Port Forwarding - WebSTAR DPC 2100

[sharpium64]

Hello everybody,

I have a rare problem about forwarding ports. I can't access my modem's port options. In "192.168.100.1" I olny see mac address, serial number etc. under "About Your Modem".

http://i40.tinypic.com/23r06lv.jpg

When I click the other tabs it says "This feature is not enabled"

http://i41.tinypic.com/142hki1.jpg

This is my ipconfig info

http://i39.tinypic.com/2qurg46.jpg

My external ip is the same as the internal.
I don't have a router so I connect it directly to the modem via RJ45 ethernet.
My ISP uses a Cable modem - WebSTAR DPC2100
http://www.cisco.com/web/consumer/support/modem_DPC2100.html

I have succeded forwarding ports in my other Prolink ADSL (another ISP) by following the guides provided by portforward.com.
But this cable modem and ISP is completely different and I don't have any idea how to do it.

Can you please guide me forwarding ports in this modem.

Thank you, Very much
I really appreciate your help.

PC Specs:
WinXP SP2
Athlon 3800x2 2ghz
Asus M2V
2GB RAM

[YeOldeStonecat]

So if you go to www.whatismyip.com is the IP address that shows up the same as the IP address you get when you run IPCONFIG on your computer?

If so, it's not doing any NAT, so there's no port forwarding to be done, you're running without a hardware firewall. (eek)

[sharpium64]

So if you go to www.whatismyip.com is the IP address that shows up the same as the IP address you get when you run IPCONFIG on your computer?

If so, it's not doing any NAT, so there's no port forwarding to be done, you're running without a hardware firewall. (eek)

Thank you very much YeOldeStonecat.

Yes, my IP is the same in ipconfig and http://www.whatismyip.com/

I check ports from http://www.canyouseeme.org/
Every ports I enter are blocked.

Btw, I disabled firewall and antivirus.

But the strange thing is whenever I start uTorrent and test the port that uTorrent is using, canyouseeme.org says it's open.
But when I close uTorrent canyouseeme.org says the port is close.

Why is that?

Should I run an application first before a port will be open?

Thanks

EDIT: Nevermind, I have just figured it out. Thanks though.