Security Group
A security group is a collection of access control rules for cloud resources, such as cloud servers, containers, and databases, that have the same security protection requirements and that are mutually trusted. After a security group is created, you can configure access rules that will apply to all cloud resources added to this security group.
- Security group Sg-A has a custom inbound rule to allow ICMP traffic to ECS-A from your PC over all ports. However, the security group does not have rules that allow SSH traffic to ECS-A so you cannot remotely log in to ECS-A from your PC.
- If ECS-A needs to access the Internet through an EIP, the outbound rule of Sg-A must allow all traffic from ECS-A to the Internet.
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