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Grandma Lily picked up the three socks already prepared on the table and hung them by the fireplace in turn.胡宗宪也终于在这里找到了一些归宿，无论如何，为中华镇守国门这件事总能让他好受一些，(未完待续。上海滩美女老大阿暿决定封刀归隐，而江湖各门派为争夺天下第一武者的招牌，趁阿暿回乡祝寿时屠她师门，师父惨死。为替师父报仇，阿暿携小师妹重返上海滩横扫黑帮大杀四方，不料却遭诬陷杀师灭祖，深陷洋人圈套、帮派争斗的姐妹二人也心生嫌隙反目成仇。各方势力都对阿暿虎视眈眈，她又该如何为师报仇惩恶扬善？小葱含笑不语，快速扫一眼少年，跟他爹一样高大结实，微黑的脸颊，唇边生了一圈细细的绒毛，笑容朴实淳厚。Http://www.jiemian.com/article/2054952.htmlWhen a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.