经典扫描器~！免费的~！开源的~！
其基本功能有三个,一是嗅探一组主机是不是在线;其次是扫描主机端口,嗅探所提供的网络服务;还可以推断主机所用的操作系统。Nmap可用于扫描仅有两个节/点的LAN,直至500个节/点以上的网络。Nmap还答使用户定制扫描技巧。通常,一个简单的使用ICMP协议的ping操作可以满足通常需要;也可以深入嗅探UDP或许TCP端口,直至主机所使用的操作系统;还可以将一切嗅探成果记录到各种格式的日志中,供进一步分析操作。nmap-5.21-win32\nmap-5.21-win32.zip
(It has three basic functions, one is to sniff whether a group of hosts is online; the other is to scan the host ports and sniff the network services provided; it can also infer the operating system used by the host. Nmap can be used to scan LANs with only two nodes/points, up to networks with more than 500 nodes/points. Nmap also enables users to customize scanning techniques. Usually, a simple ping operation using the ICMP protocol can meet the usual needs; you can also sniff UDP or TCP ports deeply, down to the operating system used by the host; you can also record all sniffing results in various formats of logs, for further analysis.
nmap-5.21-win32\nmap-5.21-win32.zip)
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