Unable to ssh nodes with global IP

[Abu Attar Musharih]

On Mon, Oct 24, 2011 at 12:30 AM, Rick Sewill <rsewill at gmail.com> wrote:
> Question to the OP please.  Are you also behind your own router?
> Does it run NAT?  If yes, is it configured to forward an ssh connection,
> from the Internet, to your local host?

No, I am not. I do not have any router. My laptop is connecting via
mobile broadband and have a global IP.
$ ifconfig
ppp0      Link encap:Point-to-Point Protocol
          inet addr:120.166.xx.xxx  P-t-P:10.64.64.64  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:4245 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4914 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:1253230 (1.1 MiB)  TX bytes:948317 (926.0 KiB)
>
-deleted-
>
> How can one tell if one is behind a router that uses NAT?
> What is your local host's IP address?
> If your host's IP address is in the range, listed by rfc 1918,
> http://www.rfc-editor.org/rfc/rfc1918.txt
> 192.168.0.0 - 192.168.255.255, 172.16.0.0 - 172.31.255.255,
> or 10.0.0.0 - 10.255.255.255, you are behind a router running NAT.

If I switch my connection to another provider, so that I have  my own
router, and the IP of the nodes are no longer global, (IP range
192.168.1. 1 etc), I can ssh between them, as well as to outside.

regards,
AA