They have only authorized the bastion-security-group with Microsoft Remote Desktop Protocol (RDP) access to the application instance security groups, but the company wants to further limit administrative access to all of the instances in the VPC. They are connecting to the VPC over the Internet to manage all of their Amazon EC2 instances running in both the public and private subnets. A customer is running a multi-tier web application farm in a virtual private cloud (VPC) that is not connected to their corporate network.Open to further feedback, discussion and correction.AWS exam questions are not updated to keep up the pace with AWS updates, so even if the underlying feature has changed the question might not be updated.AWS services are updated everyday and both the answers and questions might be outdated soon, so research accordingly.Questions are collected from Internet and the answers are marked as per my knowledge and understanding (which might differ with yours).Deploy a Bastion host within each Availability Zone for HA, cause if the Bastion instance or the AZ hosting the Bastion server goes down the ability to connect to your private instances is lost completelyĪWS Certification Exam Practice Questions.Security for all the Instances in the private subnet should be hardened to accept SSH/RDP connections only from the Bastion host.

Bastion host for your AWS infrastructure shouldn’t be used for any other purpose, as that could open unnecessary security holes.Bastion host security can be further tightened to allow SSH/RDP access from specific trusted IPs or corporate IP ranges.Bastion host allows you to login to instances in the Private subnet securely without having to store the private keys on the Bastion host (using ssh-agent forwarding or RDP gateways).Bastion host is a security measure that helps to reduce attack on your infrastructure and you have to concentrate to hardening a single layer.Bastion host is deployed in the Public subnet and acts as a proxy or a gateway between you and your instances.Bastion host launched in the Public subnets would act as a primary access point from the Internet and acts as a proxy to other instances.In AWS, a Bastion host (also referred to as a Jump server) can be used to securely access instances in the private subnets.Bastion means a structure for Fortification to protect things behind it.

Aws ssh bastion agent forwarding