Proxy Web Servers and Authentication > How Proxies Work > Cache control

Cache control response directives

public

The server specifies that the response is cacheable in any cache (client or proxy cache).

private

The response is intended for the specific client only and cannot be cached by any shared caches.

no-cache

The response is uncacheable and must not be stored in either client or proxy caches.

no-store

The response cannot be stored on any non-volatile media. This usually means that the entity can only be stored in memory and never to disk, where it is susceptible to compromise.

no-transform

Intermediate proxy servers must not perform any transformations on the entity.

max-age=seconds

The origin server specifies a freshness lifetime for the entity, overriding lifetime values determined by the proxy caches.