Bastion hosts provide remote access to private networks from an external network, commonly used as SSH proxy servers for system administration. They offer a convenient and secure path through protected network perimeters but have become outdated in today's decentralized computing environment. Bastions work by providing a bridge between the public internet and private subnets, using a locked-down single-purpose system that strips away unnecessary applications and protocols. However, this approach creates new security risks due to SSH's limitations, such as key management issues and lack of built-in integration with identity providers. To secure bastion hosts, it is recommended to harden them by removing unnecessary components, tighten network controls by restricting access to authorized users, and secure SSH using multi-factor authentication and regular audits. Alternatives to bastion hosts include Zero Trust Network Access solutions like Twingate, which provide more secure and decentralized remote access control without requiring public-facing IP addresses.