comp.os.linux.networking

Hi,

Is there a correct way to SSH into a remote device that is connected via 3G?

The following has been tried, but with no success:
Desktop in room A, connected to internet via ADSL.
Laptop in room B, connected to internet via 3G.

I tried to SSH from Desktop to Laptop but a timeout error occurs. The
Laptop can't seem to be detected via the internet.

Using ipconfig on the laptop, the subnet mask is 255.255.255.255.

Am I missing out something? Or is this timeout failure caused by
possible NAT arrangement on the ISP side? Is there any way to overcome
this failure?

Thanks,
Jeremy