오픈 소스 VPN 프로그램, ZeroTier One

https://drive.google.com/file/d/0B-WCQz0DLRojNXVPMWZpNnF2RUk/view?usp=sharing

Try ZeroTier Now

Step 1: Download ZeroTier One

ZeroTier One is our open source endpoint service for Windows, Macintosh, Linux, BSD, Android, and (very soon) iOS. It lets you join ZeroTier virtual networks like VPNs but with the ease of IRC or Slack channels. The download page also contains basic instructions to get you started.

Step 2: Join a Virtual Network

After installing and starting the service, join network 8056c2e21c000001. This is an open public network that we use for demonstration and testing. Once you get an IP address, visit http://earth.zerotier.net/ and you should see a welcome page.

Step 3: Connect Another Device

Go to another computer, phone, tablet, or cloud server and join the same network. Note the IP addresses of both devices. Now try pinging, ssh'ing, or otherwise connecting between them.

Step 4: Leave the Network

If you don't want to stick around on Earth, just leave. That's it! The network's virtual port will disappear and your computer is no longer connected. Read on to learn more, including how to create networks of your own.