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项羽一开始怎么也不愿意，定要杀了章邯泄愤报仇。When 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.话说北宋仁宗年间，出了一位中国历史上最有名的清官。说起他来，可真是家喻户晓，妇孺皆知。关于他和他的开封府的民间传说数不胜数。他就是贴面无私——包青天。Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.FOX宣布续订新剧《路西法》第二季。Amazon的《#律界巨人# Goliath》获在线媒体续订第三季，预定19年上线。第三季新增演员包括Dennis Quaid﹑Amy Brenneman﹑Beau Bridges﹑Griffin Dunne﹑Sherilyn Fenn及Shamier Anderson；于新季中，Billy McBride（#Billy Bob Thornton#饰）一位旧友突然死亡，这事件将令他面对新的「巨人」 - 中央谷地里一名富豪牧场主及他的妹妹（Dennis Quaid及Amy Brenneman饰演）。