debianutils 2.15-r1 is the latest stable version but the upstream project no longer has that version available on any of their mirror sites.
This downloads just fine from gentoo mirrors, don't see what's your issue... # emerge -f =sys-apps/debianutils-2.15-r1 Calculating dependencies... done! >>> Emerging (1 of 1) sys-apps/debianutils-2.15-r1 to / >>> Downloading 'ftp://ftp.sh.cvut.cz/MIRRORS/gentoo/gentoo/distfiles/debianutils_2.15.tar.gz' --02:28:23-- ftp://ftp.sh.cvut.cz/MIRRORS/gentoo/gentoo/distfiles/debianutils_2.15.tar.gz => `/usr/portage/distfiles/debianutils_2.15.tar.gz' Resolving ftp.sh.cvut.cz... 147.32.127.222 Connecting to ftp.sh.cvut.cz|147.32.127.222|:21... connected. Logging in as anonymous ... Logged in! ==> SYST ... done. ==> PWD ... done. ==> TYPE I ... done. ==> CWD /MIRRORS/gentoo/gentoo/distfiles ... done. ==> PASV ... done. ==> RETR debianutils_2.15.tar.gz ... done. Length: 186,036 (182K) (unauthoritative) 100%[===================================================================================================>] 186,036 329.71K/s
you need to have GENTOO_MIRRORS set