Set up the ec2 integration.
Reduce the possibility of a breach by checking EC2 security groups for inbound rules that allow unfettered access to TCP port 445, commonly used by client/server applications, and restrict access to IP addresses that require this port.
Malicious activity, such as denial-of-service (DoS) or man-in-the-middle attacks (MITM), can occur when permitting unrestricted Common Internet File System (CIFS) access. TCP port 445 is the port commonly used by client/server applications as a means of communication between network nodes over TCP.
Follow the Security group rules docs to learn how to add a security group rule that will restrict access to IP addresses that require a specific port.
revoke-security-group-ingress to remove inbound rules that allow unrestricted access to port 445.
aws ec2 revoke-security-group-ingress --group-name group-name --protocol tcp --port 445 --cidr 0.0.0.0/0
authorize-security-group-ingress to add new inbound rules that restrict CIFS access.
aws ec2 authorize-security-group-ingress --group-name your-group-name --protocol tcp --port 445 --cidr 192.0.2.0/24