Security Groups Question

Question

I'm very new to AWS, so apologise if I am asking what might be a ridiculous question.

I am trying to understand more about security groups. Based of what I found from reading various documentations... what I understand is there are two types of security groups. One is EC2-VPC which is an EC2 security group type and another is a VPC Security group. We can attach these security group types to other aws services such as ELB/NLB,S3 etc...am I wrong?

Also came across a RDS security group. Is that a different type of security group? How many types of Security Groups are there?

Answer

The basis of a Security Group is a VPC.

Because security groups can be configured for resources running on VPC, you will see descriptions of security groups for various resources such as EC2 and RDS, but these are simply descriptions of the same thing for each AWS resource they apply.

S3 does not have a security group. This is because S3 does not operate within VPC.

I hope this helps your understanding.

Answer

To add to their great answers, Security Groups our AWS's host based firewalls, within the VPC. With different labels, according to the resource their protecting:

https://docs.aws.amazon.com/vpc/latest/userguide/vpc-security-groups.html

Security Groups Question

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