Code from github to self hosted with git tea in AWS

2026-03-20 12:01:02 +05:30
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+# AWS VPC From Scratch
+
+A production-style AWS Virtual Private Cloud (VPC) built
+from scratch with public/private subnet isolation,
+Bastion Host access pattern, NAT Gateway,
+and multi-layer network security.
+
+---
+## 📸 Screenshots
+
+> All build screenshots are available in the [`/images`](./images) folder, numbered `1` through `36` in chronological build order.
+---
+
+### VPC Dashboard
+![VPC](./images/aws-vpc-from-scratch-02.png)
+
+### SSH into Bastion
+![Bastion SSH](./images/aws-vpc-from-scratch-23.png)
+
+### SSH Jump to Private EC2
+![Private EC2 SSH](./images/aws-vpc-from-scratch-24.png)
+
+### Internet Test
+![Ping](./images/aws-vpc-from-scratch-25.png)
+---
+## Architecture
+```
+┌─────────────────────────────────────────────────┐
+│                VPC (10.0.0.0/16)                │
+│                                                 │
+│  ┌───────────────────────┐                      │
+│  │   Public Subnet       │                      │
+│  │   10.0.1.0/24         │                      │
+│  │                       │                      │
+│  │  [Bastion Host EC2]   │                      │
+│  │  [NAT Gateway]        │                      │
+│  └──────────┬────────────┘                      │
+│             │ SSH Jump                          │
+│  ┌──────────▼────────────┐                      │
+│  │   Private Subnet      │                      │
+│  │   10.0.2.0/24         │                      │
+│  │                       │                      │
+│  │  [Private EC2]        │                      │
+│  │  (No Public IP)       │                      │
+│  └───────────────────────┘                      │
+│                                                 │
+│  public-rt  → IGW   (internet in + out)         │
+│  private-rt → NAT   (outbound only)             │
+└─────────────────────┬───────────────────────────┘
+                      │
+              [Internet Gateway]
+                      │
+                  Internet
+```
+
+---
+
+## AWS Services Used
+
+- VPC + Subnets (Public & Private)
+- Internet Gateway
+- NAT Gateway
+- Route Tables
+- Security Groups
+- Network ACLs (NACLs)
+- EC2 (Bastion Host + Private Instance)
+
+---
+
+## Network Design
+
+| Component | Value |
+|---|---|
+| VPC CIDR | 10.0.0.0/16 |
+| Public Subnet | 10.0.1.0/24 |
+| Private Subnet | 10.0.2.0/24 |
+| Bastion Host | Public Subnet — t2.micro |
+| Private EC2 | Private Subnet — t2.micro (no public IP) |
+
+---
+
+## Security Design
+
+### Security Groups (Instance Level)
+| SG | Inbound Rule |
+|---|---|
+| bastion-sg | SSH port 22 from my IP only (/32) |
+| private-ec2-sg | SSH port 22 from bastion-sg only |
+
+### NACLs (Subnet Level)
+| NACL | Inbound Rules |
+|---|---|
+| public-nacl | Allow SSH (22) + Ephemeral ports (1024-65535) |
+| private-nacl | Allow SSH from 10.0.1.0/24 + Ephemeral ports |
+
+---
+
+## Key Concepts Demonstrated
+
+- Public vs Private subnet isolation
+- Internet Gateway vs NAT Gateway
+- Bastion Host / Jump Server pattern
+- Stateful (SG) vs Stateless (NACL) firewalls
+- Defense-in-depth network security
+- CIDR block planning
+
+---
+
+## Test Results
+
+| Test | Result |
+|---|---|
+| SSH into Bastion Host | ✅ |
+| SSH jump to Private EC2 via Bastion | ✅ |
+| ping google.com from Private EC2 | ✅ |
+| Private EC2 unreachable from internet directly | ✅ |
+| NACL IP block test | ✅ |
+
+---
+## 👨‍💻 Author
+
+**Aditya Nair**
+- GitHub: [@ADITYANAIR01](https://github.com/ADITYANAIR01)
+- LinkedIn: [linkedin.com/in/adityanair001](https://www.linkedin.com/in/adityanair001)
+
+---