Ros资源网平常在Windows下使用VPN，各位都会发现，所有出网的数据包都通过VPN了。虽然这样可以访问某些被“禁止访问”的网站，但访问国内的网站，速度却慢了。
事实上，连接VPN后，Windows会自动把系统的默认网关改为VPN的，因此数据包都通过了VPN服务器。既然如此，我们再对路由表进行操作，添加一些对国内IP生效的路由规则，那样就能实现访问国外网站时通过VPN，访问国内网站时直连。
Windows下对路由表进行操作的命令是route，route的用法如下：
route ADD 目标IP MASK 子网掩码 网关 METRIC 跃点数 IF 网络接口
route CHANGE 目标IP MASK 子网掩码 网关 METRIC 跃点数 IF 网络接口
route DELETE 目标IP
上面分别是添加路由，更改路由，以及删除路由的用法。
首先连接VPN，让Windows自动更改路由。
接下来使用route对国内IP的路由表进行更改，下面提供一个国内IP的IP段列表：
14.0.0.0/8 27.0.0.0/8 36.0.0.0/8 39.0.0.0/8 42.0.0.0/7 49.0.0.0/8 58.0.0.0/7 60.0.0.0/8 101.0.0.0/8 103.0.0.0/8 106.0.0.0/8 112.0.0.0/4 134.128.0.0/9 139.0.0.0/9 139.128.0.0/9 140.0.0.0/9 140.128.0.0/9 144.0.0.0/9 144.128.0.0/9 150.0.0.0/8 153.0.0.0/8 157.0.0.0/9 157.128.0.0/9 159.128.0.0/9 161.128.0.0/9 162.0.0.0/9 163.0.0.0/8 166.0.0.0/9 167.128.0.0/9 168.128.0.0/9 171.0.0.0/8 172.0.0.0/12 175.0.0.0/8 180.0.0.0/8 182.0.0.0/7 192.112.0.0/12 192.128.0.0/9 202.0.0.0/7 218.0.0.0/7 220.0.0.0/6
Windows的打开cmd，执行以下的命令(不要保存为BAT再运行)：
set GATEWAY=你的路由器网关地址 route add 14.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 27.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 36.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 39.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 42.0.0.0 MASK 254.0.0.0 %GATEWAY% METRIC 1 route add 49.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 58.0.0.0 MASK 254.0.0.0 %GATEWAY% METRIC 1 route add 60.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 101.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 103.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 106.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 112.0.0.0 MASK 240.0.0.0 %GATEWAY% METRIC 1 route add 134.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 139.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 139.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 140.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 140.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 144.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 144.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 150.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 153.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 157.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 157.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 159.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 161.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 162.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 163.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 166.0.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 167.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 168.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 171.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 172.0.0.0 MASK 255.240.0.0 %GATEWAY% METRIC 1 route add 175.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 180.0.0.0 MASK 255.0.0.0 %GATEWAY% METRIC 1 route add 182.0.0.0 MASK 254.0.0.0 %GATEWAY% METRIC 1 route add 192.112.0.0 MASK 255.240.0.0 %GATEWAY% METRIC 1 route add 192.128.0.0 MASK 255.128.0.0 %GATEWAY% METRIC 1 route add 202.0.0.0 MASK 254.0.0.0 %GATEWAY% METRIC 1 route add 218.0.0.0 MASK 254.0.0.0 %GATEWAY% METRIC 1 route add 220.0.0.0 MASK 252.0.0.0 %GATEWAY% METRIC 1
Linux使用pptpclient连接VPN后并无自动更改路由，所以需要自己添加一条规则，可以ip这个命令(ppp设备名称可以通过ifconfig查看)，执行以下命令即可：
PPPDEV=连接了VPN的ppp设备名称 OUTPUTDEV=访问公网用的网卡名称 ip route add 0.0.0.0/0 dev ${PPPDEV} ip route add 0.0.0.0/7 dev ${OUTPUTDEV} ip route add 10.0.0.0/8 dev ${OUTPUTDEV} ip route add 14.0.0.0/8 dev ${OUTPUTDEV} ip route add 27.0.0.0/8 dev ${OUTPUTDEV} ip route add 36.0.0.0/8 dev ${OUTPUTDEV} ip route add 39.0.0.0/8 dev ${OUTPUTDEV} ip route add 42.0.0.0/7 dev ${OUTPUTDEV} ip route add 49.0.0.0/8 dev ${OUTPUTDEV} ip route add 58.0.0.0/7 dev ${OUTPUTDEV} ip route add 60.0.0.0/8 dev ${OUTPUTDEV} ip route add 101.0.0.0/8 dev ${OUTPUTDEV} ip route add 103.0.0.0/8 dev ${OUTPUTDEV} ip route add 106.0.0.0/8 dev ${OUTPUTDEV} ip route add 110.0.0.0/7 dev ${OUTPUTDEV} ip route add 112.0.0.0/4 dev ${OUTPUTDEV} ip route add 127.0.0.0/8 dev ${OUTPUTDEV} ip route add 134.128.0.0/9 dev ${OUTPUTDEV} ip route add 139.0.0.0/9 dev ${OUTPUTDEV} ip route add 139.128.0.0/9 dev ${OUTPUTDEV} ip route add 140.0.0.0/9 dev ${OUTPUTDEV} ip route add 140.128.0.0/9 dev ${OUTPUTDEV} ip route add 144.0.0.0/9 dev ${OUTPUTDEV} ip route add 144.128.0.0/9 dev ${OUTPUTDEV} ip route add 150.0.0.0/8 dev ${OUTPUTDEV} ip route add 153.0.0.0/8 dev ${OUTPUTDEV} ip route add 157.0.0.0/9 dev ${OUTPUTDEV} ip route add 157.128.0.0/9 dev ${OUTPUTDEV} ip route add 159.128.0.0/9 dev ${OUTPUTDEV} ip route add 161.128.0.0/9 dev ${OUTPUTDEV} ip route add 162.0.0.0/9 dev ${OUTPUTDEV} ip route add 163.0.0.0/8 dev ${OUTPUTDEV} ip route add 166.0.0.0/9 dev ${OUTPUTDEV} ip route add 167.128.0.0/9 dev ${OUTPUTDEV} ip route add 168.128.0.0/9 dev ${OUTPUTDEV} ip route add 171.0.0.0/8 dev ${OUTPUTDEV} ip route add 172.0.0.0/12 dev ${OUTPUTDEV} ip route add 175.0.0.0/8 dev ${OUTPUTDEV} ip route add 180.0.0.0/8 dev ${OUTPUTDEV} ip route add 182.0.0.0/7 dev ${OUTPUTDEV} ip route add 192.112.0.0/12 dev ${OUTPUTDEV} ip route add 192.128.0.0/9 dev ${OUTPUTDEV} ip route add 202.0.0.0/7 dev ${OUTPUTDEV} ip route add 210.0.0.0/7 dev ${OUTPUTDEV} ip route add 218.0.0.0/7 dev ${OUTPUTDEV} ip route add 220.0.0.0/6 dev ${OUTPUTDEV}
执行完上面的命令后，即可实现访问国内的网站直连，访问国外网站走VPN。
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