Bastion Hosts
Including bastion hosts in your VPC environment enables you to securely connect to your Linux instances without exposing your environment to the Internet.
After you set up your bastion hosts, you can access the other instances in your VPC through SSH connections on Linux.
Bastion hosts are also configured with security groups to provide fine-grained, tightened ingress control.
MAKE SURE IT ONLY HAS PORT 22 FROM THE IP YOU NEED; NOTHING ELSE.
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