命令改进,使nc能顺利发送udp报文: [root@kvm-1 ~]$echo"test"| nc -v -u <ip> <port> Ncat: Version 7.91 ( https://nmap.org/ncat ) Ncat: Connected to <ip>:<port>. Ncat: 3 bytes sent, 0 bytes receivedin0.09 seconds. 以上命令并不能判断对端是否回包,需要另开一个窗口,配合抓包: tcp...