I'm trying to do a POC of AWS Systems Manager Session Manager Port Forwarding session but I can't seem to be able to start the PortForwarding session even though starting a normal session works.
A session starts and works as intended aws ssm start-session --target i-xxxxxxxxxxx
aws ssm start-session --target i-xxxxxxxxxxx \
--document-name AWS-StartPortForwardingSession \
--parameters '{"portNumber":["80"],"localPortNumber":["3001"]}'
The IAM role has the AWS policy AmazonSSMManagedInstanceCore and a sessions manager policy
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"ssmmessages:CreateControlChannel",
"ssmmessages:CreateDataChannel",
"ssmmessages:OpenControlChannel",
"ssmmessages:OpenDataChannel"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"s3:GetEncryptionConfiguration"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"kms:Decrypt"
],
"Resource": "arn:aws:kms:us-east-2:xxxxxxxxxxx:key/xxxxxxx-xxxx-xxxx-xxxx-xxxxxxx"
}
]
}
I expected the session to establish tunnel and start forwarding port 80 to my local port 3001
Instead I get the following error:
SessionId xxxx-xxxxxxxxxxx
----------ERROR-------
Encountered error while initiating handshake. SessionType failed on client with status 2 error: Failed to process action SessionType: Unknown session type Port```
Here is what I am trying to accomplish:
https://aws.amazon.com/blogs/aws/new-port-forwarding-using-aws-system-manager-sessions-manager/