Unable to ssh nodes with global IP

[Abu Attar Musharih]

Dear List,

My internet connection is via mobile broadband. The ifconfig  lists
the ppp0 with IP address,


ppp0      Link encap:Point-to-Point Protocol
          inet addr:120.165.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:5239 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6371 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:3867747 (3.6 MiB)  TX bytes:1020544 (996.6 KiB)

I tried to remote login (using ssh) to this IP address from another
machine but failed.

The following message appears,

ssh: connect to host 120.166.xx.xxx port 22: Connection timed out


Editing  /etc/sysconfig/iptables and add --dport 22 -j Accept does not help.

Could any one please provide some suggestions?

Thanks in advance,
 AA