[AWS] VPC – NAT Gateway

NAT (Network Address Translation)

NAT remaps source IPs or destination IPs. (It translates private IPs to public IPs and vice versa.)

  • Static NAT
    • A private IP is mapped to a public IP at a 1:1 ratio. (such as Internet Gateway).
  • Dynamic NAT
    • A range of private IPs are dynamically mapped to one or more public IPs (Home router or NAT Gateways).
    • To achieve high availably, create one dynamic NAT per AZ.
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[AWS] VPC – Subnets and Routing Tables

Subnets are the logic network that you group your resources in a single local network. Communication in and out of a subnet is of critical importance, and a routing table contains the rules on how traffic can be directed.

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