Elastic Compute Cloud (EC2)

Question 1

What are the features of Security Group?

Answer 1

1) All inbound traffics are blocked by default
2) All outbound traffics are allowed
3) Changes to the security groups are effected immediately
4) You can have any number of EC2 instances within a security group
5) Security Groups are stateful (If you create inbound rule it automatically allowed back)
6) You cannot block specific IP address using SG use Network Access Control List
7) You can specify allow rules but not deny