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When the client SYN packet arrives at the filter gateway, the SYN agent does not forward the SYN packet, but actively replies the SYN/ACK packet to the client in the name of the server. If the client's ACK packet is received, it indicates that this is normal access. At this time, the firewall sends the ACK packet to the server and completes three handshakes. The SYN agent actually replaces the server to deal with SYN attacks. At this time, the filter gateway itself is required to have strong ability to prevent SYN attacks.再说，小孩子不比大人，身子轻，溜刷的很。/chuckle (giggling)Every ship should travel at a safe speed at all times so that appropriate and effective collision avoidance actions can be taken and the ship can be stopped within a distance suitable for the current environment and conditions. In determining the safe speed, the following factors shall be taken into account:Since the outbreak of the debt crisis at HNA, the reporter learned a number of exclusive information about HNA's real estate, aviation and internal structure changes through in-depth interviews, and published several articles that had a great impact on HNA, reflecting the breakthrough ability of the interface in reporting major commercial events.