These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=dev/dertobi123.git;a=summary.
If you have some problems, go to the official site first.
icinga : Icinga - Check daemon, CGIs, docs, IDOutils ( http://www.icinga.org/ )
nagios-plugins : Nagios $PV plugins - Pack of plugins to make Nagios work properly ( http://www.nagios.org/ )
pnp4nagios : A performance data analyzer for nagios ( http://www.pnp4nagios.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a dertobi123
For Paludis use this rsync : rsync://gentoo.zugaina.org/dertobi123-portage
If you have a problem : ycarus(-at-)zugaina.org