Typically, you’d have a bastion host to connect to your servers to do some manual operations tasks. For years, users relied on firewalls and bastion hosts to securely access cloud assets, but these options had security and management overhead tradeoffs. Many things have changed since then and more specifically VPCs have become the default and recommended way to use cloud resources, all using private IPs. The AWS public cloud began with Amazon EC2-Classic and networking was much simpler back then, since you could only launch an Amazon EC2 instance with a public IP. It must also be supported in a secure, auditable manner, often programmatic or via scripting, and with strong access controls. Interactive shell access to cloud or data center environments is a must in many corporate businesses.
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