It looks like your name servers are down
home:~# cp /etc/resolv.conf /etc/resolv.conf_bak
home:~# echo nameserver 18.104.22.168 > /etc/resolv.conf
home:~# echo nameserver 22.214.171.124 >> /etc/resolv.conf
home:~# ping google.com
ping: unknown host google.com
Try using open DNS servers such as 126.96.36.199 and 188.8.131.52 or contact your ISP to supply you with their nameservers.
And BTW 10.0.0.0/8 is a private netblock. So it only works on your local network, but not on the internet.
Try pinging 184.108.40.206 if you get a reply you're OK to go, if not then your box isn't on the internet