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Aws bastion host vs nat instance1/14/2024 ![]() Where as instances are a generic linux AMI that is configured to handle nat traffic. There’s a clear winner with this, in that NAT gateways are specifically designed for this purpose and are optimised to handle nat traffic. ![]() NAT instances on the other hand require updating for operating systems, software patches, virus updates etc…. NAT gateways require no maintenance as they are managed by AWS as a service. t2Micro will have a smaller bandwidth allowance compared to a t2Medium. NAT gateways each have a bandwidth limit upto 45Gbps, where as NAT instances are totally dependent on the instance type they run on. This increases the complexity compared to simply creating multiple NAT gateways across AZs. NAT instances can achieve high availability but you’ll have to write a script to handle the failover when it occurs. If you create NAT gateways across multiple availability zones then your instances we continue to be served even if one gateway fails. Keep reading and I’ll show you how… Availability We’ll also look at how to create a NAT gateway & instance. We’ll go into the details of exactly why you should use gateways as opposed to instances later in this article. Gateways were specifically designed to replace them and be easier to use. Why so easy to answer? In short, NAT instances are on their way out of regular use. After that you’re next question is probably going to be which one should I use? The first and most logical question you’ll be asking yourself and what most likely led you to read this blog post is what are the differences between NAT Gateways and NAT instances. Or you are using AWS and want to learn more about NATs then this is the article for you. The article will take just 10 minutes to read and after doing so you’ll have all you need to know to answer any basic question around NAT gateways & instances to pass the AWS certifications. ![]() NAT Instances which are user maintained and NAT Gateways which are managed by AWS.Ī typical reason for wanting this functionality would be for updating software running on instances that reside within a private subnet. What is a NAT? Network Address Translation (NAT) is a means for resources that reside in private subnets to access the internet in a secure fashion. It’s important to have a working knowledge of both and the reasons why you would choose one over the other. We will examine the two flavours of NAT available on AWS. In this article we take a deep dive look into Network Address Translation or NAT for short. In our first article we learnt the basic concepts of VPCs and in the second we built a VPC using both the VPC wizard and totally from scratch. If you’ve been following my series on VPCs then by now you’ll have a decent understanding of what one is. The best part…this course is totally free of charge! Welcome to part 10 of a multiple part course on passing your AWS Architect, Developer & Sysops Associate exams. ![]()
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