Security group
A security group is a virtual firewall configuration that controls permitted inbound and outbound network traffic for associated cloud resources.
Amazon Web Services in Action, Third Edition: An in-depth guide to AWS
An AWS security group is a virtual firewall configuration that controls inbound and outbound traffic for associated resources.
- How it is used
- Controls network access to application components such as EC2 instances, databases, load balancers, and EFS mount targets.
- How deep it goes
- Defines rule fields and defaults, then works through CloudFormation configurations and traffic tests; does not detail firewall internals.
- Examples
- Uses a WordPress database rule, an ICMP ping test, and client-group rules for EFS and Redis.
- What you can do after
- Build it from scratch with CloudFormation rules that admit required clients and ports, then test or diagnose connectivity.
Build Python Web Apps with Streamlit
A security group is an AWS virtual firewall that controls inbound and outbound traffic for network resources.
- How it is used
- Controls traffic to and from EC2 instances during an Elastic Beanstalk application deployment.
- How deep it goes
- Defines the virtual-firewall role and deployment placement but does not detail individual traffic rules.
- Examples
- Uses a deployed Streamlit application whose Elastic Beanstalk environment includes EC2 instances and a load balancer.
- What you can do after
- Evaluate how Elastic Beanstalk configures network protection as part of launching an application.
Read how Build Python Web Apps with Streamlit explains security group →
Secure APIs
A security group is a cloud network control that permits or restricts traffic according to sources, destinations, protocols, or ports.
- How it is used
- Applies inbound traffic restrictions within a VPC as part of network segmentation.
- How deep it goes
- Defines IP- and port-based restrictions but stops short of detailed rule configuration.
- Examples
- Uses AWS VPCs, private database subnets, API gateways, and bastion servers as concrete topology examples.
- What you can do after
- Configure layered network access that keeps sensitive services private and restricts permitted traffic.
Related concepts
- firewall ruleequivalent to · A firewall rule is a network access-control specification that permits or denies matching traffic according to defined characteristics and conditions.
- access control listcontrasts with · An access control list is a collection of rules specifying which subjects or traffic may access a resource or perform particular operations.
- ICMPconfigures · The Internet Control Message Protocol (ICMP) is an Internet network-layer protocol for exchanging control, diagnostic, delivery-status, and error messages between networked devices.
- Amazon ElastiCacheconfigures · Amazon ElastiCache is an AWS-managed in-memory caching and data-store service supporting engines such as Redis and Memcached.
- firewallkind of · A firewall is a network security system that monitors and filters communications according to rules governing which traffic is permitted or blocked.
- Amazon Relational Database Service (RDS)configured by · Amazon Relational Database Service is an AWS-managed service for deploying, operating, and scaling relational databases.
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