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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