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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.Step 7: The program executes gadget 2. The bl register stores data "0x01" and [esi+edi*4-0xD] points to a value of "0xff". The instruction "add [esi+edi*4-0xD], bl" causes the value in the bl register to be added to the value of the data pointed to by [esi+edi*4-0xD], by which an attacker can construct the value "0x00" for the last byte of val. The "jmp eax" directive causes the program to continue jumping to gadget 1.朝对面扬声喊道：谁是这寨子的头？让他出来，在下有话要问他。《火星情报局第二季》是首档用综艺手法检验全民新奇发现的网络涵综（汪涵首档网综）。将于2016年11月4日在优酷独家首播如何反天？亦是不知。书房内，泥鳅痛心而又无措地自问：他要怎么办呢？黄鳝和锦鲤敲门进来劝解哥哥。