Bastion hosts have long been a mainstay for managing secure connections into private infrastructure. However, as systems scale and the cloud-native paradigm grows, the cracks in traditional bastion setups become noticeable. Maintenance complexity, security vulnerabilities, and operational inefficiencies make teams question whether there's a better way forward.
This blog tackles how to build a bastion host replacement proof of concept (PoC), demonstrates modern best practices, and introduces an approach that’s simpler, more secure, and more developer-friendly.
What Makes Bastion Hosts Problematic?
Traditional bastion hosts act as centralized gateways to private networks. While useful, they’ve become a bottleneck in many modern environments. Here’s why:
Operational Overhead
Maintaining bastion hosts often requires manual intervention—patching, scaling, and configuring can quickly become a chore. This burden scales poorly in distributed systems or teams managing multi-cloud environments.
Security Concerns
Because all connections pass through the bastion, it becomes a single point of failure and an attractive target for attackers. Implementing strict firewall rules or multi-factor authentication (MFA) only reduces, but doesn’t eliminate, risks like compromised credentials.
Lack of Fine-Grained Access
Bastion hosts typically don’t offer granular session tracking or the ability to enforce least-privilege access at scale. With shared SSH keys or accounts, accountability and auditability often slide out the window.
Building a Modern Bastion Host Replacement PoC
Replacing bastion hosts requires combining ease of use, scalability, and layered security. Here’s how you can build a basic PoC:
1. Define Access Control Needs
Start by outlining the kinds of users or systems that will require access. Separate these into tiers, such as:
- Automated systems (e.g., CI/CD tools).
- Developers needing SSH access for debugging.
- Temporary users, like contractors or auditors.
For each group, specify:
- The frequency of access (continuous vs. occasional).
- Required permissions.
- Necessary audit information.
2. Leverage Identity-Based Access
A bastion replacement PoC should eliminate static credentials like shared SSH keys. Instead, integrate identity-based authentication using systems such as:
- IAM (Identity and Access Management) roles in AWS, GCP, or Azure.
- SSO (Single Sign-On) providers with short-lived credentials.
Identity-based access eliminates the risk of static passwords lingering in unauthorized hands.
3. Replace SSH with Zero Trust Principles
Incorporate zero trust principles by ensuring that:
- Access is verified dynamically at every session request.
- Users and services authenticate themselves using ephemeral access tokens.
- Applications or proxies enforce strict rules, like IP allow lists and context-aware policies.
Leverage connection proxies like OpenZiti or Tailscale to route traffic securely and confirm identity without exposing private IPs.
4. Build Session-Aware Auditing
Implement a system that logs and monitors every connection. This should track:
- Who accessed what resource.
- The duration of their activity.
- A detailed transcript of commands or actions performed, when applicable.
Real-time monitoring can prevent and detect unauthorized activity faster than batch-access log reviews.
5. Automate Resource Discovery and Policies
A modern bastion host replacement also centralizes resource policies without manually updating YAML files or worrying about outdated configurations. Adopt tools that can autodiscover resources and apply prebuilt policies automatically.
Testing the PoC
Once built, test your PoC against a typical day in your organization:
- Can a developer seamlessly access the resources they need without contacting the ops team?
- Does the system lock unauthorized users, even when they simulate stolen logins?
- Are audit logs granular enough for compliance needs?
- Does the removal of static SSH keys reduce operational noise and ticket churn?
Remote debugging and temporary access workflows are great initial use cases.
A Smarter, Faster Solution
While creating a bastion host replacement PoC can help validate your efforts, the process is still resource-intensive for teams with constrained time and expertise. That’s why tools like Hoop exist: to simplify secure access for developers and teams, replacing cumbersome bastion hosts in minutes.
With Hoop, you can provision identity-driven access controls, enforce zero trust, enable session recording, and eliminate manual key management without custom configurations. It’s a ready-to-use gateway designed for dynamic teams.
Why spend weeks on a PoC when you can solve the problem today? See how Hoop lets you replace your legacy bastion host and experience modern access control now.