Description: A security group rule is a set of guidelines that defines the allowed inbound and outbound traffic for a security group in cloud computing environments. These rules are fundamental for the security of instances, as they control access to cloud resources. Each security group acts as a virtual firewall that protects instances by allowing or denying traffic based on specific criteria such as IP addresses, protocols, and ports. Rules can be configured to allow traffic from specific IP addresses or ranges, as well as to restrict access to certain ports, providing granular control over the security of applications and services deployed in the cloud. Additionally, security group rules are dynamic and can be modified in real-time, allowing administrators to adjust security according to the changing needs of the infrastructure. In summary, security group rules are an essential tool for managing security in cloud environments, ensuring that only authorized traffic can access critical instances and resources.
