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Is it possible to have an EC2 VPC with a public subnet and a private subnet, but without having to have a NAT box? The servers on the private network would not need to talk to the outside world, just to a load balancer on the public network (which also has a private address).

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Yes, if the servers in your private subnet really never need to talk to the outside world (they don't download software updates? Don't use public NTP servers?), then you don't need a NAT gateway for them. And the servers in your public subnet don't need a NAT box, they will route through an EC2 Internet gateway.

  • How, then, do I delete the NAT instance? Or if I can't delete it, is terminating it sufficient to not get charged for it? – Dan Ellis Aug 20 '13 at 5:35
  • Remove it from your routing tables and then terminate it. – Mike Scott Aug 20 '13 at 12:11

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