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Different Ways Of Configuring NAT Gateways In AWS






NAT Gateway





Different Configurations Of NAT Gateway




  1. Public subnet and private subnet in the same Availability Zone
  2. 2 public subnet, 2 private subnet and 1 NAT gateway
  3. 2 public subnet, 2 private subnet and 2 NAT gateways



Public Subnet And Private Subnet In The Same Availability Zone




  1. NAT gateway is launched in public subnet
  2. EC2 instance is launched in private subnet
  3. An entry of NAT gateway is added in the route table of the private subnet
ProsCons
Less costIf Availability Zone goes down, there is no backup plan


Picture showing the representation of scenario Public Subnet And Private Subnet In The Same Availability Zone

Click to Enlarge


2 Public Subnet, 2 Private Subnet And 1 NAT Gateway




Availability Zone (AZ1)Availability Zone (AZ2)
Private subnet (private-subnet-1)Private subnet (private-subnet-2)
Public subnet (public-subnet-1)Public subnet (public-subnet-2)




  1. NAT gateway is launched in public-subnet-1
  2. EC2 instance is launched in private-subnet-1
  3. Another EC2 instance is launched in private-subnet-2
  4. Entry of NAT gateway is added in the route table of private-subnet-1 and private-subnet-2


Picture showing the representation of the scenario 2 Public Subnet, 2 Private Subnet And 1 NAT Gateway

Click to Enlarge


2 Public Subnet, 2 Private Subnet And 2 NAT Gateways




Availability Zone (AZ1)Availability Zone (AZ2)
Private subnet (private-subnet-1)Private subnet (private-subnet-2)
Public subnet (public-subnet-1)Public subnet (public-subnet-2)




  1. 2 NAT gateways are launched in public-subnet-1 and public-subnet-2
  2. EC2 instance is launched in private-subnet-1
  3. Another EC2 instance is launched in private-subnet-2
  4. Entry of NAT gateway 1 is added in the route table of private-subnet-1
  5. Entry of NAT gateway 2 is added in the route table of private-subnet-2


Picture showing the representation of scenario 2 Public Subnet, 2 Private Subnet And 2 NAT Gateways

Click to Enlarge




Posted By  -  Karan Gupta
 
Posted On  -  Friday, July 29, 2022

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