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hardDesignScenarioSeniorStaffLead

The tooling you would use to fix a network outage runs over the network that is down. How do you break that circularity before it costs you a day?

6 min readUpdated 2026-08-15Target archetype: Big Tech, Enterprise Captive, Product Startup

Answer

Short answer

Separate the layers that can fail together: routing reachability, name resolution, identity and physical access. Then build an access path that shares none of them, keep controls failing static rather than closed, and rehearse the emergency path often enough that it is known to work.

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Likely follow-ups

  • Your bastion is reached by name and name resolution is gone. What do you still have if nothing was prepared in advance?
  • Your identity provider is a hosted service and its login page cannot be reached. How should break-glass authentication work instead?
  • Should a server withdraw its route when its own health check fails? Argue both sides and say when you would choose which.
  • The door controllers and badge readers depend on the corporate network. Whose problem is that, and what do you do about it?

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