tcp四次挥手是超经典的网络知识，但是网络中的异常状况千奇百怪，说不定会“偷袭”到标准流程的盲区。最近笔者遇到了一个罕见的挥手乱序问题，经过对内核代码的分析和试验，最后终于找到了原因，角度可谓刁钻。 本文从技术视角，将排查过程记录下来 ...

注意：本文只探讨技术，请勿用于非法用途，否则后果自负。 TCP协议是 TCP/IP 协议栈中一个重要的协议，平时我们使用的浏览器，APP等大多使用 TCP 协议通讯的，可见 TCP 协议在网络中扮演的角色是多么的重要。 TCP 协议是一个可靠的、面向连接的流协议，由于 TCP ...

TCP的经典异常问题无非就是丢包和连接中断，在这里我打算与各位聊一聊TCP的RST到底是什么？现网中的RST问题有哪些模样？我们如何去应对、解决？本文将从RST原理、排查手段、现网痛难点案例三个板块自上而下带给读者一套完整的分析。 一、背景 最近一年的 ...

那这里面提到的"面向连接"，意味着需要 建立连接，使用连接，释放连接。 建立连接是指我们熟知的TCP三次握手。 而使用连接，则是通过一发送、一确认的形式，进行数据传输。 还有就是释放连接，也就是我们常见的TCP四次挥手。 TCP四次挥手大家应该比较了解 ...

Radware has found itself in 2019 defending against what it calls a "steady" rise in TCP DDoS reflection attacks. Since low-bandwidth TCP reflection attacks were thought in the past not to be able to ...

Cybercriminals appear to have finally figured out a way to launch highly effective distributed denial-of-service (DDoS) attacks using TCP amplification — something most attackers have typically ...

The specific type of TCP attack used in the recent spate of DDoS efforts were TCP SYN-ACK reflection attacks. The last 30 days has seen a renewed increase in distributed denial-of-service (DDoS) ...

The procedure that takes place between two TCP/IP nodes to establish a connection. Known as the "SYN, SYN-ACK, ACK handshake," computer A transmits a SYNchronize packet to computer B, which sends back ...

Take advantage of TCP/IP options to optimize data transmission Your email has been sent By Alex Kuznetsov, Alex Plant, and Alexander Tormasov Last time, we explained how the TCP_CORK option can ...