推荐一个实用的开源工具——nmap。项目由nmap开发维护，GitHub上获得了 13532 个Star。简单来说，它是一款Nmap -网络映射器。官方SVN存储库的Github镜像。，对于站长和开发者来说是个不错的工具。
工具功能介绍
Nmap
====Nmap is released under a custom license, which is based on (but not compatible
with) GPLv2. The Nmap license allows free usage by end users, and we also offer
a commercial license for companies that wish to redistribute Nmap technology
with their products. See Nmap Copyright and Licensing
for full details.The latest version of this software as well as binary installers for Windows,
macOS, and Linux (RPM) are available from
Nmap.orgFull documentation is also available
on the Nmap.org website.Questions and suggestions may be sent to
the Nmap-dev mailing list.Installing
Ideally, you should be able to just type:./configure
make
make installFor far more in-depth compilation, installation, and removal notes, read the
Nmap Install Guide on Nmap.org.Using Nmap
Nmap has a lot of features, but getting started is as easy as running `nmap
scanme.nmap.org. Running nmap` without any parameters will give a helpful
list of the most common options, which are discussed in depth in [the man
page](https://nmap.org/book/man.html). Users who prefer a graphical interface
can use the included Zenmap front-end.Contributing
Information about filing bug reports and contributing to the Nmap project can
be found in the HACKING and CONTRIBUTING.md
files.
总的来说，nmap是一个功能比较实用的开源工具，适合日常工作和学习使用。如果你正在寻找一款相关工具，不妨下载试试。使用前建议仔细阅读项目文档。