pptp及l2tp安装教程篇一安装pptp方法
<p><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>该篇文章是安装pptp，下一篇将写安装l2tp。这实际是是根据记忆写的，可能在步骤或配置上会有遗漏，争取下次用虚拟机自己动手安装来试试，如有错误，请指教。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>1、首先要安装pptp的源，以Centos 6为例： </span></p>
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<span><u>复制代码</u></span></p>
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代码如下:</p>
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yum update <br>
yum install ppp iptables <br>
rpm -Uvh http://poptop.sourceforge.net/yum/stable/rhel6/pptp-release-current.noarch.rpm <br>
yum install pptpd </p>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>这时会显示：Package pptpd-1.3.4-2.el6.x86_64 already installed and latest version </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>2、/etc/pptpd.conf的内容是这样的，参照这里修改文件即可，千万不要覆盖了，因为原文件就是一个教你怎么配置的教程啊，看网上的一些教程上来就是rm 然后touch，再写入教程上提供的配置，这样完全没有必要，还少了一个学习的地方。 </span></p>
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<span><u>复制代码</u></span></p>
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代码如下:</p>
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option /etc/ppp/options.pptpd <br>
localip 192.168.10.2 <br>
remoteip 192.168.10.234-238,192.168.10.245 </p>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>3、/etc/ppp/options.pptpd的配置 </span></p>
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<span><u>复制代码</u></span></p>
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代码如下:</p>
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name pptpd <br>
refuse-pap <br>
refuse-chap <br>
refuse-mschap <br>
require-mschap-v2 <br>
require-mppe-128 <br>
ms-dns 8.8.8.8 <br>
ms-dns 8.8.4.4 <br>
proxyarp <br>
novj <br>
novjccomp <br>
nologfd </p>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>我记得不错的话，这个配置文件里，只需要想改两个dns服务器即可，这里用的是Google的DNS服务器。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>4、离成功快了，现在给pptpd加一个帐号吧，vim打开/etc/ppp/chap-secrets，加上 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>test pptpd test12345 * </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>意思是，用户名为test，用的是pptpd服务，密码是test12345，不限定IP地址为* </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>5、用户名、密码都有了，现在是不是可以连接了？答案是肯定的，如果在确认你的防火墙打开了pptp端口的情况下，这时就可以连接pptp服务器了，连接之前记得重启一下service pptpd restart来让配置生效。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>但是这时虽然可以连接，却不能上网，这是因为我们还没有设置转发，现在只能上内网（用来上公司内部网的，到这里应该就可以了吧？） </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>但是，因为众所周知的原因，我们搭建这个东东，并不是用来上内网的，所以，下面让我们继续设置吧。 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>6、编辑/etc/sysconfig/iptables，网上看的iptables 的相关文档，都不推荐这样子来设定iptables </span></p>
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<span><u>复制代码</u></span></p>
<p>
代码如下:</p>
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*nat <br>
:P REROUTING ACCEPT <br>
:INPUT ACCEPT <br>
:OUTPUT ACCEPT <br>
:P OSTROUTING ACCEPT <br>
-A POSTROUTING -s 192.168.10.0/24 -o eth0 -j MASQUERADE <br>
COMMIT <br>
;在filter段里加入下面的 <br>
-A INPUT -p tcp --dport 1723 -j ACCEPT <br>
-A INPUT -p tcp --dport 47 -j ACCEPT <br>
-A INPUT -p gre -j ACCEPT </p>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>7、不直接编辑的情况下 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>iptables -A POSTROUTING -s 192.168.10.0/24 -o eth0 -j MASQUERADE </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>8、注意开启IP地址的转发功能 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>echo 1 > /proc/sys/net/ipv4/ip_forward </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>要点： </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>1、iptables防火墙的设置 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>2、IP的转发 </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>参考： </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>1、http://www.diahosting.com/dload/pptpd.sh </span><br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>2、http://phorum.study-area.org/index.php?topic=16243.0</span></p>
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