/lib/upgrade/keep.d/ppp
/usr/sbin/pppd
/etc/ppp/filter
/lib/netifd/ppp-up
/etc/ppp/options
/etc/ppp/chap-secrets
/lib/netifd/ppp-down
/lib/netifd/proto/ppp.sh
/etc/ppp/resolv.conf
/lib/netifd/ppp6-up
