為了解決防火墻對IPv6 協(xié)議的兼容及對內部網(wǎng)絡之間安全的保障問題，本文設計實
現(xiàn)了基于Intel Xscale IXP425 處理器的嵌入式IPv6 防火墻。該防火墻可以通過WEB 遠程加以管理，對IPv6 網(wǎng)絡包和IPv4 網(wǎng)絡包均可以進行良好的過濾。防火墻能夠判斷出網(wǎng)絡包的協(xié)議類型，分別加以處理，實行動態(tài)包過濾，并可以解決IPv6 分片攻擊問題。防火墻硬件系統(tǒng)基于IXP425 處理器，該處理器具有良好的網(wǎng)絡特性，擁有分布式處理架構，并行方式執(zhí)行其指令流。處理器的高速性保證了嵌入式IPv6 防火墻處理網(wǎng)絡數(shù)據(jù)包的高效性。防火墻軟件系統(tǒng)基于Linux 的Netfilter 框架，該框架對網(wǎng)絡包的處理體系十分成熟，從而保證了嵌入式IPv6 防火墻運行時的穩(wěn)定性和準確性。
關鍵字：IPv6,防火墻，IXP425，網(wǎng)絡
Abstract: In order to solve the problem of the firewall's compatibility to IPv6 protocol and the
security among the internal nets, the paper designs and implements the embedded IPv6 firewall based on Intel XScale IXP425 network processor .This firewall can be managed by visting WEB page from remote machine and can filter both Ipv6 packet and IPv4 packet. It can identify the protocol of the net packet and process it in respective ways with the main method of Dynamic Packet Filtering.The firewall also solves the problem of IPv6 fragmentation. The hardware system of the firewall is based on IXP425 network processor with good network characteristic, whose distributed processing framework and parallel implementation of its order flows ensure the embedded IPv6 firewall processes the data packet with high speed. The software system of the firewall is based on the Netfilter framework of the Linux with a sophisticated system to process the network packet .The framework support the embedded IPv6 firewall run with high stability and veracity .
Key word:IPV6,Firewall, IXP425，Network