Security Groups

Question 1

What does a SG control?

Answer 1

inbound and outbound traffic

Question 2

What is the instance firewall?

Answer 2

SGs

Question 3

What do SGs regulate?

Answer 3

Acces to ports, Authorized IP ranges (v4 and v6)

Question 4

Can a SG be attached independently?

Answer 4

Yes, to multiple instances

Question 5

Is a SG locked down?

Answer 5

Yes, to a region / VPC combination

Question 6

What does an instance receive when the SG blocks the traffic?

Answer 6

Nothing, the SG lives outside the EC2

Question 7

What SG is always good to maintain separated?

Answer 7

SSH access

Question 8

What usually means an application time out?

Answer 8

A SG issue

Question 9

What means a connection refused error?

Answer 9

An application error or it’s not launched

Question 10

How is all inbound traffic treated by SGs by default?

Answer 10

blocked

Question 11

How is all outbound traffic treated by SGs by default?

Answer 11

authorized

Question 12

SGs can authorize other SGs?

Answer 12

Yes, it is commonly used to allow another applications