Security Group Rule

Security Group Rule in AWS is a feature that enables users to control inbound and outbound traffic for their Amazon EC2 instances. The rules are set up using the AWS Management Console, and allow users to specify which IP addresses are allowed to access the instance, as well as which ports can be accessed. Security Groups provide an additional layer of security by preventing malicious traffic from accessing the instance while still allowing legitimate connections. Furthermore, they can also be used to restrict access based on source or destination address, protocol type, and port range.