After configuring VPN in ubuntu, configure the route to the VPN

Run the route command to view all the routes.

Route

The result is roughly as follows:

Kernel IP route table destination gateway subnet mask mark hop reference using interface default 192.168.8.1 0.0.0.0 UG 0 0 255.192.168.8.1 255.255.255.255 UGH 0 0 0 wlan0110.185.76.107 192.168.8.1 255.255.255.255 UGH 0 0 wlan0link-local * 255.255.255.0.0 U 1000 0 0 0 wlan0192.168.0.40 * 255.255.255.255 UH 0 0 0 ppp0192.168.8.0 * 255.255.255.0 U 2 0 0 wlan0

Configure all traffic to go through the vpn

Ip route replace default dev ppp0

This article from "not afraid of wrong, afraid not to break" blog, please be sure to keep this source http://jacksongblack.blog.51cto.com/6378693/1302855