1. Renjie Weng rweng@stevens.edurweng@stevens.educs615 presentation 4/22/2013

2.  extends a private network across public networks like the Internetprivate networkInternet

3.  extends a private network across public networks like the Internetprivate networkInternet  OpenVPN & EC2

4.  extends a private network across public networks like the Internetprivate networkInternet  OpenVPN & EC2  2 private network behind NAT

5.  extends a private network across public networks like the Internetprivate networkInternet  OpenVPN & EC2  2 private network behind NAT  Routing

6.  extends a private network across public networks like the Internetprivate networkInternet  OpenVPN & EC2  2 private network behind NAT  Routing  Bridging

7. Bridged mode -- Layer 2 -- Data Link  Works well with application-layer protocols that depend on LAN broadcast resolution  Can tunnel non-IP protocols

8. Routing / NAT -- Layer 3 – Network  More efficient and scalable  Greater control over IP and routing configuration  Doesn't work well with application-layer protocols that depend on broadcast resolution

9. How to set up: Download Server Package from OpenVPN.net Or, AWS AMIs

10.  VPN is a method of creating a smaller sub network on top of an existing bigger network while VLAN is a subcategory of VPN

11.  A VLAN is used to group computers that are not usually within same geography into the same broadcast domain while VPN is most commonly related to remote access to a company’s network

12.  sniffing  transparent  uptime < 25%

13.  AWS charges, GAE doesn't.  1 GigaBytes / day for ONE application  Build one for your own  Easy to distribute  http://code.google.com/p/goagent/ http://code.google.com/p/goagent/

14. OpenVPN server: http://openvpn.net/index.php/access-server/download-openvpn-as- sw.html OpenVPN client: http://openvpn.net/?option=com_content&id=357 Install OpenVPN server on CentOS: (1) http://www.youtube.com/watch?v=aH1wkLZGhPQ (2) http://www.server-world.info/en/note?os=CentOS_6&p=openvpn (Server Directory: /usr/local/openvpn_as ; Admin: https://xxx:943/admin/ )https://xxx:943/admin/ VPN client config manager on Ubuntu: http://www.youtube.com/watch?v=IgsU86jdXIc *Bridge: http://openvpn.net/index.php/open- source/documentation/miscellaneous/76-ethernet-bridging.html Amazon Build-in OpenVPN AMIs: OpenVPN Access Server: http://docs.openvpn.net/how-to-tutorialsguides/virtual- platforms/amazon-ec2-appliance-ami-quick-start-guide/ StarCraft tools: http://www.teamliquid.net/forum/viewmessage.php?topic_id=72621

15. Q & A