[gate:~] # cat /etc/ppp/ppp.secret

user1 password1

[gate:~] # cat /etc/ppp/ppp.conf

pptp:
 set ifaddr 192.168.100+X.1 192.168.100+X.10-192.168.100+X.254
 enable mschapv2
 set timeout 0

[gate:~] # pkg_add -r poptop

[gate:~] # cat /usr/local/etc/pptpd.conf

noipparam

[gate:~] # cat /etc/rc.conf

...
pptpd_enable="YES"

[gate:~] # /usr/local/etc/rc.d/pptpd start

[gate:] # cat /etc/ppp/ppp.conf

pptpclient:
 set authname userX
 set authkey passwordX
 set timeout 0
 set ifaddr 0 0
 accept mschapv2
 add default HISADDR
 alias enable yes

[gate:~] # pkg_add -r pptpclient

[gate:~] # rehash

[gate:~] # pptp 172.16.1.254 pptpclient

[gate:~] # ifconfig