wodSSHServer Troubleshooting: Common Issues and Fixes

Migrating to wodSSHServer — Best Practices & Checklist

Preparation

1. Inventory: List all servers, services, user accounts, keys, and automation that interact with SSH.
2. Compatibility: Verify wodSSHServer supports your OS versions, authentication methods (password, public-key, Kerberos), and audit integrations.
3. Backup: Export current SSH configs, host keys, authorized_keys, and relevant application configs. Take full system backups or snapshots.
4. Stakeholders & SLAs: Identify owners, maintenance windows, and acceptable downtime.

Security & Access

1. Key hygiene: Rotate or revalidate host keys; require unique per-user keys; remove unused keys.
2. Auth policy: Prefer public-key auth with passphrases and disable root/password auth unless strictly needed.
3. MFA: Enable multi-factor authentication (if supported) for administrative accounts.
4. Least privilege: Use sudo or role-based access, restrict logins by user/group and source IPs.
5. Hardening: Apply recommended cipher/key-exchange algorithms and configuration from wodSSHServer docs.

Configuration & Testing

1. Staging environment: Deploy wodSSHServer in staging that mirrors production.
2. Configuration parity: Create reproducible configs (IaC or configuration management).
3. Automated tests: Validate login (password/key), file transfers, port forwarding, tunnels, and SFTP/Subsystem behavior.
4. Performance tests: Load-test concurrent connections and auth rates to ensure capacity.

Migration Steps (recommended order)

1. Deploy wodSSHServer alongside existing SSH (dual-run) on alternate port or hosts.
2. Sync authorized_keys and group mappings; test users logging into new server.
3. Gradually update clients to point to wodSSHServer (pilot group → wider rollout).
4. Monitor logs and metrics for errors, auth failures, latency, and session behavior.
5. Once stable, decommission legacy SSH or switch port/service. Keep backups and revert plan ready.

Checklist (pre-migration)

• Full backups/snapshots taken
• Inventory of keys, accounts, automation completed
• wodSSHServer compatibility confirmed
• Staging deployment and config validated
• Security policies defined (auth, MFA, ciphers)
• Rollback plan and maintenance window scheduled
• Stakeholders notified

Checklist (during migration)

• Sync keys and configs to new server
• Run authentication and functionality tests for pilot users
• Monitor logs, metrics, and user-reported issues
• Apply fixes/config tweaks as needed

Checklist (post-migration)

• Full audit of access logs and host keys
• Revoke/rotate compromised or temporary keys
• Update documentation and runbooks
• Confirm backups and monitoring are working
• Decommission old SSH service (after retention period)

Quick rollback triggers

• Widespread auth failures
• Unrecoverable performance degradation
• Significant application incompatibility

If you want, I can convert this into a runnable checklist (JSON, CSV, or a printable table) or produce a step-by-step playbook for a specific environment (Linux distro, cloud provider, or scale).