OpenVPN connected but cannot online

Hi there,

I had setup a OPENVPN server on my droplet with the following instruction :

https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-14-04

I able to connect it with my openVPN client but unfortunately it unable to get online. my situation :

1. I able to connect to my VPN server through VPN client but wont online.
2. my web site which shared hosted on this VPN server is down.
3. I still can ssh from my terminal to access the server.

your help would be greatly appreciated

System information as of Sat Jun 20 14:35:23 CST 2015

System load: 0.03 Processes: 79 Usage of /: 22.2% of 19.56GB Users logged in: 1 Memory usage: 22% IP address for eth0: 128.199.255.87 Swap usage: 0% IP address for tun0: 10.8.0.1

$ ifconfig eth0 eth0 Link encap:Ethernet HWaddr 04:01:15:09:14:01 inet addr:128.199.255.87 Bcast:128.199.255.255 Mask:255.255.192.0 inet6 addr: fe80::601:15ff:fe09:1401/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1078 errors:0 dropped:0 overruns:0 frame:0 TX packets:892 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:112860 (112.8 KB) TX bytes:164498 (164.4 KB)

$ ifconfig tun0 tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 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:100 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)