Query related to Ubuntu WAN Ip?

your_shadow03 · 07-22-2009, 07:30 AM

I have a PC with Ubuntu on it.
My pc is connected to Internet like this:
Internet <-----> ADSL Modem <-----> PC(Ubuntu)

On ubuntu Machine I can only see eth0/eth1 oscillating one after another keeping changing from eth0 to eth1 and then eth1 to eth0.
(Donno the reason).
But My Question is when I run
#ifconfig
It just show me 192.168.1.1.
I have wired Broadband connection.
Why it dont display me WAN IP or Public IP.
Can anyone explain me that?

catkin · 07-22-2009, 08:12 AM

Hello your_shadow03

Quote:

Originally Posted by your_shadow03

On ubuntu Machine I can only see eth0/eth1 oscillating one after another keeping changing from eth0 to eth1 and then eth1 to eth0.

What do you do to see this?

Quote:

Originally Posted by your_shadow03

But My Question is when I run
#ifconfig
It just show me 192.168.1.1.
I have wired Broadband connection.
Why it dont display me WAN IP or Public IP.
Can anyone explain me that?

ifconfig tells you about the ports on the local machine which doesn't know about the IP address on the Internet side of your ADSL modem.

Most ADSL modems provide a browseable page where you can log on and see various things including your address on the Internet.

You can find your Internet address from several websites including http://checkip.dyndns.org/

Best

Charles

linuxlover.chaitanya · 07-22-2009, 08:42 AM

Exactly unless you have the port attached to your Ubuntu machine ifconfig command will not show your live ip there. It is assigned to the adsl modem port.

your_shadow03 · 07-22-2009, 12:29 PM

I tried running:
http://checkip.dyndns.org/

Current IP Address: 118.192.232.169

Yes..It seems the WAN IP.
I tried pinging the same from my office PC.
IF I tried creating a webpage under http://localhost/index.php on my home laptop with Ubuntu on it will it open at my office computer through http://118.192.232.169/index.php?

catkin · 07-22-2009, 12:50 PM

Quote:

Originally Posted by your_shadow03

I tried running:
http://checkip.dyndns.org/

Current IP Address: 118.192.232.169

It showed the above Output.
Is it WAN IP?

I have always believed so. Do you have reason to doubt?

linuxlover.chaitanya · 07-23-2009, 07:03 AM

Quote:

Originally Posted by your_shadow03

I tried running:
http://checkip.dyndns.org/

Current IP Address: 118.192.232.169

Yes..It seems the WAN IP.
I tried pinging the same from my office PC.
IF I tried creating a webpage under http://localhost/index.php on my home laptop with Ubuntu on it will it open at my office computer through http://118.192.232.169/index.php?

Well you will need to redirect to your local machine this request as this ip is wan live ip and it is not assigned to your ubuntu machine. it is assigned to your adsl. you will need to redirect the request.

your_shadow03 · 07-23-2009, 07:20 AM

What should be edited? Which File?

Code:

it is assigned to your adsl. you will need to redirect the request.

What should I do?

catkin · 07-23-2009, 07:48 AM

Hello your_shadow03

Quote:

Originally Posted by your_shadow03

What should be edited? Which File?

Code:

it is assigned to your adsl. you will need to redirect the request.

What should I do?

You have two choices if you want a webserver on your LAN to be accessible from the Internet (as opposed to your webserver initiating the connection): "bridging mode" and "port forwarding". Both require configuring your ADSL modem.

Port forwarding is more secure and easier. You will need to read your ADSL modem documentation and to know which ports are used by incoming connections from the Internet to your webserver. Here's a list of TCP and UDP ports. HTTP uses 80 and HTTPS uses 443. That might be enough ???

You probably don't not have the same IP address on the Internet all the time.

Best

Charles