January 2019
Beginner to intermediate
776 pages
19h 58m
English
book
Python Network Programming
by Abhishek Ratan, Eric Chou, Pradeeban Kathiravelu, Dr. M. O. Faruque Sarker
Content preview from Python Network Programming
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NAT Gateway
To allow the hosts in our EC2 public subnet to be accessed from the internet, we can allocate an Elastic IP and associate it with the network interface of the EC2 host. However, at the time of writing this book, there is a limit of five Elastic IPs per EC2-VPC (https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Appendix_Limits.html#vpc-limits-eips). Sometimes, it would be nice to allow the host in a private subnet outbound access when needed without creating a permanent one-to-one mapping between the Elastic IP and the EC2 host.
This is where NAT Gateway can help, by allowing the hosts in the private subnet temporarily outbound access by performing a Network Address Translation (NAT). This operation is similar to the ...
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