Open All Ports Protocols

Determine if security group has all ports or protocols open to the public

Security groups should be created on a per-service basis and avoid allowing all ports or protocols.

Follow the appropriate remediation steps below to resolve the issue.

Log in to the AWS Management Console.
Select the “Services” option and search for EC2.
Scroll down the left navigation panel and choose “Security Groups” under “Network & Security”.
Select the “EC2 Security Group” that needs to be verified.
Scroll down the bottom panel and choose “Inbound rules”. Verify the value for “Source” column and if any rule have value set to “0.0.0.0/0” or “::/0 " then the selected “Security Group” has one or many ports open to the public.
Repeat steps number 2 - 5 to verify other “Security Groups” in the selected AWS region.
Navigate to “Security Groups” under “Network & Security” and select the “Security Group” that needs to be modified to restrict the access to specific IP address.
Scroll down the “Security Group” page and select the “Inbound rules” and click on the “Edit inbound rules” button to the right.
In the “Edit inbound rules” tab select the “MyIP” from the “Source” column of type “SSH” to allow inbound traffic only from your current IP address.
In the “Edit inbound rules” tab select the “Custom” from the “Source” column if you want to specify a “static IP” address of the permitted host along with “Description” for the “Security Group” rule.
Click on the “Save rules” button to make the necessary changes.
Repeat steps number 7 - 11 to modify the security group to add a specific port and protocol to allow.