常用的端口扫描技术有很多种，如 TCP connect() 扫描 、TCP SYN 扫描、TCP FIN 扫描 等，网络上也有很多文章专门介绍，比如 ：http://www.antai-genecon.com/suml/zhishiyy/jingong/duankougj.htm　上就介绍了很多我的程序 所使用的最基本的扫描技术：TCP 扫描-Port scanning technique commonly used there are many, such as the TCP connect () scanning, TCP SYN scanning, TCP FIN scanning, network, there are many articles devoted to, for example: http://www.antai-genecon.com/suml/zhishiyy/jingong/duankougj.htm on introducing many of my procedures used by the most basic scanning techniques: TCP scanning