Why can't I connect to my AWS Cloud9 environment using an Amazon EC2 instance running Amazon Linux 2 as the jump host?

Last updated: 2020-01-31

I tried connecting to my AWS Cloud9 environment using an Amazon Elastic Compute Cloud (Amazon EC2) instance running Amazon Linux 2 as the jump host, but I get a connection error. Why can't I connect?

Short Description

AWS Cloud9 uses the netcat (nc) command to connect to a jump host (also known as a jump server). However, netcat is not installed by default on EC2 instances running Amazon Linux 2.

Resolution

1.    Manually install the netcat package on your EC2 instance running Amazon Linux 2 by using the following command:

yum install nc

2.    Verify that the user account ec2-user has a PATH to the location of the command nc.

Note: You can also use an EC2 instance running the Amazon Linux AMI, which has netcat installed by default.

Creating an SSH Environment

Cannot Open an Environment

Netcat 1.10 (netcat website)

Did this article help you?

Yes
No

Anything we could improve?

Let us know

Need more help?

Contact AWS Support