So what would you think if I told you that I can safely, securely and quickly get access to almost any of my EC2 instances by opening a terminal and typing in: Photo by Bjarne Henning Kvaale from FreeImages. When that happens, you want authorised users to be able to get shell access quickly and conveniently. If an important production issue needs debugging, sometimes getting a shell on an EC2 instance is the best way to get to the bottom of an issue. In an ideal world, nobody should ever need to get a shell on such an instance. But every step to secure an instance makes it less convenient to use. It’s a classic security vs convenience tradeoff: AWS best practices would have you put important infrastructure in private subnets with restricted routing and no Internet-facing IP addresses. Getting a shell on an EC2 instance can be a pain.
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