ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/rp-pppoe-3.11-7.el7.x86_64.rpm
ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/libpcap-1.5.3-9.el7.x86_64.rpm
ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/ppp-2.4.5-33.el7.x86_64.rpm
rpm -ivh libpcap-1.5.3-9.el7.x86_64.rpm ppp-2.4.5-33.el7.x86_64.rpm rp-pppoe-3.11-7.el7.x86_64.rpm
./ppp_auto.sh rtxy software enp1s0