Creating a Security Group for the Load Balancer
Understand how to create and configure a security group for a load balancer in AWS using CLI. Learn to set inbound rules allowing user HTTP access and outbound rules securely targeting WordPress instances with appropriate security group references.
Similar to what we did for the RDS database, we also need to create a security group for the load balancer to use it effectively.
Properties of the security group
Before we create the security group, let’s quickly discuss which rules are needed. The load balancer sits between the user and the WordPress instances and forwards HTTP traffic on port 80.
Inbound rules
First of all, we need to allow our users to access the load balancer, so we need an ingress rule that allows traffic from everywhere. It needs to support HTTP, which is based on TCP. Therefore, the ingress rule should be the following:
Ingress Rule
Destination | Port | Protocol |
|
| TCP |
Outbound rules
The load balancer also needs to be able to access our WordPress instances. Therefore, we need an outbound rule ...