How cookies are handled if you use a proxy between the client and server in HTTP

Question

How cookies are handled if you use a proxy between the client and server in HTTP

Answer 1

There are no special problems with cookies. Request headers Cookieand Set-Cookieare sent directly through the proxy.

If you are concerned about a page that depends on the cookie being cached by the proxy server and served to another user who should not see it, you should indicate this case with the header:

Cache-Control: private

This should be done for any pages protected by a cookie-based login system.

Answer 2

The proxy proxies them, just like proxies everything else.