aha, vypadá to, že ani na gentoo to už nejméně od 7.1 nejde:
# Make sure people who are using tcp wrappers are notified of its removal. #531156
if grep -qs '^ *sshd *:' "${EROOT}"/etc/hosts.{allow,deny} ; then
ewarn "Sorry, but openssh no longer supports tcp-wrappers, and it seems like"
ewarn "you're trying to use it. Update your ${EROOT}etc/hosts.{allow,deny} please."
fi
tady je test pro jiné distribuce:
http://denyhosts.sourceforge.net/ssh_config.html