Jelastic - Restrict direct access to a container behind a load balancer-CodePudding

I'm using Jelastic with two environments, one for my frontend and one for my backend.

Each environment has a Nginx load balancer with an IPv4, then an application server. For the backend (api), the application server is Spring-boot and for the frontend, it is Node.js

However, I have added IPv4 on each of my application servers to have direct access with my deployment scripts.

The concern now is that if I go directly through these IPs and no longer through the respective load balancers, I can still access my application but the connection is not secure.

I tried to close the incoming ports 80/443 on the application servers, but it doesn't change anything, I still access with the IP.

Here is an image that quickly summarizes the problem (the ip used are not real):

Thank you for your help

CodePudding user response：

You can restrict access to your spring-boot by configuring the firewall to allow only access from your load balancer. You can follow that