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aws-advanced-networking

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Demonstration of VPC Peering and VPN connections in AWS

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# aws-advanced-networking
Demonstration of VPC Peering and site-to-site VPN connections using dynamic routing in AWS.  The architecture below is created by CloudFormation templates.

![Architecture](https://user-images.githubusercontent.com/3911650/29056799-dfe25d04-7bc2-11e7-871a-844e8837adcd.png)

## Features
* Highly available architecture
* VPC peering between web and API tiers
* Site-to-site IPSec VPN tunnels between Corporate (containing the database) and API tier
* VyOS routers for routing corporate network traffic
* Dynamic routing using BGP
* Dual-homed router instances to separate internal (within corporate network) and external (outside corporate network) traffic and their security groups
* Route53 private hosted zone for custom private domains
* VPC flow logs to inspect accepted and rejected network traffic at the network interface level
* 3-tier MEAN stack application spanning 3 VPCs and tolerant of multiple network failures in `src/`

## The Templates
There are three templates in `infrastructure/`:
1. `cloudformation.json`: The full template with all of the resources illustrated (and more). CloudFormation explicitly denies using Elastic IPs for Customer Gateway IP addresses, so this part should be performed manually (or using a [custom resource](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-custom-resources.html))
1. `cloudformation-corporate-side.json`: The corporate network and a single instance to represent both the web and API tiers. This is to focus on VPN connections and dual-homed routers.
1. `cloudformation-cloud-side.json`: The web and API tiers with a single instance to represent the corporate network. This is to focus on VPC Peering, VPC flow logs, and Route53 private hosted zones.

The corporate network is simulated using a VPC and corporate IP addresses are simulated using Elastic IPs.

## Working With the Templates
Each template creates a user named `student` that has the required IAM permissions to work with the created resources.

aws-advanced-networking

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