Welcome to Happa, Anonymous Saturday, May 10 2025

Happa makes all financial engineering functions simpler and faster.

We are an independent software vendor specializing in cloud-based solutions with a focus on financial engineering. We provide reliable and cost-effective public cloud solutions to thousands of customers around the world every day.


Products and Services available on AWS.

Sync on-premise MySQL to private RDS using DMS

Synchronize data from an on-premise MySQL server to a privately-run RDS on AWS via a Site-To-Site VPN.

A simple configuration diagram is shown below.

It is assumed that the Site-To-Site VPN connection and Transit Gateway have already been created.

References : How to connect to AWS via Site-to-Site VPN using Juniper SRX300

The tasks to be performed are as follows:

We assume that you are already hosting MySQL on RDS.

Create the following definition in DMS:

  1. Creating a Replication Instance
  2. Create a Source Endpoint
  3. Create a Target Endpoint
  4. Creating a Database migration tasks

Share Transit Gateway with Resource Access Manager

This time, I would like to describe how to share a Transit Gateway created with a Site-To-Site VPN connection with other AWS accounts.

A simple configuration diagram is shown below.

It is assumed that the Site-To-Site VPN connection and Transit Gateway have already been created.

References : How to connect to AWS via Site-to-Site VPN using Juniper SRX300

The tasks to be performed are as follows:

(1) Work on the AWS account A

  1. Creating a Resource Share

(2) Work on the AWS account B

  1. Accepting an invitation
  2. Creating a Transit Gateway Attachment

Resolve names by referencing the AWS inbound resolver from the on-premises Windows DNS Server

In an environment using split-brain DNS, name resolution for resources within AWS is performed from an on-premises DNS server via a private network.

Create an environment with the configuration shown in the image below.

The tasks to be performed are as follows:

(1) Work on the AWS side

  1. Creating Lambda Function
  2. Issuance of official certificates
  3. Creating an ALB
  4. Configuring route53

(2) Work on the On-Premise side

  1. Configuring a Conditional Forwarder

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