This diagram shows a client with a client-side OWSM policy sending a message to a front-end proxy that contains an OWSM service policy. The front-end proxy processes all security headers, and when it forwards the message to two different local proxies (local proxy 3 and local proxy 4), the message contains no security headers. Because local proxy 3 contains a service policy, an exception is thrown because the policy expects security headers. Local proxy 4 contains an OWSM non-security policy, so the message passes through successfully.