If configured, you can use the EC2 Serial Console for Linux to troubleshoot OS-level issues on supported Nitro-based instance types. Method 1: Use the EC2 Serial Console for Linux
SCRIPT TERMIUS AMAZON VERIFICATION
Note: Both verification steps require OS-level access of the instance. The SSH daemon (sshd) is running and listening on port 22.There's no firewall on the instance rejecting the SSH connection.For the “Connection refused” error, verify the following Note: The last two verification steps require OS-level access of the instance. SSH isn't blocked by TCP Wrappers in the instance.There isn't a firewall blocking the connection between SSH client and the EC2 instance.The route table of the instance’s subnet is configured properly to provide connectivity between EC2 instance and the SSH client.The network ACLs of instance subnet allows incoming traffic on TCP port 22 and allow ephemeral port for the outgoing traffic.The security group of the instance allows incoming traffic on TCP port 22.The instance is passing its health checks.The instance's IP address or hostname is correct.Resolution For the “Connection timed out” error, verify the following A firewall blocked and was set to reject the package instead of dropping it.The host reached the instance but there was no service listening on the SSH port.The following are common causes for this error: There's a firewall between the client and the server.Įrror message: "ssh: connect to host port 22: Connection refused".There's a firewall on the instance's operating system.The security group or network ACL doesn't allow access.The error indicates that the server didn't respond to the client and the client program gave up (timed out). This error message comes from the SSH client. Error message: "ssh: connect to host port 22: Connection timed out".
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