Linux搭建VPN服务器

5dm

1.准备安装包

[root@localhost Desktop]# ls

dkms-2.0.17.5-1.noarch.rpm ppp-2.4.5-15.0.rhel5.i386.rpm

kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm pptpd-1.3.4-1.rhel5.1.i386.rpm

这是本次试验所用到的pptp相关的软件包

接下来安装

[root@localhost Desktop]# rpm -ivh dkms-2.0.17.5-1.noarch.rpm

warning: dkms-2.0.17.5-1.noarch.rpm: Header V3 DSA signature: NOKEY, key ID 862acc42

Preparing...########################################### [100%]

1:dkms########################################### [100%]

安装dkms成功

[root@localhost Desktop]# rpm -ivh kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm

warning: kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm: Header V3 DSA signature: NOKEY, key ID 862acc42

error: Failed dependencies:

gcc is needed by kernel_ppp_mppe-1.0.2-3dkms.noarch

安装kernel_ppp_mppe提示有依赖gcc软件包，所以要先解决依赖问题

[root@localhost CentOS]# rpm -ivh gcc-4.1.2-48.el5.i386.rpm glibc-devel-2.5-49.i386.rpm libgomp-4.4.0-6.el5.i386.rpm glibc-headers-2.5-49.i386.rpm kernel-headers-2.6.18-194.el5.i386.rpm

warning: gcc-4.1.2-48.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID e8562897

Preparing... ########################################### [100%]

1:libgomp########################################### [ 20%]

2:kernel-headers########################################### [ 40%]

3:glibc-headers########################################### [ 60%]

4:glibc-devel########################################### [ 80%]

5:gcc########################################### [100%]

[root@localhost CentOS]#

安装gcc需要5个软件包，安装完毕，接下来再次安装kernel_ppp_mppe

[root@localhost Desktop]# rpm -ivh kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm

warning: kernel_ppp_mppe-1.0.2-3dkms.noarch.rpm: Header V3 DSA signature: NOKEY, key ID 862acc42

Preparing...########################################### [100%]

1:kernel_ppp_mppe########################################### [100%]

Creating symlink /var/lib/dkms/kernel_ppp_mppe/1.0.2/source ->

/usr/src/kernel_ppp_mppe-1.0.2

DKMS: add Completed.

Module build for the currently running kernel was skipped

since the kernel source for this kernel does not seem to be

installed.

[root@localhost Desktop]#

安装完毕

接下来安装ppp和pptpd服务包

[root@localhost Desktop]# rpm -ivh ppp-2.4.5-15.0.rhel5.i386.rpm

warning: ppp-2.4.5-15.0.rhel5.i386.rpm: Header V3 DSA signature: NOKEY, key ID b56a8bac

Preparing...########################################### [100%]

file /usr/sbin/chat from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/sbin/pppd from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/sbin/pppdump from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/sbin/pppoe-discovery from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/sbin/pppstats from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/share/man/man8/chat.8.gz from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

file /usr/share/man/man8/pppd.8.gz from install of ppp-2.4.5-15.0.rhel5.i386 conflicts with file from package ppp-2.4.4-2.el5.i386

[root@localhost Desktop]# rpm -ivh pptpd-1.3.4-1.rhel5.1.i386.rpm

warning: pptpd-1.3.4-1.rhel5.1.i386.rpm: Header V3 DSA signature: NOKEY, key ID 862acc42

Preparing...########################################### [100%]

1:pptpd########################################### [100%]

[root@localhost Desktop]#

安装成功。到此，所需要的软件包已经安装完毕

2.下面开始修改配置文件

[root@localhost Desktop]# vi /etc/pptpd.conf

将

#localip 192.168.0.1

#remoteip 192.168.0.234-238,192.168.0.245

# or

#localip 192.168.0.234-238,192.168.0.245

#remoteip 192.168.1.234-238,192.168.1.245

修改为

localip 172.16.4.6

remoteip 192.168.0.234-238,192.168.0.245

# or

#localip 192.168.0.234-238,192.168.0.245

#remoteip 192.168.1.234-238,192.168.1.245

Localip 后面要改为你服务的ip

Remoteip后面改为你分配给vpn用户的ip段

使用命令开启服务

[root@localhost Desktop]# service pptpd start

Starting pptpd: [确定]

[root@localhost Desktop]#

关闭命令：service pptpd stop

这时你编辑vpn用户的密码资料等都是实时生效的。

给服务器添加用户

[root@localhost Desktop]# vim /etc/ppp/chap-secrets

在最下面插入新行

写法：

用户名服务名密码ip

例如：

wuli pptpd testpasswd 192.168.0.234

此时用户就可以登录vpn服务器了，分配的ip地址只有192.168.0.234这一个，也就是说只能一个人同时使用。

如果想多人同时使用，，可以将192.168.0.234改为*

这样就不限制这个帐户的使用人数了（同时登录的人数还取决于pptpd服务器的设置，默认40个）

现在vpn可以连接了

连接之后如果需要用户上网，还需要设置NAT，ip转发

在linux服务器上使用iptables，如下：

iptables -t nat -F

iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -j SNAT --to 172.16.4.6

上面的192.168.0.0替换成你要分配给用户的vpn内网ip段，

172.16.4.6替换为你的vpn服务器ip（与pptpd.conf的localip一样）

3.测试

找一台xp来作为客户端，添加一个连接

he88777

不过5.5以后，可以不用安装dkms和ppp了，建议要先查询PPP软件包支不支持.

he88777

好帖子。顶~~~~~~