嵌入式系統強調能在有限的硬體環境下做特定用途的最大應用，而BrazilFW是一個基於自由軟體架構而在Linux平台下的一套強大的軟體路由器，不僅支援L7的防火牆而且又有QoS的管理功能，卻不會耗用大量的硬體資源。因此本論文企圖將其嵌入式系統的軟體路由器BrazilFW實作在這批被視為無法使用的舊電腦上，來做為應用於國小校園中的軟體路由器及防火牆，而達到物盡其用的目的。 其目的不僅希望學校在限資源下─尤其在偏遠型的小學校，其能獲得的經費和資源相當有限，若能讓校園內的舊電腦能物盡其用，相信對這些學校會有一些幫助。更因BrazilFW為其自由軟體的特質，免費下載又開放原始碼，也易於操作，不僅可以替學校省下大筆採購和維修路由器和防火牆硬體的費用，更可以因應學校的環境需求來做調整，加裝需要的應用服務而運用於各種不同規模的校園中，以達到客製化的理想。 Embedded systems stress maximum utilization of limited hardware for specific purposes. BrazilFW is a free and powerful Linux-based software router. It supports L7 firewall and offers QoS management without using a large amount of hardware resources. This study attempted to make use of old and obsolete computers by implementing BrazilFW on them to provide routing and firewall services in elementary school campuses. The purpose of this study was to make use of old computers in elementary schools, especially those located in remote areas and having limited funds and resources. BrazilFW is free software, so it can be downloaded for free and modified without restrictions. Moreover, it is also easy to use. Therefore, BrazilFW can help schools save a huge amount of costs of procuring and maintaining routers and firewall systems and also be modified according to the environmental needs of each school. Customization of this software can be realized through installation and application of optional applications needed by campuses in different scales.
