- Bastion Host :
- A bastion host is a system exposed to the internet and is highly protective against malicious attacks.
- Also known as a Jump Box, it acts as a proxy server, facilitating client machine connections to remote servers.
- It typically resides outside the firewall and filters incoming traffic to prevent unwanted connections, acting as a gateway to maintain security by blocking unnecessary software and daemons.
- High Availability :
- Fault tolerance can be achieved by placing servers across different availability zones.
- If one availability zone fails, the application will still handle traffic from another zone.
- Elastic Load Balancers are crucial for achieving High Availability and fault tolerance.
- Elastic Load Balancer:
- Load Balancer distributes incoming application or network traffic across multiple targets in multiple Availability Zones.
- AWS has three types of load balancers: Application Load Balancer (for HTTP/HTTPS traffic), Network Load Balancer (for TCP/UDP protocols), and Classic Load Balancer (basic load balancing for Amazon EC2 instances).
Hands-on lab
- Go to the AWS Management Console.
- In the Management & Governance section, select CloudFormation.
- Click on the Create Stack button.
- Select the Template tab and upload the CloudFormation template for the VPC.
- In the Parameters section, enter the values for the public and private subnets.
- Click on the Create button.
- The stack will be created and the VPC will be provisioned.
- You can now use the public and private subnets to create resources in the lab.
click on Output tab, you will see
