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.