Definition: A security group controls the traffic that is allowed to reach and leave the resources that it is associated with. For example, after you associate a security group with an EC2 instance, it controls the inbound and outbound traffic for the instance. Source: Amazon Source reference: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-security-groups.html Example: The following implementation is an example on how this specific Architecture Building Block (ABB) can be instantiated as a Solution Building Block (SBB): Security Groups are used for blocking the ingress traffic by default and configure only IPs and ports for the services exposed to outside. eira:iopDimension: Structural IoP LOST view: TVI-Networking Infrastructure Enablers [Traceability] eira:iopSaliency: The Firewall ABB is salient for technical interoperability because it permits control of the traffic between the public administration and the different information providers and information consumers. Identifier: http://data.europa.eu/dr8/AWSSecurityGroupTechnologyService eira:ID: http://data.europa.eu/dr8/AWSSecurityGroupTechnologyService ABB name: eira:FirewallTechnologyService EIRA concept: eira:SolutionBuildingBlock