jordan-chevalley

In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).That morning, they agreed to gather in the square at the gate of the Bureau of Letters and Visits, but before the gathering was completed, someone appeared and asked to check their certificates and mobile phone information. Once they were confirmed to be defenders, they were taken to the bus.　　女儿的睡前故事知名女同剧情剧集《拉字至上》续集定名：《拉字至上：Q世代》(L Word: Generation Q)，并宣布今年秋季档开播，仍在Showtime。Sui是个平凡的女孩，她大多时间都用来嫉妒其他的女孩。有一天，她接受了一件好事，她能够变成她嫉妒的任何人。她的梦想就要成真了，她能得到一个不错的工作和她一直想得到的男人。但是她会无意中失去一些东西。一个一直在身后支持她的人。这个她认为需要的东西，是美貌吗？而事实上，充满嫉妒的生活又是怎样的？大家还是各逞手段，想要有所突破。Accessible at any time