Security teams know it. Ops teams know it. Yet, many still rely on them, hoping the uptime gods are kind. But when a bastion host fails, access dies. Projects freeze. On-call escalations light up like a warning flare. High availability is not optional — it is the baseline. The real question is how to achieve it without stacking complexity and cost.
The Problem with Bastion Hosts
Traditional bastion hosts have served as control points for SSH and RDP access to private infrastructure. But they bring heavy operational overhead. You patch them. You monitor them. You scale them. You harden them. And still, they remain choke points — both for availability and for attackers. Moving traffic through a single machine or even a small cluster limits scalability. If that front door is blocked, whether by a crash, misconfig, or attack, every system behind it is cut off.
High Availability Must Be Built-In
Replacing a bastion host should not mean building your own failover system. Layering load balancers, multiple availability zones, and manual session draining makes the architecture more fragile. True high availability comes from removing the very need for an exposed jump point. It should be elastic by design. If one gateway fails, another should take over instantly. Zero downtime. Zero manual intervention.