Reverse Proxies

One place for TLS, routing, caching, compression and rate limiting.

3Questions

9Flashcards

5Terms

Drill this topic All of Networking

Questions

3 to work through

intermediate

A page is identical for all users except a small personalised header. How do you cache it?

2 min answer
advanced

A discussion platform puts a caching reverse proxy in front of its application. Anonymous traffic gets much faster; logged-in users see no improvement and occasionally see another user's content. What went wrong?

2 min answer
advanced

Fastly began a software deployment on 12 May 2021 that ran for nearly a month without incident. On 8 June a customer pushed a valid configuration change and 85% of the network started returning errors. What class of risk does that expose, and what does it mean for deployment safety gates?

3 min answer

Terminology

5 terms in this topic

practice

Cache Key Completeness

The requirement that a cache key capture every input varying the response - the property whose violation turns a caching bug into a data leak.

pattern

Origin Shield

An intermediate caching tier between edge caches and the origin that collapses many simultaneous misses into a single origin fetch - which is what ma…

concept

Proxy Buffering

Whether a reverse proxy accumulates a response before forwarding it, which protects the backend from slow clients but breaks streaming.

pattern

Reverse Proxy in Practice

A server that sits in front of origins and terminates, caches, routes and protects — the cheapest place to solve several problems at once.

concept

X-Forwarded-For

The header chain recording original client addresses through a series of proxies — and a value that must never be trusted without knowing the topology.

Networking