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2.1 PCB Dimension RequirementsThe firewall sets the SYN forwarding timeout parameter (the firewall for state detection can be set in the state table), which is much less than the timeout time of the server. When the client sends the SYN packet and the server sends the acknowledgement packet (SYN + ACK), if the firewall has not received the acknowledgement packet (ACK) from the client by the time the counter expires, it sends the RST packet to the server to cause the server to delete the half connection from the queue. It is worth noting that the setting of gateway timeout parameters should not be too small or too large. If the setting of timeout parameters is too small, it will affect normal communication. If the setting is too large, it will also affect the effect of preventing SYN attacks. This parameter must be set according to the network application environment.2) Docker DaemonThe recovery mode will display itunes and cable icons on the screen.Some historical events have been neglected for a long time in China, and Aban's books have played a role in sinking. For example, the visit of Lin Bai, the father of the world's global flight, to China is historic and dramatic, but most of us do not know much about it. This book has detailed records.简介：1942年，一群毫无经验的平民百姓，自愿参军受训，成为美军最新的一个团——空降部队。中尉索博魔鬼般的训练使他们吃尽了苦头，然而他们也成为了美军最精锐的部队。终于在1944年6月5日登上了飞机，奔赴法国“诺曼底”。