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Here, the filter gateway mainly indicates the firewall, and of course the router can also become the filter gateway. Firewall is deployed between different networks to prevent foreign illegal attacks and the leakage of confidential information. It is located between the client and the server. Using it to protect SYN attacks can play a very good role. Filter gateway protection mainly includes timeout setting, SYN gateway and SYN agent.In the 1980s, he personally caught an overseas spy. When he learned that another spy was still at large, he led a group of border guards to follow the direction of the spy's flight up the mountain. When the car could not drive, they walked. When the road was no longer available, they climbed the mountain. At last they came to a forbidden area frequented by wolves.上世纪20年代的香港，人称鬼王少帅的西泽奉命捉拿叛徒，却因为五块钱和大学生陆小葵不打不相识。两人就此结下奇妙缘分。西泽向来玩世不恭桀骜不驯，父亲特意找来军官大学的优秀生想将其“驯服”，没想到找来的竟然就是陆小葵，陆小葵品学兼优，尤其擅长国学礼仪。她坚信“知识改变命运”，一直憧憬着将年幼的弟弟送入学堂上学。两人在课堂上斗智斗勇，针锋相对，俨然一对欢喜冤家。就在陆小葵对西泽产生好感之际，西泽却告诉陆小葵，他是她绝对不能爱上的人，重重疑雾笼罩着陆小葵，一对有情人将何去何从。　　被提拔到镇里当干部的长贵渐渐瞧不起大脚，在镇上结识了一个美丽的理发师，并对她暗生情愫。不过长贵最后却被单位开除，重新回到村里，面临着对人生的重新思考……15恢复高考的第二年，知青周文和周武兄弟俩经过一年刻苦学习双双中榜。在这高兴的时刻，却因家遭横祸，兄弟俩只能有一个去上学。周文在关键时刻选择了逃跑，并说出周武不是母亲亲生的这一事实，伤心的周武也离开了家。周武曾订下一门亲事，女方叫李英姿，李英姿为人敢说敢做，二人经历不少磨难终于在一起，并事事为周家着想。周家回城后，当了干部的周文私欲也开始膨胀，与周武的关系也一度紧张，最后周文走上一条不归路。周文被捕后，周武和李英姿去监狱看他，周文格外感动，哥俩提起往事，周文懊悔不迭。十二届三中全会召开了，李英姿和周武决定回农村大干一番事业，二人手牵手的踏入了崭新而充满希望的乡村生活。