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Set up remote access to the customer's Amazon EC2 instance

WSO2 does all the Managed Cloud deployments in an Amazon Virtual Private Cloud (Amazon VPC). A VPC enables you to launch Amazon Web Services (AWS) into a virtual network that you define. A VPC improves the security of your data by providing network-level control and isolation for the AWS. You can keep your data and configurations in a private space and expose them through the DMZ. This virtual network closely resembles a traditional network but with improved security and scalability. 

We access the customer's Amazon EC2 instance over SSH only, with a Bastion host working as the SSH gateway. The Bastian host can either reside in the VPC or in the customer's data center as depicted in the diagram below:

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The customers can either use their own SMTP servers, or allow WSO2 to use Amazon SES. If the customer does not use Amazon SES, s/he is to share the SMTP credentials of the customer's email server

 Shown below is how an SMTP server in the customer's data center communicates with the WSO2 EC2 instance in the Amazon VPC.:

Diagram: SMTP server communicates with the WSO2 EC2 instance

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NTP is shorted for Network Time Protocol, which is a networking protocol for synchronising time over a network. Shown below is how the NTP server in the customer's data center communicates, over NTP, with the WSO2 virtual machines in the Amazon VPC. The customer is to share the NTP server details with WSO2 and ensure that the virtual machines where the WSO2 products are running on can reach the NTP server through the customer's firewall.

DiagramNTP server communicates with the WSO2 EC2 instance

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