9- AWS-Networking-Dashboard-3

Dashboard and Counting Services A security group (SG) is a stateful firewall on each instance's network interface (ENI). In Cisco terms, it works like a reflexive ACL applied to one interface. In this video, we will create the security groups inbound and outbound. Stateful: If inbound traffic is allowed, the reply is allowed back out automatically Allow rules only: You can't write a deny rule. Anything not allowed is dropped Default: All inbound blocked, all outbound allowed Applies to: Instances / ENIs, not subnets (NACLs work at the subnet level) Source: Can be a CIDR or another SG, e.g. "allow from the web-tier SG" #awsnetworking #aws #itnetworking #itnetworklearning #ec2instance #SecurityGroup #bastions