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System Design Masterclass · Cloud Infrastructure
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A bastion host is a single hardened server you SSH into before reaching private infrastructure. It works well for small teams. But in an enterprise with 500 engineers, 50 environments, and strict compliance requirements, a single SSH box does not scale.
A jump server is the enterprise evolution. It is a centralized access platform, often a managed product like Teleport, StrongDM, or HashiCorp Boundary, that provides authenticated, authorized, and audited access to all infrastructure. It handles identity (who is this person?), authorization (what can they access?), session recording (what did they do?), and protocol support (SSH, RDP, database protocols, API).
The distinction matters more conceptually than technically. A bastion is a simple SSH relay. A jump server is an access management platform. In practice, many people use the terms interchangeably, but the capabilities are very different. Teleport's 2024 State of Infrastructure Access report found that 67% of security incidents involving remote access were caused by over-provisioned permanent credentials, exactly the problem that jump servers with just-in-time access solve.
| Feature | Bastion Host | Jump Server Platform |
|---|---|---|
| Protocol | SSH only | SSH, RDP, DB, K8s, web apps |
| Auth | SSH keys + maybe MFA | SSO, RBAC, just-in-time access |
| Audit | Manual logging | Session recording, command capture |
| Scale | Single server | Clustered, highly available |
| Access control | IP-based security groups | Identity-based policies |
| Maintenance | You patch it | Vendor-managed (SaaS options) |
| Cost | $8-15/month | $0-15/user/month |
Modern jump server products:
Just-in-time (JIT) access: Modern jump servers support temporary access grants. An engineer requests access to production for 30 minutes to debug an issue. A manager approves. Access is granted for exactly 30 minutes, then automatically revoked. No permanent credentials floating around.