 min read  ·
    Last Modified : Oct 9, 2026
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    Terraform AWS IAM - How to Create IAM Users, Roles and Policies (with aws_iam_policy_document examples)

    This blog post is going to be a comprehensive guide on managing AWS IAM Users, IAM Roles and IAM Policies using Terraform. Managing IAM Users, Roles and Policies is always crucial from a security perspective. Proper management of the IAM User, IAM Roles and IAM Policies can really reduce the operational burden as well …


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Recent Posts

  • Ansible on AWS: Zero-Downtime Deploys Behind an ALB, RDS, and an AI Postmortem (Project 2)
  • Kubernetes IP Address Planning: 22 Problems the Free IP Calculator Solves on EKS, GKE, AKS and On-Premises (kubeadm, Mirantis MKE, RKE2, OpenShift, Tanzu, Talos), with the Numbers and a Screenshot for Each
  • git rebase --exec Explained - Run Your Tests on Every Commit Before You Push, with Real Output, the Failure Path, and the Three Things That Bit Me
  • helm template Explained - Render a Helm Chart Locally Without a Cluster (Helm 4): Values Files, --set, --show-only, --output-dir, and the Traps That Bite
  • Should You Do a Cloud Certification? The Four Reasons I Tell People Not to Collect Them, What the Exams Cost in 2026, and the One Case Where a Certificate Is Worth the Money
  • Three AWS Solutions Architect Associate Questions From My Shorts, Answered Properly - Migrating Web, Batch and Legacy Apps; Cutting EC2 Cost for a 2-Week Shutdown Without Losing Memory; Internet for Private Subnets (with the Prerequisites the 30-Second Answers Skip)
  • What to Learn Before (and Alongside) Cloud - the Six Non-Cloud Skills Every DevOps, SRE and Cloud Engineer Uses Daily: Code and Git, Scripting, CI/CD, Automation, Infrastructure as Code, Networking and Security
  • Google Cloud External HTTP Load Balancer Step by Step - Forwarding Rule, Proxy, URL Map, Backend Service, Health Check and Instance Group in the Console and in Terraform, and Why the First curl Returned 502 (GCP Part 9)

Rahul Wagh

Jhooq
Its all about Open Source and DevOps, here I talk about Kubernetes, Docker, Java, Spring boot and practices.
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