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I launched the majority of my EC2 instances with network interfaces that automatically assign public IP addresses. Now that I no longer want them to have public addresses, is there any way to disable this setting without having to create new interfaces?

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If you launch your EC2 inside a VPC, you can disable auto-assigning public IP address to subnet.

If you launch classic EC2, you can't do it.

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-instance-addressing.html#differences

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  • The problem is that when launching a machine, you can override the subnet setting. The question is, how can this override be removed? – Matthew Dec 4 '15 at 19:22

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