Attaching a Security Group to EFS Mount Targets

Steps to attach the security groups

We have already created the security group efs-access with the matching security group ingress rule. Now, it’s time to attach this security group to our EFS mount targets. We will perform the following steps:

1. To attach the security group, we can use the modify-mount-target-security-groups CLI command.
2. To use it, we need to specify the mount target via --mount-target-id and the security group(s) via --security-groups. The --security-groups parameter only takes security group IDs.
3. To get the security group ID, we could either copy it from last lesson or use the describe-security-groups command again: