3

I am working on a project where we have to download videos from DVR box which is at a remote location( Different country). Problem is the client is using 3G router and Cisco vpn client to communicate with their datacenter and application at different stores. They are using IPSec for communication. One more thing, DVR box and application at store is not directly connected. For DVR devices they are using Dynamic DNS. The problem is I dint find anything helpful over the internet to get an idea how Dynamic DNS works with 3G and is this possible to do? Do I need a vpn connection as well to communicate with DVR box? I am very confused, can someone help?

Vaibhav
  • 1,479
  • 8
  • 13
  • Problem is, you don't know what kind of trickery the 3G carrier is doing. Your best bet is to use the IP that is assigned through the VPN (to the datacenter), and maintain that connection. If that IP isn't world-routable, you may be able to work around it with port forwarding? good luck. – Woodrow Douglass Jun 13 '12 at 12:37
  • @ Woodrow :-Thanks for the quick response, but the problem is that, for Digital-video-Recorder(DVR box) the client is not providing the static IP. And they have a datacenter(which is internal application data) with which their store application is interacting using VPN. – Vaibhav Jun 13 '12 at 12:49

1 Answers1

2

With 3G you are most likely connect via your mobile operator NAT. To check this out - see which external IP address assigned to the 3G router, it's most likely starts with 10., or 172.16.....172.31, or 192.168. In such setup dynamic DNS will cut no ice - DNS in this case will reflect IP of the mobile provider NAT, and you can not forward ports on those.

Mobile operator can probably assign you a real IP, and even static IP, sometimes for some small fee. Either - this, or VPN.

Sandman4
  • 2,673
  • 2
  • 22
  • 18