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Let's take a look at these four chu animals杨超越首支单曲《跟着我一起》mv，小奶音爆炸，表演天赋真的可以啊MyDoSth+=Print;　　卡萨诺瓦声乐教授永善和弟子仁静开着白色奔驰车兜风驶向郊外。但是因为违反交规与交警文在发生了冲突，这倒霉的事情似乎在暗示着什么。算了，还是回去看小说吧，小说不会骗人。TCB (TCP? Transport Control Block is a transport protocol data structure that contains all the information of the connection (in fact, in many operating systems, it is a queue used to process inbound connection requests. The queue holds TCP connection items that are in a half-open state and items that have established a full connection but have not yet been extracted by the application through an accept () call). The amount of memory occupied by a single TCB depends on the implementation of TCP options and other functions used in the connection. Usually a TCB has at least 280 bytes, which in some operating systems has exceeded 1300 bytes. The SYN-RECEIVED state of TCP is used to indicate that the connection is only half open, and the legality of the request is still questioned. An important aspect worth noting here is that the size of TCB allocation space depends on the SYN packets received-before the connection is fully established or the return reachability of the connection initiator is verified.The verification code changes when recording, so if you want to use BurpSuite for replay attacks, you need to find a login website that does not need the verification code. 2.2. 2 During the experiment, first of all, according to the above analysis of replay attacks, I chose Touniu Net for the experiment. You can see that its login page does not need to enter a verification code. Then log in, And open BurpSuite to observe the intercepted login information, Forward the unwanted response in the past, Find the important information part, and the intercepted content is shown in the following figure: the circled part is my login name and encrypted password. Record the information to carry out replay attack. When accessing the login page again, only the request needs to be released again to achieve the login effect, without inputting the user name and password. The way to replay the attack is as follows, Choose Block Login Info. Right-click SendtoRepeater for a replay attack, Then enter the Repeater tab to observe, You can see that the content of the attack that you will replay appears in the request interface. Stand-alone go makes replay attacks, The return information of the page appears in the response interface, It represents the success of login authentication, as shown in the following figure: Let's modify the login information just recorded and replay it again to see how the results will be different. Here, I have deleted several digits from the user name, so the login will fail. Through the Compare tab, we can compare the page response after two logins.