Netcat
参考：
If I am not mistaken, nc comes as a default tool in most of the Linux distros. You can download the windows port of the tool at http://www.securityfocus.com/tools/139
The command to have netcat listen on a specific port is “nc -l PORT_NUMBER”. If you run this on a Windows 7 machine, you will get this dreaded message “local listenfuxored: INVAL”. The fix is to run it with a -L option. So the command would like this
nc -L -p 80
The -L means “listen harder, re-listen on socket close” :).. Have to dig deeper and see what it really means though. I will leave that for another blog post.
And if you want to validate that netcat is indeed listening on that port, you can connect to that port from another workstation by using nmap.
