Internet Gateway - Access Public Network from Public Subnet

Rajeev Reddy Nareddula 1/21/2024

REQMAT BLOGSPOT - Nareddula Rajeev Reddy NRR

Steps:

Login to the aws console, https://aws.amazon.com by using credentials.
While logged on to the AWS portal, please go to Networking & Content Delivery
Then select “VPC”
Click “Create VPC”
While creating VPC, in Name Tag “Siva_VPC”and IPV4 CIDR block “10.0.0.0/16”. Then click “Yes
create” button.
Now you can able to view the Siva VPC in VPC option.
Then we need to create subnet for VPC, i.e. Public Subnet and Private Subnet.
In Under VPC dashboard, “Subnets” option is there
Select “Create Subnet”
In Name Tag “Siva_Public_Network” , VPC Select “Siva_VPC”, Availablility Zone select “1B” and IPV4 CIDR BLOCK 10.0.2.0/24.
Then click “Yes, Create”.
In Name Tag “Siva_Private_Network” , VPC Select “Siva_VPC”, Availablility Zone select “1A” and IPV4 CIDR BLOCK 10.0.1.0/24.
Then click “Yes, Create”.
Now we need to create an instance, on public network. Click Launch Instance
Select “AMI”
Select “General Purpose – t2 micro” then click “Next”
In Network, select “Siva_VPC”, in subnet select “Siva_Public_network” and in Auto assign Public IP “Enable”.
Then click “Next”
Leave the setting by default.
Then Click “Next”.
In Key “name” and in value “Public Instance”.
Then click “Next”.
In Assign a Security group click “Create a new security Group”
Security Group name: Siva_Public_Sec_Group
Description: Siva_Public_Sec_Group
Click Review and Launch.
Leave the settings default.
Click Launch.
While click launch, need to select the Choose an existing key pair and select the key pair as “siva_vpc” and Select the option I acknowledge.
Then click launch instance.
Now, public instance is ready and have got public IP also.
Now can try to RDP for 13.127.108.90 IP.

Internet Gateway

Go to VPC Dashboard, we can able to see an Internet Gateways option.
Click the Internet Gateways in VPC Dashboard,
Click “create Internet Gateway”.
In Name Tag, Type “Siva IGW”.
Then click “Yes, Create”.
We can able to see “Siva IGW” option. But it is detached mode.
We need to attach VPC into that i.e. Siva_VPC.
In Attach to VPC, Siva_VPC is selected,
Click Yes, Attach button.
We need to create route table for Public subnet. In Name tag “Siva_Public_route_table”. Then select
VPC as “Siva VPC”.
Click “yes, create”.
By default, 10.0.0.0/16 subnet route only available.
Click Edit option in route table.
Then click “add another route”.
In Public route table, add default route 0.0.0.0/0 with next hop address as igw (internet gateway).
Then Click “Save”.
In Subnet associations, click edit option.
In Edit option, select “Siva_Public_network”.
Then click save.
Now you Can try to connect internet.

Note: Make sure to have details like names, tags, description, permissions, ports, CIDR etc. as per your needs and requirements. Private IPs depends on CIDR taken.