Lab Information
The Nautilus DevOps Team has received a request from the Networking Team to set up a new public VPC to support a set of public-facing services. This VPC will host various resources that need to be accessible over the internet. As part of this setup, you need to ensure the VPC has public subnets with automatic IP assignment for resources. Additionally, a new EC2 instance will be launched within this VPC to host public applications that require SSH access. This setup will enable the Networking Team to deploy and manage public-facing applications.
Create a public VPC named xfusion-pub-vpc, and a subnet named xfusion-pub-subnet under the same, make sure public IP is being auto assigned to resources under this subnet. Further, create an EC2 instance named xfusion-pub-ec2 under this VPC with instance type t2.micro. Make sure SSH port 22 is open for this instance and accessible over the internet.
Lab Solutions
🔹 STEP 1: Create the Public VPC
Go to AWS Console → VPC
Click Create VPC
Select VPC only
Configure:
Name: xfusion-pub-vpc
IPv4 CIDR block: 10.0.0.0/16
Tenancy: Default
Click Create VPC
🔹 STEP 2: Create the Public Subnet
In VPC → Subnets
Click Create subnet
Configure:
VPC: xfusion-pub-vpc
Subnet name: xfusion-pub-subnet
Availability Zone: any (e.g., us-east-1a)
IPv4 CIDR: 10.0.1.0/24
Click Create subnet
🔹 STEP 3: Enable Auto-Assign Public IP on Subnet (VERY IMPORTANT)
Select xfusion-pub-subnet
Click Actions → Edit subnet settings
Enable:
✅ Auto-assign public IPv4 address
Click Save
This ensures all EC2 instances launched in this subnet get a public IP automatically.
🔹 STEP 4: Create & Attach Internet Gateway
4.1 Create Internet Gateway
VPC → Internet Gateways
Click Create internet gateway
Name: xfusion-pub-igw
Click Create
4.2 Attach Internet Gateway to VPC
Select xfusion-pub-igw
Click Actions → Attach to VPC
Select xfusion-pub-vpc
Click Attach
🔹 STEP 5: Configure Route Table for Internet Access
Go to VPC → Route Tables
Select the route table associated with xfusion-pub-vpc
Click Edit routes
Add route:
Destination: 0.0.0.0/0
Target: Internet Gateway (xfusion-pub-igw)
Save changes
Associate Route Table with Subnet
Go to Subnet associations
Click Edit subnet associations
Select xfusion-pub-subnet
Save
🔹 STEP 6: Launch EC2 Instance in Public VPC
Go to EC2 → Launch instance
Configure:
Instance details
Name: xfusion-pub-ec2
AMI: Amazon Linux or Ubuntu
Instance type: t2.micro
Network settings
VPC: xfusion-pub-vpc
Subnet: xfusion-pub-subnet
Auto-assign public IP: Enabled
Security Group (IMPORTANT)
Create a new security group:
Name: xfusion-pub-sg
Inbound rules:
Type Port Source
SSH 22 0.0.0.0/0
Outbound: Allow all
Launch the instance
🔹 STEP 7: Verify Internet & SSH Access
Wait for:
Instance state: Running
Status checks: 2/2 passed
Select xfusion-pub-ec2
Confirm:
Public IPv4 address exists
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