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The above has already given detailed examples and described how to manage IPTables rules. In order to review quickly in the future, we will summarize the above commands.The attacker first forged the address to initiate a SYN request to the server (can I establish a connection?) The server will respond with an ACK + SYN (Yes + Please confirm). The real IP will think that I did not send the request and did not respond. The server does not receive a response and will retry 3-5 times and drop the connection after waiting for a SYN Time (typically 30 seconds-2 minutes).纽约唐人街实地取景的火爆动作片，虽然剧本和演员表演演出都显得普通，但对喜欢阳刚警匪电影的观众而言，连场实感甚强的枪战和打斗场面应该会满足。香港督察林国正为人疾恶如仇，铲除黑帮活动无数，其妻蔡洁多年来一直担忧丈夫出生入死的职业，在多番警告之下，林亦顾及妻子和幼女阿敏的安定，毅然答应妻子移民加拿大，林不愿移民但想挽回家庭，唯有请大假到纽约，希望说服妻子放弃移民打算，不料在阴差阳错之下，林巧遇仇家“王子”，林在保护洁之余，与王子展开火拼……有消息称夜郎那边有军队异动的痕迹。(Draft for Comments)不一定非要读书，去看、去听、去做、去想也是学习。2. Dynamically add functions to an object and can also dynamically undo them. (Inheritance cannot do this. The function of inheritance is static and cannot be added or deleted dynamically.)