From a local machine (for example, your laptop), run the following SSH command to connect to instance1. Instance2: An EC2 instance that's running MySQL Database on the default port 3306 Hostname =, Instance id = i-0123456789abcdefa Instance1: An EC2 instance that acts as a bastion host and is managed by AWS Systems Manager The database must run on an EC2 instance and use the SSM host as a bastion host. Example configuration: Use SSM host as a bastion host to create a tunnel from a local machine to a MySQL databaseĬreate a tunnel from your local machine to access a MySQL database. In the preceding example, 127.0.0.1 and localport translate to access targethost:destport. Run the following command to test access to the tunnel on the target port that you created: telnet 127.0.0.1 localport Run the following command to start the SSH tunnel: ssh -i /path/my-key-pair.pem -L localport:targethost:destportĢ. To use Session Manager to start the SSH tunnel, complete the following steps:ġ. Note: If you receive errors when running AWS CLI commands, make sure that you're using the most recent version of the AWS CLI. AWS CLI v1.16.12 or newer on your local machine.Session Manager Plugin v1.1.23 or newer on your local machine.Note: You must have the following installed to use the SSH feature: Allow SSH connections through Session Manager and meet the SSH connection requirements.Install the Session Manager plugin for the AWS Command Line Interface (AWS CLI).Complete the Session Manager prerequisites.Note: For instructions on how to access your EC2 instances with a terminal or a single port forwarding, see Setting up Session Manager. Ease of use: Access resources in your private VPC directly from your local machine.This removes the need to open any inbound rule publicly. The local resource must allow inbound traffic from only the instance that acts as the bastion host. This allows you to use Session Manager without any inbound connections. Increased Security: This configuration uses one Amazon Elastic Compute Cloud (Amazon EC2) instance (the bastion host), and connects outbound port 443 to Systems Manager infrastructure.The following points are benefits of this configuration: A managed instance that you create acts as a bastion host, or gateway, to your AWS resources. Session Manager tunnels real SSH connections, and allows you to tunnel to another resource within your Amazon VPC directly from your local machine. Session Manager uses the Systems Manager infrastructure to create a session with an instance similar to SSH. For more information, see Starting a session (port forwarding to a remote host). Port forwarding is an alternative to the following steps. This feature is supported on SSM Agent versions. Session Manager is a capability of AWS Systems Manager that lets you use port forwarding for remote hosts. To create an SSH tunnel, use Session Manager. SSH tunnels allow you to forward connections made to a local port to a remote machine through a secure channel. SSH tunneling, or SSH port forwarding, is a way to transport data over an encrypted SSH connection.
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