Thursday, February 20, 2020

pros and cons of using private subnet

I'm not sure if this is the right sub to ask this question because this is about AWS VPC, but anyway... I'm trying to improve an existing Elastic Beanstalk setup. There's a dozen instances behind a load balancer. Each instance has a public IP, although I've now closed it off such that only the load balancer can connect to them. Question: what are the benefits or disadvantages of leaving the instances inside a public subnet? I can move the instances to a private subnet, but they will no longer have Internet access. We'll have to pay for a NAT Gateway. I can't understand why it's more expensive to use private-facing instances. Maybe I'm missing something?



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