fping : Utility to ping multiple hosts at once ( https://fping.org/ https://github.com/schweikert/fping/ )
masscan : Mass IP port scanner ( https://github.com/robertdavidgraham/masscan )
smokeping : A powerful latency measurement tool ( https://oss.oetiker.ch/smokeping/ )
zeek : The Zeek Network Security Monitor ( https://www.zeek.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a oubliette
For Paludis use this rsync : rsync://gentoo.zugaina.org/oubliette-portage
If you have a problem : ycarus(-at-)zugaina.org