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What is a middleware chain in Traefik and why order it carefully?
A middleware chain is the ordered list of middlewares a router applies to a request before it reaches the service, and Traefik executes them strictly in the order they're listed.
Because each middleware can modify, reject, or pass along the request, the order changes behavior: putting BasicAuth before RateLimit means unauthenticated requests get rejected before consuming a rate-limit slot, while the reverse order would let unauthenticated traffic exhaust the limit first.
Chains are often defined once and reused across multiple routers, which keeps common patterns like "auth then rate-limit then headers" consistent across an entire deployment.
Middlewares in a chain execute:
Placing BasicAuth before RateLimit in a chain means:
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