Anyone using Mobile-IP combined with PPP and dynamic IP address ?

Anyone using Mobile-IP combined with PPP and dynamic IP address ?

Post by Ulrich Leodolte » Sat, 07 Feb 1998 04:00:00

Has anyone tried to use Mobile-IP combined with PPP and dynamic IP
address ?
(maybe it's not possible at all)

I would like to integrate my Linux Workstation at home, connected via
and dynamic IP address to the internet, into the Linux network at work.
The network at work consists of a server with a register domaine name
and two
eth interfaces, one for the outside, and one for a local network.
is used to allow local workstations the internet access.  I would like
to see my workstation at home as one of these local workstations, if it

I tried something with tunl0 interface (as described in NET-3-HOWTO),
i had no success.

Is there any way to do this ?

Thanks for any help!
 Ulrich Leodolter
 University of Vienna, Institute of Psychology



1. dynamic ip address - how to get to know my ip address?

Hi there,

my ISP provides me with a dynamic ip address. I'm using a wireless LAN
router made by SMC to connect to the internet. I want to get to know the
public ip address from a computer that is located in the local network
behind the router's firewall. But, of course, the router's NAT replaces the
public ip address with the local one.

How do I get to know the public ip address the ISP gave me?

Currently, I'm not using Linux. But I consider to set up a Linux box that
will be accessible from the internet. I guess, this problem is not
platform-dependent. Unfortunately, my router does not have a telnet
interface or any other interface that would provide me with the public ip
address. Only, if login to the web interface manually, I can see the current
status including the current ip address.

Can I solve this problem with standard TCP/IP tools? "ping" does not give
any evidence -- I was sniffing with Ethereal to miss no information.

Do I need help from an external system that can tell me my ip address? Is
there a service, I can use?

Thanks in advance,


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