host invalid 中文意思是什麼
host invalid
解釋
無效主機-
The firewall and proxy, parts of the software of the system, based on the ip chians, is a packet filtering firewall. first, it provides transparent - proxy to the user on the user ' s lan via ip forwarding and ip masquerading in which all the hosts share on ip address to access the internet. and then the firewall provides protection to the host behind it via ip filtering preventing invalid access such as ip spoofing. after that, the firewall can let the hosts behind it to provide internet services to the outside hosts via ip port forwarding, for example www and smtp
左巴八碩士學住論文v銳示》 a引工r 」 snie引s該解決方案的軟體部分? ?網關的防火墻和代理功能，由linux提供的ipchans建立的包過慮防火墻實現，它首先通過ip轉發和ip偽裝實現透明代理，讓用戶內部網的所有主機共享一個ip地址對internet進行訪問，同時，通過阻止ip欺騙等非法訪問，為用戶的內部網提供一定的安全保障。 -
It is composed of two aspects : first, it uses the java sandbox to control the access of host resource, thus it can prevent the host resource from being accessed by agents without authority ; second, it adopts a authentication based mobile agent transfer protocol to control the transfer of agents in order to refuse the transfer request of invalid agent. thus, it can guarantee that the agent running in the host is valid, in other words, it avoids performing the illegal agent in the host. further more, it can be sure that the agent status data have n ' t been tampered or replaced in the course of transfer
該方案主要包括兩個方面內容：一、利用java2沙箱控制主機資源的存取，防止主機資源被移動代理非授權訪問；二、採用一種基於證書的移動代理遷移協議，對移動代理的遷移過程進行控制，拒絕不合法移動代理遷移至主機的請求，確保主機上運行的移動代理具有合法身份，並且確保移動代理遷移狀態數據在遷移過程中不被篡改或替換。
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