Security in a multi-cloud world cannot rely on one door and one lock. Bastion hosts have been the old answer to secure remote access, but they bring single points of failure, complex admin overhead, and expanding attack surfaces. Teams now run workloads across AWS, Azure, and GCP at the same time. The old patterns break under the speed and sprawl of modern infrastructure.
A bastion host sits in the middle of your networks, forcing all users to route through it. This hub model becomes a bottleneck for scale and a target for attackers. It also demands constant patching, logging, and secret rotation. In multi-cloud deployments, that complexity multiplies—each provider with its own IAM model, security groups, and networking quirks. Every extra line of configuration is another place to make a critical mistake.
An alternative is to step away from the bastion entirely and move to zero-trust, ephemeral access. This means no standing servers to manage, no static entry points, and no shared SSH keys that live beyond their need. Instead, sessions are granted only when needed, with automatic expiration and full session logging. Every access request is authenticated, authorized, and audited across clouds without manual juggling.