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如何將 OpenVPN 連接埠轉送至 NAT'd XEN domU

tag-icon • tag-icon iptables xen openvpn nat
如何將 OpenVPN 連接埠轉送至 NAT'd XEN domU

我想在 XEN 上安裝 OpenVPN domU。 Dom0 和 domU 正在運行 Debian Squeeze，所有 domU 都在 NAT 專用網路 10.0.0.1/24 上，我的 VPN-Gate 是 von 10.0.0.1 並且正在運行。如何才能在dom0公網IP下存取呢？

我嘗試使用 iptables 轉發端口，但沒有成功。

這是我所做的：

~ # iptables -L -n -v
Chain INPUT (policy ACCEPT 1397 packets, 118K bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy ACCEPT 930 packets, 133K bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif5.0 
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-in vif5.0 udp spt:68 dpt:67 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif5.0 
    0     0 ACCEPT     all  --  *      *       10.0.0.1             0.0.0.0/0           PHYSDEV match --physdev-in vif5.0 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif3.0 
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-in vif3.0 udp spt:68 dpt:67 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif3.0 
    0     0 ACCEPT     all  --  *      *       10.0.0.5             0.0.0.0/0           PHYSDEV match --physdev-in vif3.0 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif2.0 
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-in vif2.0 udp spt:68 dpt:67 
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED PHYSDEV match --physdev-out vif2.0 
    0     0 ACCEPT     all  --  *      *       10.0.0.2             0.0.0.0/0           PHYSDEV match --physdev-in vif2.0 
  147  8236 ACCEPT     tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:80 
   13   546 ACCEPT     udp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           udp dpt:1194 

Chain OUTPUT (policy ACCEPT 1000 packets, 99240 bytes)
 pkts bytes target     prot opt in     out     source               destination  


~ # iptables -L -t nat -n -v

Chain PREROUTING (policy ACCEPT 324 packets, 23925 bytes)
 pkts bytes target     prot opt in     out     source               destination         
  139  7824 DNAT       tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           tcp dpt:80 to:10.0.0.5:80 
    1    42 DNAT       udp  --  *      *       0.0.0.0/0            0.0.0.0/0           udp dpt:1194 to:10.0.0.1:1194 

Chain POSTROUTING (policy ACCEPT 92 packets, 5030 bytes)
 pkts bytes target     prot opt in     out     source               destination         
  863 64983 MASQUERADE  all  --  *      eth0    0.0.0.0/0            0.0.0.0/0           
    0     0 MASQUERADE  all  --  *      eth0    0.0.0.0/0            0.0.0.0/0           
    0     0 MASQUERADE  all  --  *      eth0    0.0.0.0/0            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT 180 packets, 13953 bytes)
 pkts bytes target     prot opt in     out     source               destination

答案1

我設法讓它工作。錯誤不在於包轉發，而在於IP路由。我需要確保 VPN 用戶端知道在哪裡可以找到 10.0.0.0/24 網路。這可以透過使用 OpenVPN 來完成push-route。

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