Benefits Of AWS NAT Gateway
NAT Gateways provide several benefits for users of Amazon Web Services (AWS). Some of the key benefits include:
- Improved security: NAT Gateways enable instances in private subnets to access the Internet while preventing Internet-based access to those instances. This helps to improve security by reducing the attack surface of your VPC.
- Simplified network architecture: NAT Gateways allow you to simplify your network architecture by eliminating the need for a bastion host or VPN connection to access instances in private subnets.
- Automatic scaling: NAT Gateways are automatically scaled based on your usage, so you don’t have to worry about managing the service yourself.
- High availability: NAT Gateways are designed for high availability, with multiple redundant gateways in each Availability Zone to ensure that traffic continues to flow even if one gateway goes offline.
- Cost-effective: NAT Gateways are cost-effective, with pay-as-you-go pricing and no upfront costs. They also offer a lower-cost alternative to using (Vitual Private Network) VPN connection or a bastion host to access private instances.
Amazon Web Services – Introduction to NAT GatewaysAWS NAT Gateway Use Cases
To access the Internet, one public IP address is needed, but we can use a private IP address in our private network. The idea of NAT is to allow multiple devices to access the Internet through a single public address. To achieve this, the translation of a private IP address to a public IP address is required. Network Address Translation (NAT) is a process in which one or more local IP address is translated into one or more Global IP address and vice versa in order to provide Internet access to the local hosts. Also, it does the translation of port numbers i.e. masks the port number of the host with another port number, in the packet that will be routed to the destination. It then makes the corresponding entries of IP address and port number in the NAT table. NAT generally operates on a router or firewall.
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