EC2 Security groups

There is a security group on your screen.

See more about security groups:

• EC2 Security Groups

• Creating a Security Group

CLI for AWS Security groups

As for CLI for working with AWS Security groups, see this article: Creating, Configuring, and Deleting Security Groups for Amazon EC2 - AWS Command Line Interface

$ aws ec2 create-security-group --group-name my-sg --description "My security group" --vpc-id vpc-1a2b3c4d
{
    "GroupId": "sg-903004f8"
}

$ aws ec2 authorize-security-group-ingress --group-id sg-903004f8 --protocol tcp --port 3389 --cidr 203.0.113.0/24

The following command adds another rule to enable SSH to instances in the same security group.

$ aws ec2 authorize-security-group-ingress --group-id sg-903004f8 --protocol tcp --port 22 --cidr 203.0.113.0/24

To view the changes to the security group, run the describe-security-groups command.

$ aws ec2 describe-security-groups --group-ids `sg-903004f8`

O/P is:

{
    "SecurityGroups": [
        {
            "IpPermissionsEgress": [
                {
                    "IpProtocol": "-1",
                    "IpRanges": [
                        {
                            "CidrIp": "0.0.0.0/0"
                        }
                    ],
                    "UserIdGroupPairs": []
                }
            ],
            "Description": "My security group"
            "IpPermissions": [
                {
                    "ToPort": 22,
                    "IpProtocol": "tcp",
                    "IpRanges": [
                        {
                            "CidrIp": "203.0.113.0/24"
                        }
                    ]
                    "UserIdGroupPairs": [],
                    "FromPort": 22
                }
            ],
            "GroupName": "my-sg",
            "OwnerId": "123456789012",
            "GroupId": "sg-903004f8"
        }
    ]
}

P.S. awless.io - A Mighty CLI for AWS

There is also a bit outdated but still convenient CLI tool: wallix/awless: A Mighty CLI for AWS

A Mighty CLI for AWS http://awless.io/

Here the Medium post about it