I am not a lawyer, but as long as your local laws do not prohibit you from pinging a given IPv4 address, then I can't imagine any issues. Being technically lega

I am not a lawyer, but as long as your local laws do not prohibit you from pinging a given IPv4 address, then I can't imagine any issues. Being technically legal doens't mean you won't step on some toes though. Everyone who runs full internet scans has reported getting lots of exclusion requests, (baseless) legal threats, and even retaliatory DDoS attacks coming back at their source IPs. Massscan ships with an exclude list which you would do well to utilize: https://github.com/robertdavidgraham/masscan/blob/master/data/exclude.conf https://github.com/robertdavidgraham/masscan/blob/master/dat... If you try to run an internet wide massscan without this list, it will stop you and give you a warning about how to use the list. You then either manually override the warning, or use the list.