[root@cloud ~]# pptpsetup --create vpn1 --server 192.168.1.2 --username vpn --password vpn --encrypt --start
Using interface ppp0
Connect: ppp0 <--> /dev/pts/1
EAP: unknown authentication type 26; Naking
EAP: peer reports authentication failure
Connection terminated.
vi /etc/ppp/options （不是 options.pptp,被网上到处转的某个文章误导很久）
refuse-pap
refuse-eap
refuse-chap
refuse-mschap
require-mppe
