How do I create public and private subnets in AWS VPC?

Pick VPC, add subnets: /24 CIDRs in different AZs. Public gets IGW route; private doesn't—but add NAT for outbound.

What's the point of a bastion host in AWS VPC?

Your SSH jumpbox in public subnet. Keeps privates dark, auditors happy. Proxy web traffic too, like here.

Does this AWS VPC setup need a NAT Gateway?

Not for inbound. But privates need it for apt updates—$32/month min. Skip if static.

AWS VPC Public/Private Subnets: The Setup Newbies Botch Every Time

Over 80% of AWS breaches trace back to sloppy VPC configs. Here's the no-BS guide to public/private subnets that actually works—before you leak your data.

DevTools Feed Apr 03, 2026 3 min read 11 views

AWS VPC diagram showing public subnet EC2 proxying to private subnet server via Nginx

⚡ Key Takeaways

Separate public/private subnets block 80% of newbie breaches via bastion access. 𝕏
Nginx proxy_pass routes private HTTP smoothly—free-tier friendly. 𝕏
Watch NAT bills: AWS's hidden tax on 'secure' privates. 𝕏

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#AWS VPC #AWS networking #EC2 bastion #Nginx reverse proxy #public private subnet

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