Once a security group has been created, access to all the ports associated with the security group is denied. Security rules are then added to the group in order to allow only certain type of traffic, thereby securing the Network. The rules are defined using Network traffic attributes such as protocol (TCP, UDP, or ICMP), the direction of traffic flow, for example, entering the port (ingress) or exiting the port (egress), and the application port, that is, the UDP or TCP socket ports.
For this recipe, you will need the following information:
The name of the security group to which the rules will be added
The type of protocol to be allowed
The direction of the traffic, that is, originating from the port (egress) or destined to the port (ingress)
The protocol port or port range that should be allowed