用raw socket 发送TCP报文有助于理解网络协议-used raw socket TCP packet sent to understand network protocol

TCP/UDP端口扫描器，打印服务名称、RPC服务、网卡地址 -TCP/UDP port scanner, print service name, rpc server, network card addre

UDP扫描原理与TCP扫描原理不同，UDP扫描是通过向对方UDP端口发送数据，然后根据对方ICMP返回数据进行判断。接收ICMP数据包只能采用RAW Socket接收到所有的数据包，然后从中过滤出哪一个数据包是对方返回的，进而判断出对方端口是否处于开状态。-UDP scanning principle and TCP scanning works differently, UDP port scans are sent via UDP to the other data, and then re

A simple multi-threaded TCP Port Checker utility. Accepts a .csv or a set of args containing a list of IP s and TCP ports and attempts to open a new socket in each simple run java -jar PortChecker-1.0.jar ports.csv