HN # lsmod | grep ppp

ppp_deflate             9793  2
zlib_deflate           21977  1 ppp_deflate
ppp_async              15169  1
crc_ccitt               6337  1 ppp_async
ppp_generic            30165  6 ppp_deflate,ppp_async
slhc                   10561  1 ppp_generic

HN # vzctl set [VEID]--devices c:108:0:rw --save
HN # vzctl set [VEID] --features ppp:on --save
HN # vzctl exec [VEID] mknod /dev/ppp c 108 0
HN # vzctl exec [VEID] chmod 600 /dev/ppp

VPS:

apt-get install ppp pptpd

vim /etc/pptpd.conf
    localip 192.168.0.1
    remoteip 192.168.0.234-238,192.168.0.245

    mknod /dev/ppp c 108 0

# net.ipv4.ip_forward = 1
# iptables -A POSTROUTING -t nat -s 10.10.10.0/24 -j SNAT --to-source MYVPSIP
# /etc/init.d/iptables save

User Login:

vi /etc/ppp/chap-secrets

# client        server  secret                  IP addresses
myusername      pptpd   ????????                *