external application proxies

[str]

подскажите, что это в компьютерной тематике:
built-in application proxies
external application proxies
robust policy engine

КОНТЕКСТ:
Appliance supports every possible mode of implementation using appliances including:
passive monitoring, built-in application proxies and message transfer agents (MTA), in-line transparent bridges or integration with external application proxies, MTA, Digital Rights Management (DRM) and encryption gateways. A robust policy engine provides selective and
granular monitoring, enforcement, or encryption options, allowing you to seamlessly migrate from auditing to prevention.

Спасибо!

[alk]

внутренние (внешние) прокси сервера приложений
плюс
http://www.multitran.ru/c/m/shortf=1&fshort=1&q=application+proxies

robust policy engine - устойчивый к сбоям "движок", сервер применения политики безопасности