伪装 IP 以使互联网在 VPN 上运行

伪装 IP 以使互联网在 VPN 上运行

我在 debian-squeeze 服务器上成功设置了 pptp VPN 服务器,我可以从 Windows 7 连接到它,但 ping 任何外部主机(如 google.com)失败。ping 10.0.0.1 或 10.0.0.10 可以正常工作。

到目前为止我已经尝试了很多方法,但没有任何效果。我做错了吗?

我设立pptpd了;

ms-dns 8.8.8.8
ms-dns 8.8.4.4

localip 10.0.0.1
remoteip 10.0.0.10-100

添加了 iptable 规则;

iptables -A INPUT -p gre -j ACCEPT
iptables -A INPUT -p tcp --dport 1723 -j ACCEPT
iptables -A INPUT -i ppp+ -j ACCEPT
iptables -A FORWARD -i ppp+ -j ACCEPT
iptables -A FORWARD -o ppp+ -j ACCEPT

net.ipv4.ip_forward=1启用/etc/sysctl.conf

并加上伪装;

iptables -t nat -A POSTROUTING -s 10.0.0.0/16 -o ppp0 -j MASQUERADE

有人能发现错误吗?

消息日志:

Jun 20 15:25:01 server1 pppd[6089]: pppd 2.4.5 started by root, uid 0
Jun 20 15:25:01 server1 pppd[6089]: Using interface ppp0
Jun 20 15:25:01 server1 pppd[6089]: Connect: ppp0 <--> /dev/pts/2
Jun 20 15:25:05 server1 pppd[6089]: local  IP address 10.0.0.1
Jun 20 15:25:05 server1 pppd[6089]: remote IP address 10.0.0.10

调试日志:

Jun 20 15:24:47 server1 pptpd[6053]: CTRL: Reaping child PPP[6054]

pptpd 日志:

Jun 20 15:25:01 server1 pptpd[6088]: CTRL: Client 8X.XX.2XX.X4 control connection started
Jun 20 15:25:01 server1 pptpd[6088]: CTRL: Starting call (launching pppd, opening GRE)
Jun 20 15:25:04 server1 pptpd[6088]: CTRL: Ignored a SET LINK INFO packet with real ACCMs!

Linux服务器上的ifconfig:

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.0.0.1  P-t-P:10.0.0.10  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1400  Metric:1
          RX packets:156 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:16390 (16.0 KiB)  TX bytes:137 (137.0 B)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:127.0.0.2  P-t-P:127.0.0.2  Bcast:0.0.0.0  Mask:255.255.255.255
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:29264 errors:0 dropped:0 overruns:0 frame:0
          TX packets:30152 errors:0 dropped:88 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:4129198 (3.9 MiB)  TX bytes:25084183 (23.9 MiB)

venet0:0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:1X9.XX.1XX.XX9  P-t-P:1X9.XX.1XX.XX9  Bcast:0.0.0.0  Mask:255.255.255.255
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1

Windows 客户端上的 ipconfig:

PPP adapter Chicago:

   Connection-specific DNS Suffix  . : 
   IPv4 Address. . . . . . . . . . . : 10.0.0.10
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . : 0.0.0.0

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . : 
   Link-local IPv6 Address . . . . . : fe80::dc99:4aef:5221:b5e3%11
   IPv4 Address. . . . . . . . . . . : 192.168.1.102
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.1.1

Tunnel adapter isatap.{290FC5BA-1A1F-48E5-9FAA-621E96CF4AED}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . : 
   IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:79fd:2c53:3789:f5ff:fff5
   Link-local IPv6 Address . . . . . : fe80::2c53:3789:f5ff:fff5%13
   Default Gateway . . . . . . . . . : ::

Tunnel adapter isatap.{A22A1F34-B6D4-4BD7-BCA4-FAECB71D2D14}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

tracert -d www.google.com在客户端:

Tracing route to www.l.google.com [74.125.132.105]
over a maximum of 30 hops:

  1   117 ms   121 ms   117 ms  10.0.0.1 
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.

答案1

您没有推动默认网关

PPP 适配器芝加哥:

连接特定的 DNS 后缀 . : IPv4 地址 . . . . . . . . . . . . : 10.0.0.10 子网掩码 . . . . . . . . . . . . : 255.255.255.255 默认网关 . . . . . . . . . : 0.0.0.0

您需要使其指向 10.0.0.1 而不是 0.0.0.0

如果仍然不起作用,请尝试

iptables -t 过滤器 -F

要验证是否是防火墙阻止了流量,请记住规则的顺序很重要


编辑:

我看到你的 NAT 行如下:

iptables -t nat -A POSTROUTING -s 10.0.0.0/16 -o ppp0 -j MASQUERADE

错了,ppp0 是 VPN 接口,你需要在 WAN 接口上进行 NAT。我从来没用过那个伪装东西……我总是这样进行 NAT:

iptables -t nat -A POSTROUTING -j SNAT -s 10.0.0.0/16 --to-source 1X9.XX.1XX.XX9

我猜 1X9.XX.1XX.XX9 是您的公共 IP 地址,否则用该地址替换它。

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