1. Planning.

• Assessment
  Begin by identifying who needs SSH access, the resources they need, and why they need it. Document existing access rights and see if they can be minimized or eliminated. For better visibility, consider using a privilege discovery tool.
• Policy creation
  Develop clear policies for both granting and revoking access. Include parameters on who can request access, in what situations, and for how long. For roles with privileged access, establish time-bound parameters.
• Source of truth
  Synchronize your SSH system with an Identity Provider (e.g., Okta, Google Workspace, Azure AD, OneLogin). This acts as the definitive source for identities, and using individual identities over shared accounts allows better control over authorization and more accurate auditing.

2. Execution.

• Self-serve access requests
  Simplify the process by having users request access through a system rather than individuals. Drive adoption rates by integrating with IM platforms like Slack or MS Teams. Make sure requests specify who is asking for access, what kind of service/resource/role they need, how long they need it for, and why.

• Approval process
  SSH provides an opportunity for organizations to delegate approvals to people with more business context than the IT helpdesk. Resource owners and business unit managers often have better context for these decisions. Send approval requests through messaging platforms for prompt responses, giving approvers necessary information for an informed decision.

• Conditional approval workflows
• Implement your predefined policies into workflows that determine access rights. If-then condition assignments can streamline this–if identity group “X” requests access to “Y”, approval from “Z” is needed and “M” should be notified.

• Integrations
  Increase flexibility by integrating SSH with other IT and security systems. Automate access based on IT ticketing system status; adjust policies based on data sensitivity through linking with data classification systems. Other possibilities might include integrating with on-call schedule software for automated approvals in emergency situations, and with training systems to grant access based on training completion.
• Automated provisioning and deprovisioning  
  Learn Amazon EKS thoroughly in order to effectively grant and revoke fine-grained access automatically within the service – a crucial aspect of SSH. Ideally, manage all permissions from one place instead of creating or managing an environment for every application in your organization.
• Access methods
  For Amazon SSH, APIs are preferable for their flexibility and real-time capabilities. However, a mix may be necessary–for instance, using SAML for authentication, SCIM for user provisioning, and APIs for access control decisions.

3. Maintenance.

• Regular audits
  Regularly check access logs to ensure SSH is functioning as expected. Look for unusual patterns or behaviors, either manually or by feeding the logs to your SIEM. Automating the user access review process can expedite evidence collection, ensure adherence to relevant industry regulations and standards, and delegate reviewers.
• User training
  Teach users, particularly those with privileged access, about the importance of least privilege and SSH and how they operate. Make sure users know how to request access when necessary.
• Feedback loop
  Consistently review your SSH procedures and seek feedback from users and IT staff to identify areas for improvement.

By following this methodical approach, you can efficiently implement a robust Just-in-Time Access system for Amazon EKS using SSH.