While playing with nmap, I have started to wonder: are there any ip addresses which were specifically made to learn how to use nmap.
(As far as I understood I can not just scan any ip address, because this is illegal)
On SE I have seen posts with the examples of sites for sql-injections, so I hope that there is something out there to learn how to use nmap. Currently I am scanning my own machine 127.0.0.1 and my own web server, which is not so much fun.