通过情况下大家配置VPN时，都会直接把默认网关指向服务端。但是这会影响访问公司内网资源，造成一些不便。如果只是希望走VPN访问部分外网资源，可以不让VPN客户端改默认的网关，通过加一些路由表使得到特定地址走VPN。
比如我在公司的时候只是需要访问一下google，可以在VPN服务端新增配置,其中把push redirect-gateway def1 bypass-dhcp给直接注释掉，新push了很多路由表到客户端。另外，在客户端也需要把redirect-gateway给注释掉。这样启动后可以看到只是注入特定的路由表，没有改默认路由。
附上服务端配置：
[bash]
port 600xxx
proto udp
dev tun
ca key/ca.crt
cert key/server.crt
key key/server.key # This file should be kept secret
dh key/dh1024.pem
server 10.99.1.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "dhcp-option DNS 208.67.220.220"
push "dhcp-option DNS 208.67.222.222"
#push redirect-gateway def1 bypass-dhcp
keepalive 10 30
comp-lzo
max-clients 60
user nobody
group nogroup
persist-key
persist-tun
status openvpn-google.log
verb 3
mute 20
duplicate-cn
## add google route rule
push "route 207.223.160.0 255.255.240.0 "
push "route 66.249.85.0 255.255.255.0 "
push "route 66.249.83.0 255.255.255.0 "
push "route 74.125.130.0 255.255.255.0 "
push "route 192.178.0.0 255.254.0.0 "
push "route 64.233.160.0 255.255.255.0 "
push "route 74.125.17.0 255.255.255.0 "
push "route 66.249.72.0 255.255.255.0 "
push "route 173.194.112.0 255.255.255.0 "
push "route 173.194.98.0 255.255.255.0 "
push "route 173.194.140.0 255.255.255.0 "
push "route 74.125.196.0 255.255.255.0 "
push "route 173.194.78.0 255.255.255.0 "
push "route 209.85.238.0 255.255.255.0 "
push "route 72.14.208.0 255.255.254.0 "
push "route 64.233.164.0 255.255.255.0 "
push "route 8.15.202.0 255.255.255.0 "
push "route 74.125.142.0 255.255.255.0 "
push "route 108.177.0.0 255.255.128.0 "
push "route 74.125.203.0 255.255.255.0 "
push "route 74.125.58.0 255.255.255.0 "
push "route 173.194.141.0 255.255.255.0 "
push "route 72.14.244.0 255.255.254.0 "
push "route 173.194.73.0 255.255.255.0 "
push "route 72.14.225.0 255.255.255.0 "
push "route 74.125.193.0 255.255.255.0 "
push "route 74.125.239.0 255.255.255.0 "
push "route 173.255.112.0 255.255.240.0 "
push "route 173.194.119.0 255.255.255.0 "
push "route 66.249.64.0 255.255.224.0 "
push "route 66.249.70.0 255.255.255.0 "
push "route 74.125.190.0 255.255.255.0 "
push "route 74.125.70.0 255.255.255.0 "
push "route 74.125.206.0 255.255.255.0 "
push "route 74.125.198.0 255.255.255.0 "
push "route 173.194.75.0 255.255.255.0 "
push "route 8.34.208.0 255.255.248.0 "
push "route 74.125.19.0 255.255.255.0 "
push "route 74.125.131.0 255.255.255.0 "
push "route 66.102.4.0 255.255.255.0 "
push "route 173.194.76.0 255.255.255.0 "
push "route 8.34.216.0 255.255.248.0 "
push "route 66.249.79.0 255.255.255.0 "
push "route 66.249.90.0 255.255.255.0 "
push "route 162.216.148.0 255.255.252.0 "
push "route 173.194.32.0 255.255.255.0 "
push "route 173.194.142.0 255.255.255.0 "
push "route 74.125.238.0 255.255.255.0 "
push "route 74.125.18.0 255.255.255.0 "
push "route 74.125.234.0 255.255.255.0 "
push "route 173.194.79.0 255.255.255.0 "
push "route 173.194.40.0 255.255.255.0 "
push "route 66.249.64.0 255.255.255.0 "
push "route 74.125.68.0 255.255.255.0 "
push "route 74.125.43.0 255.255.255.0 "
push "route 192.158.28.0 255.255.252.0 "
push "route 8.35.192.0 255.255.248.0 "
push "route 74.125.0.0 255.255.0.0 "
push "route 209.85.128.0 255.255.128.0 "
push "route 66.249.67.0 255.255.255.0 "
push "route 66.249.84.0 255.255.255.0 "
push "route 1.2.3.0 255.255.255.0 "
push "route 74.125.232.0 255.255.255.0 "
push "route 173.194.96.0 255.255.255.0 "
push "route 74.125.118.0 255.255.255.0 "
push "route 74.125.28.0 255.255.255.0 "
push "route 173.194.121.0 255.255.255.0 "
push "route 70.32.144.0 255.255.255.0 "
push "route 74.125.186.0 255.255.255.0 "
push "route 74.125.31.0 255.255.255.0 "
push "route 64.233.166.0 255.255.255.0 "
push "route 74.125.207.0 255.255.255.0 "
push "route 8.8.8.0 255.255.255.0 "
push "route 173.194.65.0 255.255.255.0 "
push "route 74.125.138.0 255.255.255.0 "
push "route 173.194.34.0 255.255.255.0 "
push "route 74.125.192.0 255.255.255.0 "
push "route 66.249.91.0 255.255.255.0 "
push "route 74.125.229.0 255.255.255.0 "
push "route 74.125.88.0 255.255.254.0 "
push "route 74.125.37.0 255.255.255.0 "
push "route 74.125.40.0 255.255.255.0 "
push "route 74.125.176.0 255.255.255.0 "
push "route 64.233.171.0 255.255.255.0 "
push "route 173.194.70.0 255.255.255.0 "
push "route 193.142.125.0 255.255.255.0 "
push "route 74.125.187.0 255.255.255.0 "
push "route 74.125.29.0 255.255.255.0 "
push "route 74.125.16.0 255.255.255.0 "
push "route 66.249.65.0 255.255.255.0 "
push "route 173.194.66.0 255.255.255.0 "
push "route 74.125.202.0 255.255.255.0 "
push "route 173.194.68.0 255.255.255.0 "
push "route 173.194.120.0 255.255.255.0 "
push "route 173.194.113.0 255.255.255.0 "
push "route 216.239.38.0 255.255.255.0 "
push "route 146.148.0.0 255.255.128.0 "
push "route 64.233.160.0 255.255.224.0 "
push "route 66.102.2.0 255.255.255.0 "
push "route 66.249.88.0 255.255.255.0 "
push "route 72.14.192.0 255.255.192.0 "
push "route 66.249.78.0 255.255.255.0 "
push "route 173.194.45.0 255.255.255.0 "
push "route 74.125.183.0 255.255.255.0 "
push "route 74.125.230.0 255.255.255.0 "
push "route 74.125.129.0 255.255.255.0 "
push "route 70.32.148.0 255.255.254.0 "
push "route 172.253.0.0 255.255.0.0 "
push "route 74.125.116.0 255.255.255.0 "
push "route 173.194.97.0 255.255.255.0 "
push "route 64.233.186.0 255.255.255.0 "
push "route 23.236.48.0 255.255.240.0 "
push "route 74.125.76.0 255.255.255.0 "
push "route 74.125.26.0 255.255.255.0 "
push "route 74.125.36.0 255.255.255.0 "
push "route 74.125.63.0 255.255.255.0 "
push "route 66.249.80.0 255.255.255.0 "
push "route 142.250.0.0 255.254.0.0 "
push "route 173.194.124.0 255.255.255.0 "
push "route 64.233.172.0 255.255.255.0 "
push "route 173.194.43.0 255.255.255.0 "
push "route 23.251.128.0 255.255.224.0 "
push "route 74.125.235.0 255.255.255.0 "
push "route 162.222.176.0 255.255.248.0 "
push "route 74.125.137.0 255.255.255.0 "
push "route 173.194.72.0 255.255.255.0 "
push "route 173.194.136.0 255.255.255.0 "
push "route 74.125.188.0 255.255.255.0 "
push "route 74.125.185.0 255.255.255.0 "
push "route 173.194.42.0 255.255.255.0 "
push "route 74.125.226.0 255.255.255.0 "
push "route 74.125.227.0 255.255.255.0 "
push "route 216.239.35.0 255.255.255.0 "
push "route 1.0.0.0 255.255.255.0 "
push "route 173.194.46.0 255.255.255.0 "
push "route 74.125.205.0 255.255.255.0 "
push "route 216.239.34.0 255.255.255.0 "
push "route 74.125.117.0 255.255.255.0 "
push "route 173.194.44.0 255.255.255.0 "
push "route 74.125.182.0 255.255.255.0 "
push "route 74.125.178.0 255.255.255.0 "
push "route 74.125.30.0 255.255.255.0 "
push "route 216.239.39.0 255.255.255.0 "
push "route 74.125.231.0 255.255.255.0 "
push "route 66.249.92.0 255.255.255.0 "
push "route 66.102.0.0 255.255.240.0 "
push "route 216.239.44.0 255.255.254.0 "
push "route 74.125.74.0 255.255.255.0 "
push "route 173.194.33.0 255.255.255.0 "
push "route 216.58.192.0 255.255.224.0 "
push "route 173.194.117.0 255.255.255.0 "
push "route 74.125.191.0 255.255.255.0 "
push "route 74.125.22.0 255.255.255.0 "
push "route 173.194.35.0 255.255.255.0 "
push "route 74.125.201.0 255.255.255.0 "
push "route 216.239.32.0 255.255.224.0 "
push "route 74.125.121.0 255.255.255.0 "
push "route 66.249.89.0 255.255.255.0 "
push "route 108.59.80.0 255.255.240.0 "
push "route 74.125.224.0 255.255.255.0 "
push "route 172.217.0.0 255.255.0.0 "
push "route 74.125.119.0 255.255.255.0 "
push "route 113.197.106.0 255.255.255.0 "
push "route 64.233.173.0 255.255.255.0 "
push "route 66.102.3.0 255.255.255.0 "
push "route 74.125.177.0 255.255.255.0 "
push "route 74.125.41.0 255.255.255.0 "
push "route 74.125.189.0 255.255.255.0 "
push "route 74.125.24.0 255.255.255.0 "
push "route 74.125.236.0 255.255.255.0 "
push "route 74.125.143.0 255.255.255.0 "
push "route 8.35.200.0 255.255.248.0 "
push "route 173.194.67.0 255.255.255.0 "
push "route 72.14.228.0 255.255.255.0 "
push "route 173.194.36.0 255.255.255.0 "
push "route 74.125.184.0 255.255.255.0 "
push "route 64.233.168.0 255.255.255.0 "
push "route 173.194.41.0 255.255.255.0 "
push "route 74.125.90.0 255.255.254.0 "
push "route 173.194.118.0 255.255.255.0 "
push "route 173.194.37.0 255.255.255.0 "
push "route 107.178.192.0 255.255.192.0 "
push "route 173.194.0.0 255.255.0.0 "
push "route 74.125.180.0 255.255.255.0 "
push "route 74.125.200.0 255.255.255.0 "
push "route 74.125.233.0 255.255.255.0 "
push "route 74.125.122.0 255.255.255.0 "
push "route 70.32.128.0 255.255.224.0 "
push "route 130.211.0.0 255.255.0.0 "
push "route 74.125.237.0 255.255.255.0 "
push "route 74.125.42.0 255.255.255.0 "
push "route 173.194.64.0 255.255.255.0 "
push "route 74.125.20.0 255.255.255.0 "
push "route 173.194.127.0 255.255.255.0 "
push "route 74.125.128.0 255.255.255.0 "
push "route 173.194.39.0 255.255.255.0 "
push "route 74.125.194.0 255.255.255.0 "
push "route 66.249.77.0 255.255.255.0 "
push "route 173.194.69.0 255.255.255.0 "
push "route 74.125.136.0 255.255.255.0 "
push "route 74.125.54.0 255.255.254.0 "
push "route 173.194.99.0 255.255.255.0 "
push "route 66.249.74.0 255.255.255.0 "
push "route 66.249.93.0 255.255.255.0 "
push "route 66.249.69.0 255.255.255.0 "
push "route 74.125.25.0 255.255.255.0 "
push "route 74.125.228.0 255.255.255.0 "
push "route 64.233.165.0 255.255.255.0 "
push "route 216.239.36.0 255.255.255.0 "
push "route 173.194.91.0 255.255.255.0 "
push "route 74.125.21.0 255.255.255.0 "
push "route 74.125.73.0 255.255.255.0 "
push "route 216.239.32.0 255.255.255.0 "
push "route 108.170.192.0 255.255.192.0 "
push "route 199.223.232.0 255.255.248.0 "
push "route 74.125.225.0 255.255.255.0 "
push "route 199.192.112.0 255.255.252.0 "
push "route 173.194.77.0 255.255.255.0 "
push "route 66.249.73.0 255.255.255.0 "
push "route 66.249.81.0 255.255.255.0 "
push "route 64.233.167.0 255.255.255.0 "
push "route 8.8.4.0 255.255.255.0 "
push "route 74.125.72.0 255.255.255.0 "
push "route 74.125.135.0 255.255.255.0 "
push "route 74.125.45.0 255.255.255.0 "
push "route 216.239.33.0 255.255.255.0 "
push "route 107.167.160.0 255.255.224.0 "
push "route 173.194.38.0 255.255.255.0 "
push "route 1.1.1.0 255.255.255.0 "
push "route 74.125.195.0 255.255.255.0 "
push "route 74.125.204.0 255.255.255.0 "
push "route 173.194.126.0 255.255.255.0 "
push "route 74.125.23.0 255.255.255.0 "
push "route 66.249.66.0 255.255.255.0 "
push "route 66.249.76.0 255.255.255.0 "
push "route 173.194.71.0 255.255.255.0 "
push "route 74.125.181.0 255.255.255.0 "
# add opendns route rule
push "route 208.67.0.0 255.255.0.0 "
[/bash]
客户端配置：
[bash]
client
dev tun
proto udp
remote xx.xx.xx.xx 60xxx
resolv-retry infinite
nobind
persist-key
persist-tun
ca openvzca.crt
cert openvz.crt
key openvz.key
ns-cert-type server
comp-lzo
verb 3
mute 20
keepalive 20 60
;redirect-gateway
max-routes 10000
[/bash]