NAT¶

• used in a public vpc subnet to enable instances in private subnet outbut ipv4 traffic to the internet
• supports ACLs
• supports flow logs

Nat Instance¶

• dedicated ec2 instance
• port forwarding
• can be used as bastion host
• supports SG attachment

Nat Gateway¶

• aws service
• higher availabilty
• higher bandwith
• less ops needed