原文链接：http://grid.tsinghua.edu.cn/home/liulk/publish/computer/ServerVPN.html

提纲

整个安装和配置过程主要包括如下的命令： 

[root@gw3121 ~]# apt-get install  pptpd      #安装pptpd
[root@gw3121 ~]# apt-get install pptp-linux  #安装pptpd client，这一步可以没有
[root@gw3121 ~]# vi /etc/pptpd.conf          #编辑pptpd的配置文件
[root@gw3121 ~]# vi /etc/ppp/pptpd-options            #编辑底层ppp服务器配置文件
[root@gw3121 ~]# vi /etc/ppp/chap-secrets             #用户名和密码文件
[root@gw3121 ~]# /etc/init.d/pptpd restart   #重启pptpd服务器


#打开防火墙和nat，如果你没有使用防火墙和nat，这一步可以不做
[root@gw3121 ~]# iptables -t nat -A POSTROUTING -s 10.0.11.0/24  -o eth0 -j SNAT --to 166.111.202.141
[root@gw3121 ~]# iptables -A  FORWARD -s 10.0.11.0/24 -j ACCEPT
[root@gw3121 ~]# iptables -A  FORWARD -d 10.0.11.0/24 -j ACCEPT 


配置文件编辑结果


    

  • /etc/pptpd.conf 
    • 



###############################################################################
# $Id: pptpd.conf 4255 2004-10-03 18:44:00Z rene $
#
# Sample Poptop configuration file /etc/pptpd.conf
#
# Changes are effective when pptpd is restarted.
###############################################################################


# TAG: ppp
#       Path to the pppd program, default '/usr/sbin/pppd' on Linux
#
#ppp /usr/sbin/pppd


# TAG: option
#       Specifies the location of the PPP options file.
#       By default PPP looks in '/etc/ppp/options'
#
option /etc/ppp/pptpd-options


# TAG: debug
#       Turns on (more) debugging to syslog
#
#debug


# TAG: stimeout
#       Specifies timeout (in seconds) on starting ctrl connection
#
# stimeout 10


# TAG: noipparam
#       Suppress the passing of the client's IP address to PPP, which is
#       done by default otherwise.
#
#noipparam


# TAG: logwtmp
#       Use wtmp(5) to record client connections and disconnections.
#
logwtmp


# TAG: bcrelay <if>
#       Turns on broadcast relay to clients from interface <if>
#
#bcrelay eth1


# TAG: localip
# TAG: remoteip
#       Specifies the local and remote IP address ranges.
#
#       Any addresses work as long as the local machine takes care of the
#       routing.  But if you want to use MS-Windows networking, you should
#       use IP addresses out of the LAN address space and use the proxyarp
#       option in the pppd options file, or run bcrelay.
#
#       You can specify single IP addresses seperated by commas or you can
#       specify ranges, or both. For example:
#
#               192.168.0.234,192.168.0.245-249,192.168.0.254
#
#       IMPORTANT RESTRICTIONS:
#
#       1. No spaces are permitted between commas or within addresses.
#
#       2. If you give more IP addresses than MAX_CONNECTIONS, it will
#          start at the beginning of the list and go until it gets
#          MAX_CONNECTIONS IPs. Others will be ignored.
#
#       3. No shortcuts in ranges! ie. 234-8 does not mean 234 to 238,
#          you must type 234-238 if you mean this.
#
#       4. If you give a single localIP, that's ok - all local IPs will
#          be set to the given one. You MUST still give at least one remote
#          IP for each simultaneous client.
#
# (Recommended)
localip 10.0.11.254
remoteip 10.0.11.1-253
# or
#localip 192.168.0.234-238,192.168.0.245
#remoteip 192.168.1.234-238,192.168.1.245


    

  • pptpd-options 
    • 



###############################################################################
# $Id: pptpd-options 4255 2004-10-03 18:44:00Z rene $
#
# Sample Poptop PPP options file /etc/ppp/pptpd-options
# Options used by PPP when a connection arrives from a client.
# This file is pointed to by /etc/pptpd.conf option keyword.
# Changes are effective on the next connection.  See "man pppd".
#
# You are expected to change this file to suit your system.  As
# packaged, it requires PPP 2.4.2 and the kernel MPPE module.
###############################################################################


# Authentication


# (must match the second field in /etc/ppp/chap-secrets entries)
name gw3121


# Optional: domain name to use for authentication
# domain mydomain.net


# Strip the domain prefix from the username before authentication.
# (applies if you use pppd with chapms-strip-domain patch)
#chapms-strip-domain


# Encryption
# Debian: on systems with a kernel built with the package
# kernel-patch-mppe >= 2.4.2 and using ppp >= 2.4.2, ...
# {{{
#refuse-pap
#refuse-chap
#refuse-mschap
require-chap
require-mschap
# Require the peer to authenticate itself using MS-CHAPv2 [Microsoft
# Challenge Handshake Authentication Protocol, Version 2] authentication.
require-mschap-v2
# Require MPPE 128-bit encryption
# (note that MPPE requires the use of MSCHAP-V2 during authentication)
#require-mppe-128
# }}}


# Network and Routing


# If pppd is acting as a server for Microsoft Windows clients, this
# option allows pppd to supply one or two DNS (Domain Name Server)
# addresses to the clients.  The first instance of this option
# specifies the primary DNS address; the second instance (if given)
# specifies the secondary DNS address.
ms-dns 166.111.8.28
ms-dns 166.111.8.29


# If pppd is acting as a server for Microsoft Windows or "Samba"
# clients, this option allows pppd to supply one or two WINS (Windows
# Internet Name Services) server addresses to the clients.  The first
# instance of this option specifies the primary WINS address; the
# second instance (if given) specifies the secondary WINS address.
#ms-wins 10.0.0.3
#ms-wins 10.0.0.4


# Add an entry to this system's ARP [Address Resolution Protocol]
# table with the IP address of the peer and the Ethernet address of this
# system.  This will have the effect of making the peer appear to other
# systems to be on the local ethernet.
# (you do not need this if your PPTP server is responsible for routing
# packets to the clients -- James Cameron)
proxyarp


# Debian: do not replace the default route
nodefaultroute


# Logging


# Enable connection debugging facilities.
# (see your syslog configuration for where pppd sends to)
debug


# Print out all the option values which have been set.
# (often requested by mailing list to verify options)
#dump


# Miscellaneous


# Create a UUCP-style lock file for the pseudo-tty to ensure exclusive
# access.
lock


# Disable BSD-Compress compression
nobsdcomp


    

  • chap-secrets 
    • 



# Secrets for authentication using CHAP
# client        server  secret                  IP addresses
lkliu           gw3121  "passwd1"              10.0.11.1
vpn             gw3121  "passwd2"          *


客户端


    

  • windows 
    • 





   建立连接  




  control pannel -> Network Connections -> create a new  connect ->
  next -> connect to the network at my working place -> next ->
  virtual private network connection -> campany name (input: 3-121) ->
  Host name or IP address (input: 166.111.202.141) -> finish




   设置连接  




  duble click the connection created just now -> properties -> security ->
  advanced(custom setting) ->optional encryption( connect even no encryption) ->
  allow this protocal -> CHAP (only choose this) -> OK -> Yes